Entries |
Document | Title | Date |
20080204027 | Magnetic Resonance Receive Coil with Dynamic Range Control - A radio frequency receive coil ( | 08-28-2008 |
20080204028 | MAGNETIC RESONANCE COIL SYSTEM - A magnetic resonance coil system | 08-28-2008 |
20080231281 | RF COIL ASSEMBLY AND METHOD FOR PRACTICING MAGNETIZATION TRANSFER ON MAGNETIC RESONANCE IMAGING AND SPECTROSCOPY SYSTEMS - An RF coil assembly for an MRI system includes a resonator formed by a cylindrical shield and pairs of opposing conductive legs disposed symmetrically around a central axis and extending the axial length of the shield. One set of conductive leg pairs is tuned to operate at the Larmor frequency of | 09-25-2008 |
20080231282 | On-coil switched mode amplifier for parallel transmission in MRI - Example systems, apparatus, circuits, and so on described herein concern parallel transmission in MRI. One example apparatus includes at least two field effect transistors (FETs) that are connected by a coil that includes an LC (inductance-capacitance) leg. The apparatus includes a controller that inputs a digital signal to the FETs to control the production of an output analog radio frequency (RF) signal. The LC leg is to selectively alter the output analog RF signal and the analog RF signal is used in parallel magnetic resonance imaging (MRI) transmission. | 09-25-2008 |
20080238425 | SYSTEM AND METHOD FOR DESIGNING IMPROVED RF PULSE PROFILES - A system and method are provided for designing RF pulses which have improved magnetization profiles. By utilizing an optimal control approach as an alternative to, or in combination with, non-iterative approximations, RF pulses generated by the system and method described herein will exhibit less deviation from that of “ideal” Bloch solutions. Consequently, the magnetization profiles produced by the RF pulses generated by the system and method described herein will be closer to the desired profiles. In addition, limitations of non-iterative approximations, such as maximum tip angle limits and linearity constraints, can be avoided. | 10-02-2008 |
20080238426 | METHOD AND APPARATUS FOR REDUCING ALIASING ARTIFACTS IN THE IMAGING FOR MR-MONITORED HIFU THERAPY - In a method and magnetic resonance (MR apparatus for reducing aliasing artifacts in the imaging for MR-monitored high intensity focused ultrasound HIFU therapy, a primary coil is used to receive the MR signals, and an additional coil is provided to receive interfering MR signals that form aliasing artifacts in the MR-monitored HIFU therapy imaging. The MR signals received by the primary coil and the interfering MR signals received by the additional coil are concurrently acquired. The interfering MR signals received by the additional coil are removed from the MR signals received by the primary coil. MR images are generated based on the MR signals with the interfering MR signals removed. Aliasing artifacts caused by the interfering MR signals thus are removed from the MR images without reducing the resolution of the scanned body parts in the MR images. In addition, the MR scanning time can be maintained by using a proper phase oversampling technology in the concurrent signal acquisition. | 10-02-2008 |
20080258730 | NUCLEAR MAGNETIC RESONANCE (NMR) PROBE - There is provided a nuclear magnetic resonance probe in which the loss caused by a high frequency cable between a probe coil and a preamplifier is reduced and the sensitivity of an NMR signal is improved. A changeover switch for NMR probe is divided into a switch part including switch elements and a filter part for filtering a switch control signal and an RF transmission signal. The switch part is disposed in a probe body inserted in a magnet of the probe. The filter part is disposed near a measurement apparatus located outside the probe. As for the switch part, a section structure of thickness and width is reduced in conformity with a narrow and slender shape of the probe body. The length of a high frequency cable between the probe coil and the preamplifier is shortened remarkably, and consequently the loss can be reduced. | 10-23-2008 |
20080258731 | High Impedance Differential Input Preamplifier and Antenna for Mri - Antenna assemblies for magnetic resonance signals comprise a non-resonant loop antenna and a high impedance differential amplifier. The amplifier can include first and second high electron mobility transistors that have gates coupled to an antenna loop that is defined on a rigid substrate. The non-resonant loop has an effective length of less than about 1/10 of a wavelength of a signal to be detected. Arrays of such loops can be defined on the rigid substrate, and HEMTs for the loops secured to the substrate. | 10-23-2008 |
20080258732 | MRI APPARATUS AND RF PULSE GENERATING CIRCUIT - An MRI apparatus includes: an RF coil to which analog RF pulse signals are applied; an RF pulse generating circuit which generates said analog RF pulse signals; and a magnetic resonance signal receiving circuit which receives analog magnetic resonance signals and converts these signals into baseband digital magnetic resonance signals, said RF pulse generating circuit comprising: a carrier signal generator which generates a digital carrier signal having a predetermined number of bits; a digital modulator which modulates said digital carrier signal with a digital envelope signal, thus generating digital RF pulse signals; a digital-analog converter which converts said digital RF pulse signals into the analog RF pulse signals; and an inversion unit which generates a digital inverted carrier signal having a two's complement relationship with said digital carrier signal and sends the digital inverted carrier signal to said magnetic resonance signal receiving circuit, said magnetic resonance signal receiving circuit comprising: an analog-digital converter which converts the analog magnetic resonance signals into digital magnetic resonance signals having a predetermined number of bits; and a digital demodulator which demodulates said digital magnetic resonance signals with said digital inverted carrier signal, thus converting these signals into the baseband digital magnetic resonance signals. | 10-23-2008 |
20080272786 | Integrated Power Supply for Surface Coils - A radio frequency receive coil for receiving a magnetic resonance signal includes a radio frequency antenna. The radio frequency antenna includes one or more electrical conductors ( | 11-06-2008 |
20080272787 | SYSTEM AND METHOD FOR MULTI-CHANNEL MR TRANSMISSION - A system and method for transmitting multiple radio frequency (RF) channels via an RF coil assembly are provided. An RF coil assembly having a number of coil elements may be configured to transmit a number of RF channels which is less than the number of coil elements thereof. Some implementations may use signal splitters for some or all of the RF channels to produce driving inputs for each coil element. By using more coil elements than RF channels, various embodiments may exhibit increased power efficiency and improved B1 uniformity. | 11-06-2008 |
20080272788 | Microcoil NMR Detectors - The present invention provides resonance circuits, detection devices incorporating such circuits, and methods for their design, construction, and use. | 11-06-2008 |
20080278168 | Transmission Line for Use in Rf Fields - An electrically conductive link (connection lead) or transmission line ( | 11-13-2008 |
20080284439 | SYSTEM AND METHOD FOR AMPLITUDE REDUCTION IN RF PULSE DESIGN - A system and method are provided for adjusting RF pulses and gradient waveforms to reduce B | 11-20-2008 |
20080303524 | Device consisting of a combination of a magnetic resonance tomograph and a positron emission tomograph - At least one embodiment is directed to a combination of an MR tomograph and a positron emission tomograph having avalanche photodiodes as reception elements. In at least one embodiment, the intention is to ensure that the avalanche photodiodes are kept at a constant temperature despite the exposure to heat from the MR components. It is proposed, in at least one embodiment, that cooling by Peltier elements | 12-11-2008 |
20090021261 | Rf trap tuned by selectively inserting electrically conductive tuning elements - A magnetic resonance imaging scanner ( | 01-22-2009 |
20090051363 | CIRCULATOR AND MAGNETIC RESONANCE DEVICE - A circulator has a ferrite, and the circulator is arranged in the vicinity of a device that produces a static magnetic field in the environment surrounding the device, this static magnetic field giving the circulator a non-reciprocal behavior, with respect to circulation of energy among the gates of the circulator, as a result of interaction of the ferrite with the static magnetic field. A magnetic resonance apparatus embodies such a circulator, and the basic field magnet of this magnetic resonance apparatus generates the static magnetic field. | 02-26-2009 |
20090058420 | Magnetic resonance apparatus and control method for the same - A magnetic resonance apparatus includes a coil which receives a magnetic resonance signal from a subject, a transmitting unit which transmits the magnetic resonance signal received by the coil with a radio signal of a frequency band different from that of the magnetic resonance signal, an unit which extracts the magnetic resonance signal from the radio signal, a battery which supplies power to the transmitting unit, a switch unit which turns on and off power supply from the battery to the transmitting unit, a unit which wirelessly transmits a startup signal and a stop signal, a receiving unit which receives the startup signal and the stop signal that have been wirelessly transmitted, and a unit which controls the switch unit to turn on the power supply when the receiving unit receives the startup signal and turn off the power supply when the receiving unit receives the stop signal. | 03-05-2009 |
20090079432 | TRANSCEIVE SURFACE COIL ARRAY FOR MAGNETIC RESONANCE IMAGING AND SPECTROSCOPY - A surface coil array comprises a surface coil support and an arrangement of non-overlapping magnetically decoupled surface coils mounted on the support. The surface coils encompass a volume into which a target to be imaged is placed. Magnetic decoupling circuits act between adjacent surface coils. Impedance matching circuitry couples the surface coils to conventional transmit and receive components. | 03-26-2009 |
20090091326 | MAGNETIC RESONANCE RF TRANSMISSION ARRANGEMENT AND METHOD WITH COMMONLY FED LABELING AND EXCITATION ANTENNAS - A radio-frequency transmission device for a magnetic resonance system to generate magnetic resonance exposures of an examination region of an examination subject, has: a first radio-frequency transmission antenna that emits radio-frequency signals in the examination region, a radio-frequency amplifier that supplies the first radio-frequency transmission antenna, with radio-frequency signals with a predetermined radio-frequency transmission power, and a second radio-frequency transmission antenna fashioned to label a medium flowing in the examination region and/or examination regions via emission of labeling radio-frequency signals, such that the medium can be identified in the generated magnetic resonance exposures of the examination region. The second radio-frequency transmission antenna is coupled with the radio-frequency amplifier to supply the first radio-frequency transmission antenna, such that it likewise supplies the second radio-frequency transmission antenna with radio-frequency signals with a predetermined radio-frequency transmission power for the emission of radio-frequency labeling signals. | 04-09-2009 |
20090096455 | ARRANGEMENT TO TRANSMIT MAGNETIC RESONANCE SIGNALS - An arrangement to transmit magnetic resonance signals has at least two reception branches. Each reception branch contains a single antenna of a local coil as well as an amplifier connected with the single antenna, such that an amplified magnetic resonance signal is formed from a magnetic resonance signal that is acquired via the single antenna. In a multiplexer, each input is connected with a respective reception branch, such that the amplified magnetic resonance signals of the reception branch are combined by the multiplexer into a resulting signal using a time multiplexing method. A transmission path is connected on one side with an output of the multiplexer and on the other side with a receiver, such that the resulting signal is transmitted from the multiplexer to the receiver via the transmission path. | 04-16-2009 |
20090096456 | ARRANGEMENT FOR TRANSMISSION OF MAGNETIC RESONANCE SIGNALS - An arrangement to transmit magnetic resonance signals has a local coil composed of a number of individual antennas for acquisition of radio-frequency signals of a magnetic resonance examination. Preamplifiers amplify the radio-frequency signals, and a transmission device transmits the radio-frequency signals from the local coil to the preamplifiers. The transmission device is fashioned as a readout coil and has a number of individual antennas. The individual antennas of the readout coil are magnetically coupled with the individual antennas of the local coil, with the individual antennas of the local coil and the individual antennas of the readout coil forming a linear MIMO transmission system describable by a transmission matrix. | 04-16-2009 |
20090102484 | BANDWIDTH EXPANSION IN MAGNETIC RESONANCE - A magnetic resonance imaging system includes a primary magnet and a secondary magnet operable to produce magnetic fields within a sample being imaged. The MRI system further includes at least one RF coil that is operable to receive electromagnetic frequencies from the sample. The RF coil is formed from tubing that serves as a cooling conduit through which flows a cooling fluid provided by a cooling source. The cooling fluid cools the RF coils to improve imaging of the sample. | 04-23-2009 |
20090121717 | RF ANTENNA WITH INTEGRATED ELECTRONICS - A radio frequency antenna comprising a resonant pickup circuit ( | 05-14-2009 |
20090121718 | PROBE FOR NMR MEASUREMENT - A probe for nuclear magnetic resonance (NMR) measurement provided with a multiple resonant circuit for detecting signals of two or more nuclides with high detection efficiency for nuclide at low resonant frequency comprises a multiple resonance radio frequency (RF) coil circuit that, with multiple lead lines connected to the RF coil, causes a part of the RF coil, separated by the connection points of the lead lines, to function as the inductor of a trap circuit that cuts off a signal at the frequency F | 05-14-2009 |
20090128153 | METHOD AND CIRCUIT ARRANGEMENT FOR OPERATING MULTI-CHANNEL TRANSMIT/RECEIVE ANTENNA DEVICES - Methods and circuit arrangements for operating a multi-channel transmit/receive antenna device or arrangement, especially for use in a magnetic resonance imaging (MRI) system, are disclosed by which RF amplifiers can be used to their full peak power capability without running the risk that the RF amplifier is damaged due to excessive reflected power at its output. Furthermore by evaluating certain forward and reflected power signals patient safety is achieved with respect to monitoring the limits of the specific absorption rate. | 05-21-2009 |
20090128154 | ULTRA LOW OUTPUT IMPEDANCE RF POWER AMPLIFIER FOR PARALLEL EXCITATION - An ultra low output impedance RF power amplifier for driving a multiple transmit coil Magnetic Resonance Imaging (MRI) system is described, comprising an output matching network with high power MOSFET operatively coupled to at least one transmit coil in the MRI system for a desired output power and impedance. This invention also describes a method for achieving decoupling using the RF power amplifier to drive at least one transmit coil. | 05-21-2009 |
20090128155 | RF coil and MRI apparatus - An RF coil having at least three different resonance frequencies, wherein one of the resonance frequencies is adjusted to be a frequency f | 05-21-2009 |
20090167306 | FOLDED GRADIENT TERMINAL BOARD END CONNECTOR - A folded gradient terminal board end connector includes a multi-layer terminal connection board having a plurality of connection paths and vias configured to provide intercrossing between a plurality of folded gradient coils and further to provide symmetry between the plurality of folded gradient coils without spatial interference between folded portions of the plurality of folded gradient coils to optimize the folded gradient coil efficiency. | 07-02-2009 |
20090167307 | FERROMAGNETIC DETECTION ENHANCER - An apparatus for increasing the ability to detect ferromagnetic objects by increasing the magnetization of the objects. The apparatus includes at least one coil to generate a magnetic field positioned in the area of the object to be detected. The apparatus includes an electrical energy storage capacitor bank capable of quickly releasing stored energy. The apparatus includes a high speed, high current electronic switch capable of quickly transferring the stored energy from the capacitor bank to the coil thereby producing in the coil a short duration, single polarity magnetic field pulse. The apparatus includes a sample and hold circuit capable of acquiring magnetic field sensor data during periods when the pulsed magnetic field is not present. The apparatus includes a microprocessor controller to control timing and sequence of the magnetic pulse generation and the sensor data sample and hold process. The apparatus may be for portal handheld or head mounted applications. | 07-02-2009 |
20090189609 | APPARATUS FOR CONTROLLING AN ANTENNA ARRANGEMENT - A cylindrical antenna arrangement in a magnetic resonance apparatus has two feed points to feed in two partial signals, the two feed points being arranged on a cross-section of the antenna arrangement. The cross-section has a center point. A first angle is formed by the connection of a first feed point with the center point relative to a horizontal axis of the cross-section while a second angle is formed by the connection of a second feed point with the center point relative to the horizontal axis of the cross-section. An apparatus for controlling such an antenna arrangement has a device for signal splitting with two outputs and an input. A radio-frequency magnetic resonance signal is connected at the input. This signal is divided by the device for signal splitting into two partial signals of equal amplitude that are respectively supplied to an associated output. Each output of the device for signal splitting is connected with precisely one associated feed point of the antenna arrangement. An ellipse position in space is set for an elliptical polarization via the selection of the two angles. A device for phase adjustment is interposed between precisely one output of the device for signal splitting and the associated feed point in order to set an elliptical semi-axis ratio via variation of the phase difference of the two partial signals. | 07-30-2009 |
20090189610 | MAGNETIC RESONANCE IMAGING LOCAL COIL COMPOSED OF SEPARATE PARTS - A separate type coil for a magnetic resonance imaging system has a first partial coil in a first partial casing and a second partial coil in a second partial casing, the first and second partial coils being connected to a connector for connection to the imaging system via a first cable and a second cable, respectively. The coil also has a coupler having a first part and a second part that are coupled to each other. The first part of the coupler is disposed in the first partial casing and is connected to the first partial coil, the second part of the coupler is disposed in the second partial casing The first cable is disposed in the second partial casing, and the second part of the coupler is connected to the connector for connection to the imaging system via the first cable. This separate type coil couples and connects the signals in the first partial coil to the cable and the connector via the coupler, so as to ensure the reliability of the electrical connections. | 07-30-2009 |
20090189611 | MAGNETIC RESONANCE IMAGING SYSTEM WITH REDUCED UNINTENTIONAL MECHANICAL MOVEMENTS - A magnetic resonance imaging (MRI) system ( | 07-30-2009 |
20090201022 | CONTROL APPARATUS FOR A MAGNETIC RESONANCE IMAGING ANTENNA ARRANGEMENT - An apparatus to control an antenna arrangement in a magnetic resonance apparatus has an amplifier with an input connected to a radio-frequency transmission signal to be amplified. The antenna arrangement has at least one antenna element for emission of the amplified transmission signal. The antenna element has an infeed point with two terminals, wherein the amplified transmission signal is connected at the terminals. The amplifier is connected on the output side with two terminals of the infeed point. The antenna element has at the infeed point, a mounting surface to accommodate the amplifier. | 08-13-2009 |
20090206840 | MAGNETIC RESONANCE RECEIVE COIL ARRAY INTEGRATED INTO WALL OF SCANNER BORE - In a magnetic resonance scanner, a radio frequency transmit coil ( | 08-20-2009 |
20090219025 | COIL AND MRI SYSTEM - A coil includes a coil element to receive MR signals with a first frequency from a subject. The coil element includes a main current path section in which an MR current arising due to electromagnetic induction of the MR signals with said first frequency flows, and a current blocking section that makes smaller than said MR current an electromagnetic current flowing in said main current path section due to electromagnetic induction of electromagnetic waves with a second frequency different from said first frequency. | 09-03-2009 |
20090219026 | MULTI-CHANNEL BIRDCAGE BODY COIL FOR MAGNETIC RESONANCE IMAGING - A birdcage multi-channel body coil has a number of coil units that form a cylindrical shape, and they are connected in succession in the circumferential direction along the side face of the cylinder. The coil units are provided with capacitors with selected capacitance values that eliminate coupling between the coil units. This multi-channel body coil simply and conveniently eliminates the coupling between the coil units. | 09-03-2009 |
20090230966 | METHODS AND APPARATUSES FOR CONNECTING RECEIVE COILS IN MAGNETIC RESONANCE IMAGING SCANNERS - A coils array ( | 09-17-2009 |
20090237081 | ARRANGEMENT TO DETUNE A RECEPTION ANTENNA IN A LOCAL COIL - An arrangement to detune a reception antenna in a local coil of a magnetic resonance system, with at least one reception antenna that is fashioned as a loop antenna and that has at least one first capacitance. Radio-frequency signals of a magnetic resonance examination are received via the reception antenna. A switchable detuning circuit contains the first capacitance connected to an oscillating circuit and a first inductance. A reception device to receive a control signal is coupled with the oscillating circuit. The reception device switches the oscillating circuit into a high-resistance state given a received control signal so that a receipt of a radio-frequency signal via the reception antenna is prevented. The reception device is fashioned to receive a wirelessly transmitted radio-frequency control signal. The radio-frequency control signal has a frequency that lies outside of the bandwidth of the radio-frequency signal used for magnetic resonance examination. | 09-24-2009 |
20090243612 | VOLUME COIL FOR MRI SYSTEM - A volume coil for a magnetic resonance imaging system is composed of a number of coil units. In the coil, there are overlapped parts between two adjacent ones of the coil units for eliminating coupling between these two adjacent coil units. Two next-adjacent ones of the coil units, which are separated from each other by one coil unit, are each provided with an inductor, and these two inductors are coupled with each other for eliminating coupling between these two next-adjacent coil units. All coil units are collected on one axial end face of the coil. Two coil units in the coil that are neither adjacent coil units nor next-adjacent coil units are connected with each other on the end face by a capacitance circuit or a inductance circuit for eliminating the coupling between these two coil units that are neither adjacent coil units nor next-adjacent coil units. The coupling among the various coil units is relatively thoroughly eliminated, and the signal-to-noise ratio of the signal received by the coil is increased. | 10-01-2009 |
20090256574 | TRANSMISSION PATH FOR USE IN RF FIELDS PROVIDING REDUCED RF HEATING - A transmission path ( | 10-15-2009 |
20090302846 | RF-switched superconducting resonators and methods of switching thereof - A multimode resonator resonating at two or more frequencies is operated at cryogenic temperatures and composed of a superconducting material or a normal metal with a superconducting section serving as a RF superconducting switch. The multimode resonator is coupled to a NMR spectrometer and a RF switch power source, wherein its one frequency is selected to correspond to the operating frequency of the NMR spectrometer and at least a second frequency is tuned to a frequency of RF switch power source, unrelated to the spectrometer frequency, therefore power at this frequency does not perturb the operation of the spectrometer. When activated, the RF switch power source induces a current sufficient to approach or exceeds the critical current in one or more sections of the superconducting material of the multimode resonator, thereby increasing its resistance and reducing the Q factor of the multimode resonator. | 12-10-2009 |
20090309598 | APPARATUS FOR SUPPLYING STABLE, ISOLATED DC POWER AND METHOD OF MAKING SAME - A power supply having an input, wherein the power supply includes a multi-winding transformer having an input and a plurality of outputs, and a plurality of rectifiers to provide a plurality of DC output voltages, wherein each rectifier is coupled to an output of the multi-winding transformer. The power supply further includes a regulator circuit coupled between the transformer input and one of the transformer outputs, and configured to regulate an input voltage to the multi-winding transformer to minimize a variance of each rectifier DC output voltage. | 12-17-2009 |
20100039113 | DETUNING CIRCUIT AND DETUNING METHOD FOR AN MRI SYSTEM - The present invention relates to a magnetic resonance imaging system and a corresponding method having a transmit phase and a receive phase. Further, the present invention relates to a detuning circuit and a corresponding detuning method for detuning an RF receive coil during the transmit phase in such a magnetic resonance imaging system. In high-field MRI systems the transmit mode operating frequency is higher than normal high breakdown voltage rectifiers can handle when they are used to forward bias a passive detuning circuit PIN diode switch. The proposed circuit uses a current-limiting capacitor (C | 02-18-2010 |
20100052683 | DEVICE AND METHOD FOR SWITCHING A PIN DIODE - A circuit for switching a PIN diode has a PIN diode and an inductor (in particular a coil) as well as a direct voltage source and a group of switches, wherein in a first switch setting of the group of switches the PIN diode can be fed with current from the direct voltage source in its admission direction; and in a further switch setting the PIN diode and the inductor are separated from the direct voltage source and are arranged in a closed current loop such that the inductor can generate a discharge current upon transitioning to the further switch setting, which discharge current is directed to the PIN diode opposite to the current generated by the direct voltage source (DC). | 03-04-2010 |
20100090699 | POWER SUPPLY FOR RF COILS - A radio-frequency (RF) coil array for receiving magnetic resonance (MR) signals wherein the RF coil array ( | 04-15-2010 |
20100117650 | AMPLIFIER - A two port parametric amplifier has a first port that receives an input signal to be amplified and upconverted and a second port that receives a local oscillator signal. The amplified upconverted input signal is emitted as an output at upper and lower sideband frequencies. The amplifier further has a pair of varactor diodes connected between the first port and the second port. The diodes are connected in parallel from the first port and in series from the second port. | 05-13-2010 |
20100117651 | RECEIVER - A receiver for a wireless magnetic resonance imaging system comprises a pair of substantially identical notch filters ( | 05-13-2010 |
20100117652 | BORE TUBE ASSEMBLY - A wireless magnetic resonance imaging (MRI) scanner bore tube assembly has a radio frequency (RF) antenna, a microwave antenna array and an electrical screen. The RF antenna is formed of a series of RF antenna elements, each comprising a rung. The rungs are spaced at intervals of substantially half of the wavelength of the frequency of operation of the microwave antenna array. The microwave antenna array is formed by a series of microwave antenna elements interleaved between the rungs and the screen acts as a reflector to reflect signals from the microwave antenna elements towards the centre of the bore tube. | 05-13-2010 |
20100117653 | DIPLEX FILTER AND METHOD TO FILTER SIGNALS - A diplex filter is formed by two impedance-transforming filters with separate transmission frequency ranges and with separate cut-off frequency ranges and a connection node at which two series elements of the two filters are connected. These two series elements are each fashioned as a parallel oscillating circuit, each parallel oscillating circuit exhibiting a predetermined reactance in a midband of the respective transmission frequency range and a parallel resonance in a midband of the respective cut-off frequency range. The diplex filter can be realized in a simple and cost-effective manner without ferrite-containing special components, for instance inductively coupled coils or tapped coils thereby allowing use thereof in a magnetic resonance tomograph, for example. | 05-13-2010 |
20100141260 | RF Coils for Magnetic Resonance Tomography - A transmitting or receiving coil assembly for magnetic resonance tomographs comprising at least one flexible printed circuit board having inductors and at least one bar attached thereto for stiffening the flexible printed circuit board along one axis. The bar optionally has conductors for connecting electronic components on the printed circuit board with each other or with outside components of the magnetic resonance tomograph. | 06-10-2010 |
20100148779 | TRANSVERSE GRADIENT COIL FOR MRI SYSTEMS AND METHOD FOR MANUFACTURING THE SAME - A transverse gradient coil for an MRI system is provided. The transverse gradient coil comprises a first coil layer; and an insulation layer made of thermoplastic insulation resin which has a thermal conductivity greater than 1.5 W/m·K, the insulation layer having one side bonded to the first coil layer. A method for manufacturing the transverse gradient coil by injection molding or compression molding is also provided. | 06-17-2010 |
20100156423 | Signal Transmitting and Receiving Circuit, a NMR Probe, and a Nuclear Magnetic Resonance Equipment - An object of the invention is to change over accurately the switch part between use condition and nonuse condition. A signal transmitting and receiving circuit | 06-24-2010 |
20100164498 | INTEGRATED-CIRCUIT LOW-NOISE AMPLIFIER - It is proposed herein to improve the specifications of a low-noise amplifier (LNA) by integrating it in a chip. In order to cover a range of operating frequencies using a single chip, the integrated-circuit amplifier proposed herein comprises an input port configured to receive a magnetic resonance (MR) signal from a radio-frequency (RF) coil, one or more LNAs configured to amplify the received MR signal, and an output port configured to output the amplified MR signal from the one or more LNAs. The operating frequency of the RF coil depends on the field strength, The matching circuit, if present, needs to be tuned to operate at the operating frequency of the RF coil, and depends on the component values in the loop, thus on loop size. In contrast, the proposed integrated-circuit amplifier is capable of directly connecting to RF coils with different loop sizes, without the need for a matching circuit. | 07-01-2010 |
20100182009 | COIL DECOUPLING - A Magnetic Resonance Imaging (MRI) phased array head coil ( | 07-22-2010 |
20100182010 | CIRCUIT BOARD AND METHOD FOR ATTACHING AN ELECTRONIC MODULE TO A BODY COIL OF A MAGNETIC RESONANCE APPARATUS - Efficient mounting of a module to a whole-body coil of a magnetic resonance apparatus is enabled by a circuit board with conductive contact regions located at least in the area of an edge of the circuit board, with which contact regions contacts of an electronic module for a magnetic resonance apparatus are connected in a conductive manner. The contact regions of the circuit board are configured for electrical contact with the whole-body coil. | 07-22-2010 |
20100213941 | STRIPLINE ANTENNA AND ANTENNA ARRAY FOR A MAGNETIC RESONANCE DEVICE - An antenna ( | 08-26-2010 |
20100237869 | Controlling Multi-Channel Transmitter Effects on Specific Absorption Rate - Systems, methods, and other embodiments associated with controlling the specific absorption rate (SAR) in a patient associated with a conductor are described. The conductor may be, for example, a wire associated with a pacemaker, a wire associated with a neurostimulator, an orthopaedic device, and so on. One example method includes calibrating a multi-channel transmitter associated with a magnetic resonance imaging (MRI) apparatus imaging the patient. The example method also includes controlling the MRI apparatus to transmit radio frequency (RF) energy to image the patient in a manner where the RF energy will only influence the SAR near the conductor in the patient less than a desired threshold amount. | 09-23-2010 |
20100244840 | USING S-PARAMETER MEASUREMENTS TO MANAGE SAR AND TRANSMIT GAIN - Systems and methods for controlling a magnetic resonance imaging system are provided. In one embodiment, a magnetic resonance imaging system includes a radio frequency coil with a plurality of conductive coil elements, control circuitry that determines, based at least in part on a measurement of scattering parameters, a plurality of forward voltages that will cause power deposition into an object within a predetermined specific absorption rate, and an amplifier configured to apply the determined plurality of forward voltages respectively to the plurality of coil elements. The control circuitry may determine the plurality of forward voltages based at least in part on an unloaded measurement of scattering parameters and a loaded measurement of scattering parameters. | 09-30-2010 |
20100253354 | UPCONVERTER - An upconverter has a low noise amplifier, a two port mixer and an antenna. The two port mixer comprises a first port to receive from the low noise amplifier an amplified input signal to be upconverted and a second port to receive a local oscillator signal and to output the amplified, upconverted signal at upper and lower sideband frequencies. The low noise amplifier is coupled to the first port; and the antenna is coupled to the second port. | 10-07-2010 |
20100259264 | DATA PROCESSING SYSTEM, DATA PROCESSING METHOD, DIAGNOSTIC IMAGING APPARATUS, AND MAGNETIC RESONANCE IMAGING APPARATUS - A data processing system configured to process acquired image data (e.g., as part of a diagnostic imaging apparatus) uses a signal-power estimating unit for estimating signal power by using reference data containing data different from processing-target data and a data processing unit for processing the processing-target data by using a WF (wiener_filter) based on the signal power estimated by the signal-power estimating unit. | 10-14-2010 |
20100321020 | BANDWIDTH EXPANSION IN MAGNETIC RESONANCE - An apparatus for use in a magnetic resonance examination includes a radio frequency receive coil ( | 12-23-2010 |
20110018541 | ISO-PLANE BACKBONE FOR RADIATION DETECTORS - An imaging system comprises: a magnetic resonance scanner ( | 01-27-2011 |
20110037471 | MAGNETIC RESONANCE IMAGING APPARATUS - In a magnetic resonance imaging apparatus according to an embodiment, a transmitting coil applies a radio-frequency magnetic field to a subject placed in a static magnetic field. A receiving coil receives a magnetic resonance signal emitted from the subject owing to an application of the radio-frequency magnetic field. A balun is connected to the receiving coil, and suppresses an unbalanced current induced in the receiving coil. An overheat protection circuit indicates that the balun is abnormal when a temperature of the balun exceeds a temperature threshold. An imaging control unit stops imaging when the overheat protection circuit indicates an abnormality of the balun. | 02-17-2011 |
20110043209 | COIL DECOUPLING FOR AN RF COIL ARRAY - An MRI phase RF coil array includes a plurality of separate RF coil elements where each coil element has a pre-amplifier circuit with a conditioning circuit in advance of the transistor including an inductor and capacitors connected across the input of preamplifier. Each of the coil elements has a preamplifier decoupling parallel resonant circuit for generating a tuned high impedance across the ends of the coil so as to inhibit coupling in the coil from signals in adjacent and non-adjacent coils of the array. The decoupling circuit comprises a fixed first capacitor across the ends, a second variable capacitor in one of the leads, a further capacitor in the conditioning circuit, all of which define a capacitance which co-operates with the inductance defined by the inductor of the conditioning circuit of preamplifier to form the parallel resonant circuit to generate the high impedance. | 02-24-2011 |
20110043210 | MRI-Safe Implant Electronics - A power supply arrangement for an implantable electronic system is described. An MRI power supply arrangement cooperates with an implantable power supply circuit to provide a high output impedance for implanted circuitry during magnetic resonance imaging (MRI). | 02-24-2011 |
20110074425 | APPARATUS FOR FEEDING A MAGNETIC RESONANCE COIL ELEMENT AND METHOD OF MAKING SAME - A method, system, and apparatus including a magnetic resonance (MR) coil system that includes an MR coil element, a high input Pre-amplifier having a high input impedance field-effect-transistor (FET) with an impedance of one of substantially equal to 500 ohms and greater than 500 ohms, and a conductive path. The conductive path has a first end coupled to the MR coil element and a second end coupled to the high input Pre-amplifier such that the MR coil element is coupled in series with the high input Pre-amplifier. Further, the conductive path is free of a matching network intervening between the MR coil element and the high input Pre-amplifier. | 03-31-2011 |
20110074426 | Detector module for an emission tomography scanner - An emission tomography detector module and an emission tomography scanner are disclosed. In at least one embodiment, the emission tomography detector modules includes a scintillator to capture an photon, the scintillator emitting a scintillating light on capturing the photon; a first type of solid-state photodetector to detect the scintillating light; and a second type of solid-state photodetector to detect the scintillating light, wherein the first type of solid-state photodetector and the second type of solid-state photodetector are different with respect to a detecting property. | 03-31-2011 |
20110089949 | Parallel Imaging Apparatus and Method - A parallel MRI method and apparatus are provided. In some aspects the individual coils of the imaging array are designed to have optimized shapes and/or sizes to suit an imaging purpose. For example, varying coil sizes depending on an imaging effectiveness into a region or interest, including by combining more than one element of the array to form a virtual or combined element is used to reduce the computational requirements for parallel imaging. | 04-21-2011 |
20110109316 | MAGNETIC RESONANCE IMAGING APPARATUS, PHASE COMPARATOR, CONTROL UNIT AND COIL UNIT - According to one embodiment, an apparatus includes a control unit and a coil unit. The control unit generates a first clock signal, generates a data signal to indicate an operating condition, modulates the first clock signal by the data signal to obtain a modulated signal, generates a clock transmission signal including the modulated signal, and emits the clock transmission signal. The coil unit converts the clock transmission signal into an electric signal, detects the modulated signal from the clock transmission signal, generates a second clock signal synchronous with the first clock signal from the modulated signal, detects an MR signal generated in a subject, digitizes, synchronously with the second clock signal, the MR signal, detects the data signal from the detected modulated signal by using of the second clock signal, controls the operating condition of the coil unit to be the operating condition indicated by the data signal. | 05-12-2011 |
20110163751 | TRANSCEIVE SURFACE COIL ARRAY FOR MAGNETIC RESONANCE IMAGING AND SPECTROSCOPY - A surface coil array comprises a surface coil support and an arrangement of non-overlapping magnetically decoupled surface coils mounted on the support. The surface coils encompass a volume into which a target to be imaged is placed. Magnetic decoupling circuits act between adjacent surface coils. Impedance matching circuitry couples the surface coils to conventional transmit and receive components. | 07-07-2011 |
20110187371 | Transmit-Receive Switching Circuit for NMR Spectrometer and NMR Spectrometer Incorporating Same - A transmit-receive switching circuit is offered which is for use in an NMR spectrometer that employs a solid-state NMR probe using a cooled detection coil. The switching circuit is cryogenically cooled to reduce thermal noise in use. The switching circuit has a first terminal for applying high-power RF pulses sent in from the power amplifier of the NMR spectrometer, a second terminal for sending the RF pulses applied from the first terminal to the NMR detector via crossed-diodes and for receiving and entering a low-power NMR signal detected by the NMR detector, and a third terminal for sending the NMR signal entered from the second terminal toward a preamplifier. Plural stages of shunts are connected to the transmission line connecting the second and third terminals such that one stage of shunt corresponds to a 90° phase shift in the RF radiation. | 08-04-2011 |
20110215807 | Quadrature Endorectal Coils and Interface Devices Therefor - An intracavity probe for use with an MR system allows images and spectra of internal anatomical structures to be obtained. The intracavity probe houses within its balloon-type enclosure a single-element quadrature coil sensitive to both the vertical and horizontal components of the MR signal. The quadrature coil by means of its output line is designed to plug into a dedicated interface device with which to interface the quadrature coil with the MR system. Drive capacitors within the coil in conjunction with the electrical length of the output line and phase shifting networks within the interface device enable complete decoupling of the quadrature coil from the transmit fields generated by the MR system. Preamplifier, power splitting and combining networks within the interface device process voltage signals representative of the horizontal and vertical components of the MR signal and enable them to be conveyed to the input port(s) of the MR system. | 09-08-2011 |
20110221441 | LOCAL COIL FOR A MAGNETIC RESONANCE DEVICE - A local coil for a magnetic resonance device includes a connector apparatus for establishing a connection to a plug-in station on a patient couch and at least one storage facility. The storage facility may be used to read out by way of the connection and may store at least one non-modifiable data item describing a property of the local coil. The storage facility may include at least one detection facility for acquiring measurement values describing the state of the local coil and at least one evaluation facility configured to modify the readout address of the storage facility as a function of the measurement values. | 09-15-2011 |
20110227574 | MAGNETIC RESONANCE IMAGING APPARATUS - In one embodiment, an MRI apparatus includes first and second clock generators, a pulse generator, transmission and reception coils, pulse and phase detectors, and a corrector. The pulse generator generates an excitation pulse signal based on a clock signal generated by the first clock generator. The reception coil outputs a radio frequency signals corresponding to an excitation pulse transmitted from the transmission coil or an MR echo. The converter digitizes, synchronously with a clock signal generated by the second clock generator, the radio frequency signal, to obtain radio frequency data. The pulse detector detects excitation pulse data corresponding to the excitation pulse from the radio frequency data. The phase detector detects a phase of a pulse indicated by the detected excitation pulse data. The corrector corrects the radio frequency data based on the detected phase, to compensate for a phase offset which occurs in the echo during the digitization. | 09-22-2011 |
20110234229 | MAGNETIC RESONANCE SYSTEM - A magnetic resonance system includes at least one coil and at least one coaxial line connecting the at least one coil to an electronic receive system. The at least one coil includes a preprocessing device that converts the received signals to at least one transmission frequency that is different from a transmit frequency. The coaxial line includes at least one sheath wave barrier with a trap suppressing sheath waves of transmit frequency both on the outside and the inside of a sheath conductor of the coaxial line. | 09-29-2011 |
20110241685 | SWITCHED MODE PRE-AMPLIFICATION AND AM FEEDBACK FOR ON-COIL SWITCHED MODE AMPLIFIERS IN PARALLEL TRANSMISSION MRI - Example systems, apparatus, circuits, and so on described herein concern parallel transmission in MRI with on-coil current-mode (CMCD) amplifiers. One example apparatus includes switched voltage-mode class D (VMCD) pre-amplifiers. Another example apparatus includes amplitude modulation of the output of the CMCD amplifiers using feedback control based, at least in part, on a comparison of an envelope of transmit coil current to an envelope of an input RF pulse. | 10-06-2011 |
20110241686 | POWER SUPPLY FOR MAGNETIC RESONANCE IMAGING SYSTEM - In one embodiment, a power supply for a static tap changer transformer is provided. The power supply comprises a rectifier section configured to supply input voltage, a latch circuit section coupled to the rectifier section and a tap changing section comprising three taps for each phase of three phase input power supply. The latch circuit section comprises a zener breakdown circuit with a selected breakdown voltage rating, an operational amplifier configured to activate the latch circuit section when the input voltage is higher than the selected breakdown voltage, a gate control device configured to generate a tap changing signal and thereby control the operation of the latch circuit section and a semi-conductor diode coupled to the gate control device and the operational amplifier, the semiconductor diode configured to provide the tap changing signal to the operational amplifier. Further, each tap in the tap changing section comprises a single MOSFET configured to act as a switch based on the output from the zener breakdown circuit and the gate control device. | 10-06-2011 |
20110267061 | QUARTER WAVE BALUN FOR MAGNETIC RESONANCE IMAGING SYSTEMS - A balun assembly includes a body portion having an opening extending therethrough, the opening sized to receive at least one radio-frequency (RF) cable therethrough, the RF cable transmitting a signal therethrough a signal having a wavelength, and a balun disposed within the body portion, the balun being folded to form a plurality of layers, the combined length of the layers being approximately equal to a quarter wavelength of the signal transmitted through the RF cable. A method of fabricating a balun assembly and an MRI system including a balun are also provided. | 11-03-2011 |
20110267062 | BALUN AND MAGNETIC RESONANCE IMAGING APPARATUS - The present invention provides a technique for maintaining a function for effectively blocking common mode noise with a simple configuration, even in the case where unbalance occurs in characteristic impedance of a coaxial cable in an MRI apparatus, and improving the performance of an RF coil. In a circuit where a balun is established by parallel connection with the coaxial cable, multiple serial resonance circuits having different resonance frequencies are connected in parallel. A value of each constitutional element of each of the serial resonance circuits is adjusted in such a manner that the frequency for blocking the common mode noise of the entire balun falls into a range between the resonance frequencies of these serial resonance circuits. | 11-03-2011 |
20110291657 | MAGNETIC RESONANCE IMAGING COMPATIBLE SWITCHED MODE POWER SUPPLY - A switched mode power supply (SMPS) employs only energy storage components that are devoid of ferromagnetic materials. The SMPS operates only at switching frequencies such that any potential electromagnetic interference of interest is generated at frequencies appearing only outside the imaging bandwidth of a corresponding magnetic resonance imaging system powered by the SMPS. | 12-01-2011 |
20110316540 | TRANSMIT/RECEIVE SWITCH FOR A MINIATURIZED NMR DEVICE - A single-pole, double-throw, transmit/receive switch for switching a NMR coil between a transmit mode and a receive mode comprises two diode bridge switches on opposites sides of a node the is common with the two diode bridges and the NMR coil. One of the two diode bridges is positioned between the coil and a preamplifier for signals received from the coil, and the other diode bridge is positioned between the coil and a RF signal transmitter for connecting and disconnecting transmitted signals to and from the coil. The NMR coil is connected to the switches through a resonant impedance matching network. | 12-29-2011 |
20120019251 | MAGNETIC RESONANCE IMAGING METHOD, MAGNETIC RESONANCE IMAGING APPARATUS, AND CONTROL DEVICE OF MAGNETIC RESONANCE IMAGING APPARATUS - According to one embodiment, an MRI apparatus includes a signal acquisition unit, an image generating unit, a position acquiring unit, and a correction unit. The signal acquisition unit acquires a magnetic resonance signal produced from an object by applying a gradient magnetic field and an RF pulse in an imaging space where the object is placed. The image generating unit reconstructs image data on the object based on the magnetic resonance signal. The position acquiring unit acquires an imaging region as positional information in the imaging space. The correction unit brings a distribution of the gradient magnetic field close to a target distribution by transforming a waveform of the gradient magnetic field based on “the positional information and a time constant of an eddy-current magnetic field” to cancel the eddy-current magnetic field. | 01-26-2012 |
20120025832 | Modular MRI phased array antenna - An antenna configuration for use in a magnetic resonance apparatus, which is designed as phase-controlled array and comprises at least two individual antennas which each comprise at least one conductor loop, one tuning network and one matching network, wherein the tuning network contains at least one tuning capacitance and the matching network contains at least one matching capacitance, and the individual antennas are each combined into separate modules which are positioned on and mounted to a support body and can be removed therefrom in a non-destructive fashion, is characterized in that the individual antennas are connected to each other through decoupling elements, wherein the decoupling elements are mounted to the support body in an undetachable fashion. It is thereby possible to define individual antenna modules which can be arranged in a simple fashion around the measuring volume, are also electromagnetically decoupled from each other, and can be positioned close to the measuring volume in order to ensure that the received MRI image has a maximum, high signal-to-noise ratio. | 02-02-2012 |
20120025833 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus includes a bore configured to accommodate a subject therein, an RF coil positioned about the bore, and an RF shield positioned about the RF coil. The RF coil includes a first portion positioned adjacent a lower surface side of the bore and spaced a distance from the RF shield that is larger than a distance between a second portion of the RF coil and an upper surface side of the bore. | 02-02-2012 |
20120032679 | GRADIENT COIL ARRANGEMENT - A gradient coil arrangement for use in a magnetic imaging system, the imaging system being for generating a magnetic imaging field in an imaging region provided in a bore. The coil arrangement includes a first portion having a substantially cylindrical shape for positioning in the bore, a second portion extending outwardly from an end of the first portion, the second portion being for positioning outside the bore and at least one coil for generating a gradient magnetic field in the imaging region, the at least one coil having a first part provided on the first portion and a second part provided on the second portion. | 02-09-2012 |
20120032680 | LOW MAGNETIC FIELD RESONANCE SYSTEM - The invention provides a low-field nuclear magnetic resonance system for measuring a magnetic resonance signal of an object. The low-field nuclear magnetic resonance system includes a pre-magnetization module, a uniform magnetic field coil module, a pulse and receiving coil module, a filter amplifier module, a signal acquisition module and a processing module. The pre-magnetization module is used to establish a pre-magnetization field in the object to increase magnetization of the object. The uniform magnetic field coil module is used to change a resonance frequency and background magnetic field intensity of the object during nuclear magnetic resonance measurement by regulating a magnetic field of the coil. The processing module further includes a programming object for controlling timing processing and signal analysis of the measurement process. | 02-09-2012 |
20120062233 | INPUT IMPEDANCE OF LOW NOISE PREAMPLIFIERS USED FOR MRI - A preamplifier ( | 03-15-2012 |
20120074944 | DEVICES AND CABLING FOR USE IN A MULTI-RESONANT MAGNETIC RESONANCE SYSTEM - An apparatus for use in a magnetic resonance system, the apparatus comprising: an operative component ( | 03-29-2012 |
20120081119 | TRANSMISSION LINE PROBE FOR NMR - A probe for an NMR device is disclosed in which a saddle coil is disposed on one side of a flexible insulating material, and an additional conductor is disposed on the opposite side. The additional conductor and the conductors of the saddle coil create a capacitance across the insulating material. This capacitance acts with the inductance of the saddle coil such that the probe itself forms a transmission line. The probe is thus inherently broadband and requires no tuning. It also presents a constant impedance, thus facilitating impedance matching to an NMR spectrometer. In a preferred embodiment, a chip resistor is disposed on the flexible insulating material, terminating the transmission line. | 04-05-2012 |
20120081120 | HYPERPOLARISATION DEVICE USING PHOTONS WITH ORBITAL ANGULAR MOMENTUM - A magnetic resonance examination system comprises an RF-system for inducing resonance in polarised dipoles and receiving magnetic resonance signals from an object to be examined and an photonic-based hyperpolarisation device. The an electromagnetic source for emitting photonic radiation: —a mode converter to impart orbital angular momentum to the electromagnetic radiation; a spatial filter to select from the mode converter a diffracted or refracted photonic beam endowed with orbital angular momentum for polarising the dipoles via transferred orbital angular momentum; —a beam controller to apply the photonic beam endowed with orbital angular momentum over an extended target zone. | 04-05-2012 |
20120098541 | TESSERAL SHIM COIL FOR A MAGNETIC RESONANCE SYSTEM - A tesseral shim coil for shimming the magnetic field of a magnetic resonance system by generating the spherical harmonics of the sine and cosine type of the magnetic field, the tesseral shim coil comprising at least four saddle coils, wherein the sum of the azimuthal span of the at least four saddle coils is less than 360 degrees. First and second sets of shim coils, respectively generating sine and cosine components of the shim fields are combined into a single coil layer, thereby reducing the radial thickness of the shim coil assembly. | 04-26-2012 |
20120098542 | DETUNABLE RF RECEPTION ANTENNA DEVICE - The invention relates to a RF reception antenna device ( | 04-26-2012 |
20120105063 | SUPERCONDUCTIVE MAGNETIC COIL COMPRISING REGIONS HAVING DIFFERING HEAT TRANSFER - A superconductive magnetic coil is located in a cryostat for cooling purposes which is filled only up to a certain fill level with liquid helium. A helium gas phase having a temperature stratification, in which, for example, temperatures are present that can lead to a collapse of the superconductivity, forms over said helium accumulation. The magnetic coil is therefore subdivided into at least two partial regions having differing heat transfer between the coil and the surrounding medium. In a first partial region of the coil, in the surroundings of which a sufficiently low temperature for cooling is present, the heat transfer is high, while the magnetic coil in a second partial region, in the surroundings of which the temperature of the cooling medium is above a critical value, exhibits heat insulation. Consequently, no heat is exchanged between the coil and the surroundings in the second partial region, while cooling of the coil takes place in the first partial region. | 05-03-2012 |
20120105064 | RADIO FREQUENCY COIL FOR MAGNETIC RESONANCE IMAGING SYSTEM - In one embodiment a radio frequency receiver for a magnetic resonance imaging system is provided. The radio frequency receiver comprises a RF coil for receiving one or more radio frequency signals transmitted through an object to be imaged so as to enable a reconstruction processor to generate an image representation of the object based on the received radio frequency signals, a local oscillator configured for generating a stimulus, the stimulus comprising a range of radio frequency signals having different frequencies and a flux probe coupled to the local oscillator, the flux probe configured for applying the stimulus to the RF coil. Further, the RF coil is configured for returning a reflected signal in response to the stimulus applied and comprises at least one digitally tunable capacitor. | 05-03-2012 |
20120112750 | APPARATUS WITH LOCAL COIL ARRANGEMENT AND IMPLANTABLE DEVICE - The present embodiments relate to an apparatus that includes a local coil for a magnetic resonance tomography system and an implantable device. | 05-10-2012 |
20120112751 | METHOD AND MAGNETIC RESONANCE SYSTEM FOR COMBINING SIGNALS ACQUIRED FROM DIFFERENT ACQUISITION COILS - In a method and magnetic resonance (MR) apparatus for combining MR signals that were acquired with different acquisition coils from a region of an examination subject at least two MR signals that are based on MR signals acquired with at least two different acquisition coils are provided to a processor. Due to the spatially differing arrangement of the respective acquisition coils, the at least two MR signals image the region of the examination subject with different sensitivity profiles. The provided MR signals are combined, such that unwanted MR signal portions are suppressed, to form a combined MR signal with the suppression of unwanted MR signal portions being implemented by MR signal portions that were acquired with an acquisition coil that detects the unwanted MR signal portions with increased sensitivity in comparison to other acquisition coils being weighted less in the combined MR signal than other MR signal portions. | 05-10-2012 |
20120146646 | NANOPHOTONIC SYSTEM FOR OPTICAL DATA AND POWER TRANSMISSION IN MEDICAL IMAGING SYSTEMS - The present disclosure is directed towards the transmission of data and/or power using nanophotonic elements. For example, in one embodiment, a medical imaging system is provided. The imaging system includes a multiplexed photonic data transfer system having an optical modulator configured to receive an electrical signal representative of a set of data and being operable to modulate a subset of photons defined by time, wavelength, or polarization contained within a beam of light so as to encode the photons with the set of data to produce encoded photons, an optical waveguide interfacing with at least a portion of the optical modulator and configured to transmit the beam of light so as to allow the photons to be modulated by the optical modulator, an optical resonator in communication with the optical waveguide and configured to remove the encoded photons from the beam of light, and a transducer optically connected to the optical resonator and configured to convert the encoded photons into the electrical signal representative of the set of data. | 06-14-2012 |
20120153955 | MRI Short Coils - According to one aspect, a magnetic resonance imaging (MRI) scanner includes a short birdcage (e.g. millipede) distributed-capacitance radio-frequency (RF) coil formed from one or more patterned planar conductive foils. The transverse extent (e.g. diameter) of the coil is at least a factor of 3, for example about a factor of 10, larger than the longitudinal (z-axis) extent of the coil. Flux-return gaps may be provided between the sample measurement volume defined by the coil and RF shields adjacent to the sample measurement volume, to confine the RF magnetic field to the sample measurement volume. Exemplary coils described herein are particularly suited for very high-frequency MRI measurements. | 06-21-2012 |
20120153956 | MR COIL WITH MOVABLE ANTENNA ELEMENTS - The present embodiments relate to a local coil for a magnetic resonance tomography system. The local coil includes at least one coil element having an antenna. The at least one coil element is movable relative to a housing of the local coil. | 06-21-2012 |
20120153957 | RF COIL ASSEMBLY FOR MRI USING DIFFERENTLY SHAPED AND/OR SIZED COILS - A radio frequency coil assembly is provided that includes a first radio frequency coil for receiving a magnetic resonance signal from a tested body; a second radio frequency coil for receiving a magnetic resonance signal from the tested body; and a third radio frequency coil for receiving a magnetic resonance signal from the tested body and having a shape that is different from that of at least one of the first and second radio frequency coils so as to increase local sensitivity in an image-picked-up region. | 06-21-2012 |
20120161771 | LONG DISTANCE EXPLOSIVE DETECTION USING NUCLEAR QUADRUPOLE RESONANCE AND ONE OR MORE MONOPOLES - Rather than using balanced transmission lines the stimulated response due to nuclear quadrupole resonance can be detected using a single monopole, with multiple monopoles improving substance detection. | 06-28-2012 |
20120161772 | D-SHAPED COIL - The present embodiments relates to a magnetic resonance tomography system having a coil system. The coil system includes an upper part having at least one antenna and a lower part having at least one antenna. The upper part of the coil arrangement is disposed above a bore for receiving an examination subject. The lower part of the coil arrangement is disposed below a field of view of the magnetic resonance tomography system. The lower part of the coil arrangement is closer to the examination subject than the upper part of the coil arrangement. | 06-28-2012 |
20120161773 | MAGNETIC RESONANCE COIL DEVICE - The present embodiments relate to a magnetic resonance coil device for receiving magnetic resonance signals. The magnetic resonance coil device includes a receiving antenna unit, a signal processing unit, a high-frequency unit, and a transmitting antenna unit for cable-free transmission of the received magnetic resonance signals and/or data to a data receiving unit. The magnetic resonance coil device includes at least one substantially uncovered region, and the transmitting antenna unit is arranged in the at least one substantially uncovered region. | 06-28-2012 |
20120169342 | NUCLEAR QUADRUPOLE RESONANCE SYSTEM AND METHOD FOR INTERFACING WITH A SUBJECT MATERIAL - An improved system for interfacing with a subject material is provided where an interface material having target atoms with a known nuclear quadrupole resonance frequency is purposely associated with a subject material. An excitation signal is used to cause a nuclear quadrupole resonance of the target atoms and a receiving devices receives a received signal comprising a probe signal energy. A signal sampling device samples the received signal to produce detection data that is used for at least one of detecting the subject material, locating the subject material, tracking the subject material, or conveying information. | 07-05-2012 |
20120176136 | SHIMMING DEVICE FOR SUPERCONDUCTING MAGNET - This shimming device sequentially records a history of conducted shim setting, momentarily dynamically calculates compensation values corresponding to the record by the aid of a characteristic function, and dynamically controls the shim coil by the aid of the compensation values thus obtained, to thereby compensate the magnetic field fluctuation of the superconducting magnet which is attributable to the setting of the shim, and stabilizes the magnetic field, in an NMR superconducting magnet. This device includes shim setting recording means ( | 07-12-2012 |
20120176137 | GRADIENT MAGNETIC FIELD COIL AND MAGNETIC RESONANCE IMAGING DEVICE - In the magnetic resonance imaging device, the distance between the first and second coils is different in the circumferential direction and has a first region (A | 07-12-2012 |
20120182015 | DRUM-TYPE STANDING WAVE TRAP - A standing wave trap for a magnetic resonance tomography system includes a local coil connecting lead and at least one flexible printed circuit board in the local coil connecting lead. The local coil connecting lead is wound. | 07-19-2012 |
20120187949 | MAGNETIC RESONANCE APPARATUS - A magnetic resonance apparatus includes a receiving system with at least one receiver configured to process at least one receive signal of a receive channel. The magnetic resonance apparatus further includes at least one switching device configured to variably assign a first number of receive channels to a first number of inputs of the at least one receiver. The switching device has a crossbar switch and a pre-selection circuit connected upstream of the crossbar switch. Each receive channel of a first group of receive channels is directly connected to an input of a first group of inputs that is permanently assigned to the respective receive channel. | 07-26-2012 |
20120187950 | PRINTED CIRCUIT BOARD WITH INTEGRATED SHIELDING - A printed circuit board (PCB) is flat, providing a top side and a bottom side. A plurality of terminations is disposed on the top side in proximity to one end face of the PCB. Each termination has at least one contact that is connected to a respective conductor track of the PCB. The respective conductor track is connected to a respective local coil or to a contact disposed on the top side or the bottom side of a respective further termination. The local coil and/or at least one of the further terminations are disposed in proximity to the other end face. A basic shield impervious to frequencies in a magnetic resonance range is disposed on the top side and/or the bottom side, and an auxiliary shield electrically connected to the basic shield and impervious to frequencies in the magnetic resonance range is disposed on narrow sides of the PCB. | 07-26-2012 |
20120187951 | POWER AMPLIFIER FOR A MAGNETIC RESONANCE DEVICE - A power amplifier unit for a magnetic resonance device includes at least two power amplifier modules. Symmetrical output signals from the at least two power amplifier modules are fed to a shared balun. The shared balun is provided on a printed circuit board (PCB) and is realized in a unit with the at least two power amplifier modules. The balun is configured to asymmetrize a sum signal. | 07-26-2012 |
20120212225 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus includes a bore configured to accommodate a subject therein, an RF coil positioned about the bore, and an RF shield positioned about the RF coil. The RF coil includes a first portion positioned adjacent a lower surface side of the bore and spaced a distance from the RF shield that is larger than a distance between a second portion of the RF coil and an upper surface side of the bore. | 08-23-2012 |
20120217967 | MAGNETIC RESONANCE IMAGING APPARATUS - In a magnetic resonance imaging apparatus according to an embodiment, a measuring unit moves a couchtop on which a subject is placed to at least one position of a plurality of positions in an imaging space, adjusts shim coil current value supplied to the shim coil, and measures first shim coil current value when a static magnetic field is uniformized. On the basis of the first shim coil current value and at least one of subject information and an imaging condition, a calculator calculates second shim coil current value position of the plurality of positions and at which the measuring unit has measured no shim coil current value. | 08-30-2012 |
20120229141 | Optimized RF Shield Design - Radio frequency (RF) shields used with magnetic resonance imaging (MRI) apparatus may experience gradient field induced eddy currents and RF field induced eddy currents. These eddy currents can cause the RF shield to heat up at an undesirable rate. RF shields are designed to have a desired degree of RF shielding and a desired heating attribute. Design goals for RF shields include gradient field transparency and RF field opacity, both of which can be influenced by eddy currents. Example methods identify a gradient field that will induce eddy currents and identify an RF field that will induce eddy currents. If a region on the RF shield is identified where the desired heating attribute will not be achieved, then a pattern of axial cuts and azimuthal cuts can be made in the RF shield to reduce gradient eddy current heating in the RF shield while maintaining desired RF shielding. | 09-13-2012 |
20120235685 | GRADIENT COIL, MAGNETIC RESONANCE IMAGING DEVICE, AND METHOD FOR DESIGNING COIL PATTERN - A method for designing a coil pattern, whereby the production of an error magnetic field and further an eddy current can be suppressed to improve the quality of a cross-sectional image irrespective of cylindrical cross-sectional shape of the main coil and the shield coil. The difference between the initial values of the target magnetic field and the magnetic field vector is set as a difference target magnetic field. An approximate value of the current potential vector that produces the difference target magnetic field is represented by a polynomial of an eigenvector group of the current potential. The coefficient of each of the terms of the polynomial is determined on the basis of the singular value and the eigenvector group of the magnetic field distribution. | 09-20-2012 |
20120242337 | MRI Imaging Probe - A magnetic resonance imaging (MRI) probe apparatus is described. The MRI imaging probe includes a coil section having an imaging coil, and a handle section connected to the coil section. The handle section having a phase shifter circuit with inductors, capacitors, and coax line electrically connected and configured to provide appropriate phase shift. The handle section further having a coaxial cable winding electrically connected to the imaging coil, and wound cylindrically, and having a slot therethrough between the ends of the cylindrical winding. The handle section further having a pre-amp circuit mounted on a substrate and electrically connected to the cylindrical coax winding. | 09-27-2012 |
20120242338 | Doubly tuned RF resonator - An RF resonator has a birdcage resonator with two electrically conducting ring elements ( | 09-27-2012 |
20120242339 | MAGNETIC RESONANCE-COMPATIBLE ELECTRICAL DEVICE WITH RADIO FREQUENCY SHIELDING OR AN ENCLOSURE - An apparatus comprises an electrical device or component ( | 09-27-2012 |
20120242340 | APPARATUS FOR DETECTING SIGNALS - An apparatus for detecting magnetic resonance signals from a target, comprises a magnetic resonance sensor for responding to magnetic resonance signals from a target, and a shield member electrically isolated from the magnetic resonance sensor, the shield member being positioned relative to the magnetic resonance sensor such that when the magnetic resonance sensor faces the target, the shield member is behind the magnetic resonance sensor to at least partially shield the magnetic resonance sensor from magnetically coupling with sources other than the magnetic resonance signals. | 09-27-2012 |
20120249148 | MAGNETIC RESONANCE LOCAL COIL - The present embodiments relate to a magnetic resonance local coil with a receive antenna for receiving magnetic resonance signals. The magnetic resonance local coil also includes a transmission unit for transmitting magnetic resonance signal data generated on the basis of the magnetic resonance signals via a data transmit antenna of the magnetic resonance local coil to a signal data receiving unit of a magnetic resonance tomography systems. The transmission unit is provided, at least in sections, with screening with a first metal coating and a first dielectric coating. | 10-04-2012 |
20120256633 | RECEIVING COIL AND LOCAL COIL FOR MAGNETIC RESONANCE APPLICATIONS - A local coil for magnetic resonance applications includes a rigid housing that radially surrounds a substantially cylindrical examination volume. Arranged in the rigid housing is a transmitting coil, by which an excitation signal may be applied to the examination volume. An object to be examined arranged in the examination volume may be excited by the excitation signal for emitting a magnetic resonance signal. The local coil includes a size-variable structure, in which an antenna assembly for receiving the magnetic resonance signal emitted by the object to be examined is arranged. The size-variable structure is arranged in the examination volume and is connected to the rigid housing. The size-variable structure is soft and flexible. | 10-11-2012 |
20120268132 | Magnetic Resonance Signal Detection Using Remotely Positioned Receive Coils - The receive coil arrangement includes an inner local volume coil adjacent the part to be imaged so as to maximize the received MR signal and an outer coil, which may be the built in body coil of the magnet, connected by cable to the signal processing system. Both the coils are individually tuned to the common resonant frequency and the local volume coil include an arrangement to halt current flow therein during the transmit stage. The local volume coil has no cable and is arranged to communicate the MR signal therein to the signal processing system through the outer coil by inductive coupling to the outer coil. Despite inherent losses by interfering with the tuning of the loops and in the inductive coupling this magnifies the MR signal and makes the local volume coil wireless. | 10-25-2012 |
20120268133 | Modular multi-channel coil array for an MRI having decoupling of next but one neighbors - A multi-channel coil array for use as a transceiver in magnetic resonance imaging (MRI) has a plurality of radio frequency (RF) coils disposed next to one another, devices for electromagnetically decoupling the RF coils and coil elements which are applied onto a planar carrier element ( | 10-25-2012 |
20120280688 | Magnetic Resonance (MR) Radio Frequency (RF) Coil and/or High Resolution Nuclear Magnetic Resonance - An MR coil including an MR RF receive coil comprising graphene. | 11-08-2012 |
20120280689 | RETAINING CLIP FOR PLUGGABLE ELECTRONICS COMPONENTS - A local coil for a magnetic resonance tomography system includes a mainboard, at least one plug-in module that is connectable to the mainboard, and a clip engaging with the plug-in module and the mainboard. The clip is arranged at least partially at a side of the mainboard. | 11-08-2012 |
20120286786 | Phased Array MR RF Coil Which is Not Visible in X-Ray Image - An phased array RF coil used for MR imaging is designed so that it remains in place in the field of view of an X-Ray imaging system and comprises a support board on which copper or aluminum conductive traces are carried. The attenuation of the X-Rays caused by the traces is visible in the radiation image but this is compensated by arranging the non-conductive material of the support board such that the attenuation is substantially constant. The phased array includes individual coil loops which are overlapped with the traces being of half thickness at crossing locations of the traces and with one of the loops on one side and the other loop on the second side of the substrate sheet. | 11-15-2012 |
20120286787 | DIRECT DIGITAL RECEIVER WITH LOCAL FREE RUNNING CLOCK - The invention relates to direct digital receiver for an RF coil ( | 11-15-2012 |
20120286788 | RF TRANSMIT AND/OR RECEIVE ANTENNA FOR A HYBRID MRI/HIFU SYSTEM - An RF/MR transmit and/or receive antenna is disclosed for use in a hybrid magnetic resonance imaging (MRI) system (or MR scanner), which comprises an MRI system and another imaging system for example in the form of a high intensity focused ultrasound (HIFU) system. The RF transmit and/or receive antenna ( | 11-15-2012 |
20120293175 | LIQUID NITROGEN COOLED MRI COILS AND COIL ARRAYS - New method of cooling of MRI coil and resonators is disclosed and described. MRI coil designs showed in the disclosure are based solely on the use of copper tube elements filled with liquid nitrogen. Inside the conducting tubes at rf frequency there is no rf electric field, thus the liquid nitrogen presence inside such coils will not have any influence on MRI coil dielectric losses and on the resonant frequency modulation. Liquid nitrogen cooled coils, when in the coil noise regime, demonstrate | 11-22-2012 |
20120293176 | VARIABLE ROTATABLE MR COIL - A local coil for a magnetic resonance tomography system includes a plurality of coil elements. Each coil element of the plurality of coil elements has a point of application for another coil element of the plurality of coil elements. The coil element is connected to the other coil element at the point of application in a pivoting manner with respect to the coil element. | 11-22-2012 |
20120299593 | LOCAL COIL FOR A MAGNETIC RESONANCE DEVICE - A local coil for a magnetic resonance device includes a double resonance conductor loop arrangement having at least one conductor loop, and a converter apparatus configured for converting operating energy received at a first resonance frequency into an operating voltage. The local coil also includes an electronics arrangement operated with the operating voltage for processing magnetic resonance signals received at a second resonance frequency. | 11-29-2012 |
20120299594 | ANTENNA DEVICE - There is provided a technique for securing a comfortable examination space in a tunnel type MRI apparatus without increasing the manufacturing cost of the MRI apparatus and sacrificing performance thereof. In an RF coil provided with a hollow-shaped outer conductive element and a strip-shaped conductive element disposed along the outer conductive element in the axial direction, meander lines constituting the strip-shaped conductive element are disposed at uneven distances from the outer conductive element to secure an internal space. In order to obtain uniform sensitivity at the center of the RF coil, the strip-shaped conductive element is constituted with N of connected meander lines, and length of the strip-shaped conductive element is adjusted so that, in the strip-shaped conductive element resonating at resonance frequency of the antenna, nodes are formed in a number of (M+1)×N−1, wherein M is 0 or a natural number of 1 or larger. | 11-29-2012 |
20120306496 | HIGH-FREQUENCY ANTENNA - A high-frequency antenna unit for a magnetic resonance apparatus includes a high-frequency antenna and a shield unit. The shield unit, the high-frequency antenna, or a combination thereof is formed at least partially from a composite material. The composite material includes at least one electrically conducting material and at least one electrically non-conducting material. | 12-06-2012 |
20120306497 | RF RECEPTION COIL AND MAGNETIC RESONANCE IMAGING APPARATUS USING SAME - There is provided a technique for improving quality of images obtained with an MRI apparatus by using the geometric structures of the conventional RF transmission coil and RF reception coil and without increasing burden on patients or MRI technicians. A conductor loop of an RF reception coil disposed between a subject and an RF transmission coil is used also as a loop for magnetic field adjustment in order to shield or enhance a rotating magnetic field B | 12-06-2012 |
20120306498 | MULTICHANNEL RF SIGNAL SWITCHING DEVICE AND MAGNETIC RESONANCE IMAGING APPARATUS HAVING MULTICHANNEL RF SIGNAL SWITCHING DEVICE - A multichannel RF switching device of an embodiment has a connector in which all or some of a plurality of terminals a configured to be connected to a plurality of coil elements, a matrix switch having a plurality of input ports arranged in a line and a plurality of output ports arranged in a line, and a wiring portion connecting the respective terminals configured to be connected to the plural coil elements with a plurality of input ports in use included in the plural input ports one-on-one, the input ports in use amounting to fewer than the total number of the input ports, wherein the wiring portion connects the respective terminals with the input ports in use one-on-one in such away that a separation between adjacent two of all or some of the input ports in use is larger than a separation between adjacent two of the input ports. | 12-06-2012 |
20120306499 | FAILSAFE PROTECTION FROM INDUCED RF CURRENT FOR MRI RF COIL ASSEMBLY HAVING TRANSMIT FUNCTIONALITY - An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils. | 12-06-2012 |
20120313645 | LOCAL COIL SYSTEM, TRANSMITTING DEVICE, MAGNETIC RESONANCE SYSTEM AND METHOD FOR THE WIRELESS TRANSFER OF ENERGY TO A LOCAL COIL SYSTEM - A local coil system for a magnetic resonance system including at least one local coil for capturing magnetic resonance (MR) signals and at least one energy receiving antenna for inductively receiving energy for the local coil system from a temporally varying magnetic field is provided. The at least one energy receiving antenna is or may be tuned to an energy transfer frequency that is lower than a Larmor frequency of the MR signals to be captured and higher than approximately 20 kHz. | 12-13-2012 |
20120319688 | BALANCED MIXER FOR MRI SYSTEM AND METHOD OF MAKING SAME - A magnetic resonance imaging (MRI) apparatus includes an RF coil, a preamplifier module, and a hub coupled to the preamplifier module via a transmission line. The preamplifier module includes an amplifier configured to amplify a magnitude of a first signal from the RF coil, the first signal having a first frequency and a diode array coupled to the amplifier. The MRI apparatus also includes an intermediate frequency (IF) circuit coupled to the transmission line and an oscillator circuit coupled to the hub and configured to supply an oscillating signal to the diode array via the transmission line to cause the diode array to mix the oscillating signal with the first signal to generate an IF signal to be received by the IF circuit via the transmission line, wherein the IF signal has a second frequency that is lower than the first frequency. | 12-20-2012 |
20120319689 | MAGNETIC RESONANCE IMAGING APPARATUS - In a magnetic resonance imaging apparatus according to an embodiment, an array coil is structured by arranging a plurality of coil elements each of which receives a magnetic resonance signal generated from a subject. An acquisition controlling unit acquires the magnetic resonance signals while changing a position to be selected and excited within the subject who has the array coil attached thereon. A large-area image generating unit generates a large-area image of the subject, based on the magnetic resonance signals acquired by the acquisition controlling unit. A position measuring unit measures positions of the coil elements, based on strengths of the magnetic resonance signals used for generating the large-area image and positions of the couchtop corresponding to the times when the magnetic resonance signals were acquired. | 12-20-2012 |
20120319690 | Superconductor Magnetic Resonance Imaging System and Method (SUPER-MRI) - Methods and apparatuses for magnetic resonance imaging (MRI) and/or magnetic resonance spectroscopy comprising a superconducting main magnet operable to generate a uniform magnetic field in an examination region, at least one superconducting gradient field coil operable to apply a respective at least one magnetic field gradient within the examination region, and at least one RF coil that is operable to transmit and receive radio frequency signals to and from the examination region, and that is configured for cooling and comprises at least one of (i) a non-superconducting material that when cooled to a temperature below room temperature has a conductivity higher than that of copper at that temperature and (ii) a superconducting material. The main magnet, the gradient coils, and each of the at least one RF coil of a given system may each be implemented as high temperature superconductor materials. | 12-20-2012 |
20130002252 | SYSTEM AND APPARATUS FOR BALANCING RADIAL FORCES IN A GRADIENT COIL - A gradient coil apparatus for a magnetic resonance imaging (MRI) system includes an inner gradient coil assembly and an outer gradient coil assembly disposed around the inner gradient coil assembly. The outer gradient coil assembly has an outer surface, a first end and a second end. The gradient coil apparatus also includes a force balancing apparatus disposed around the outer surface of the outer gradient coil assembly. In one embodiment, the force balancing apparatus includes an active force balancing coil disposed around the outer surface of the outer gradient coil assembly. In another embodiment, the force balancing apparatus includes a first passive conducting strip disposed around the first end of the outer gradient coil assembly and a second passive conducting strip disposed around the second end of the outer gradient coil assembly. | 01-03-2013 |
20130002253 | ISOTROPIC METAMATERIAL LENS FOR MAGNETIC IMAGING APPLICATIONS - Examples of the present invention include metamaterial lenses that allow enhanced resolution imaging, for example in MRI apparatus. An example metamaterial may be configured to have μ=−1 along three orthogonal axes. Superior performance was demonstrated using such improved designs, and in some examples, imaging resolution better than λ/500 was obtained. The use of one or more lumped reactive elements in a unit cell, such as one or more lumped capacitors and/or one or more lumped inductors, allowed unit cell dimensions and hence resolution to be dramatically enhanced. In some examples, a cubic unit cell was used with an essentially isotropic magnetic permeability of μ=−1 obtained at an operating electromagnetic frequency and wavelength (λ). | 01-03-2013 |
20130002254 | METHOD FOR CREATING A MODULE FOR CONTROLLING A HIGH-FREQUENCY ANTENNA FOR A NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUS - A method for creating a module for controlling a magnetic resonance imaging apparatus antenna, the method including: determining magnetic field distribution mapping B | 01-03-2013 |
20130009644 | RF COIL UNIT AND MRI APPARATUS - An RF coil unit of an embodiment includes a plurality of first coil elements each having a first main loop which receives a magnetic resonance signal and a plurality of second coil elements each having a second main loop and a sub-loop protruding from a portion of the second main loop. Any combination of two coil elements chosen from the plural first coil elements and the plural second coil elements is arranged in an overlap area where areas surrounded by one and another one of the two coil elements overlap in such a way that the overlap area is located in an area surrounded by the first main loop. | 01-10-2013 |
20130009645 | FLOW-THROUGH NMR ANALYZER - A compact flow-through NMR analyzer with high NMR signal detection sensitivity is provided. The flow-through NMR analyzer comprises: a solution feeding pipe | 01-10-2013 |
20130015858 | LINEAR RESONATOR OF A HIGH-FREQUENCY ANTENNA FOR A NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUSAANM Ferrand; GuillaumeAACI ParisAACO FRAAGP Ferrand; Guillaume Paris FRAANM Luong; MichelAACI SceauxAACO FRAAGP Luong; Michel Sceaux FRAANM France; AlainAACI BordeauxAACO FRAAGP France; Alain Bordeaux FR - A linear resonator of a high-frequency antenna suitable for emitting a radiofrequency energisation signal and for receiving a radiofrequency relaxation signal, the linear resonator includes a radiating element to emit a radiofrequency energisation signal and receive a radiofrequency relaxation signal. The resonator also includes: a balun circuit including a power-supply line and two coupling lines; a substrate made of a dielectric material, supporting the radiating element which contains the balun circuit; two contact points connecting the balun circuit to the radiating element, the contact points being formed by one of the ends of the coupling lines extending out of the substrate, the distance separating the two contact points being selected so as to ensure the impedance matching of the resonator; and a chip floorplan separating the coupling lines from the radiating element. | 01-17-2013 |
20130021035 | MRT LOCAL COIL - A local coil for a magnetic resonance tomography device includes an elastic antenna support part with several antennas and an electronic part with electronic components connected to the antennas via supply lines. At least one part of the electronic part is located outside of the antenna support part. | 01-24-2013 |
20130027040 | MAGNETIC RESONANCE RADIO-FREQUENCY COIL AND METHOD OF MANUFACTURING - A Magnetic Resonance (MR) Radio-Frequency (RF) coil and method of manufacturing are provided for a multi-modality imaging system. The multi-modality imaging system includes a Magnetic Resonance (MR) scanner portion configured to acquired MR data of a patient using one or more MR Radio-Frequency (RF) coils. The one or more MR RF coils are formed from carbon nanotube conductors. The multi-modality imaging system also includes a radiation potion configured to transmit radiation through or detect radiation from the patient. | 01-31-2013 |
20130027041 | METHOD OF PERFORMING MRI WITH AN ATOMIC MAGNETOMETER - A method and apparatus are provided for performing an in-situ magnetic resonance imaging of an object. The method includes the steps of providing an atomic magnetometer, coupling a magnetic field generated by magnetically resonating samples of the object through a flux transformer to the atomic magnetometer and measuring a magnetic resonance of the atomic magnetometer. | 01-31-2013 |
20130038330 | Systems, Devices, Methods, and Compositions Including Ferromagnetic Structures - Magnetic resonance systems, devices, methods, and compositions are provided. A nuclear magnetic resonance imaging composition includes, but is not limited to, a plurality of ferromagnetic microstructures configured to generate a time-invariant magnetic field within at least a portion of one or more internal surface-defined voids. In an embodiment, at least one of the plurality of ferromagnetic microstructures includes one or more targeting moieties attached thereof. | 02-14-2013 |
20130038331 | COIL CAPABLE OF GENERATING AN INTENSE MAGNETIC FIELD AND METHOD FOR MANUFACTURING SAID COIL - The invention relates to a method for manufacturing a coil for generating an intense magnetic field when an electric current passes through it, comprising the formation of turns in a cylindrical tube made of conducting or superconducting material, the formation of at least one indentation in an edge of at least one turn of said coil and the positioning of insulating material between the turn comprising the indentation and an adjacent turn, said recess being made in the edge to form with the insulating material a channel between the interior and the exterior of the tube when the coil is stressed. | 02-14-2013 |
20130043871 | METHOD AND APPARATUS FOR CONTROLLING AN AMPLIFIER OF A MAGNETIC RESONANCE IMAGING DEVICE - An magnetic resonance imaging (MRI) device includes at least one amplifier, a control module which controls an operating module of the at least one amplifier, a back-up control module, a determination unit for determining whether the control module is operating normally, and a switching module for performing a switching operation to switch operations of the control module to the at least one back-up control module in the event of abnormal operation of the control module. | 02-21-2013 |
20130049754 | ITERATIVE RECONSTRUCTION METHOD WITH PENALTY TERMS FROM EXAMINATION OBJECTS - A method is disclosed for calculating an MR image of a target layer from an examination object, wherein the MR image is calculated using iterative reconstruction. In at least one embodiment, the method includes: acquiring MR data from an initial layer of the examination object, determining information produced by the examination object from the acquired MR data of the initial layer, determining a penalty term from the information produced by the examination object, and performing the iterative reconstruction of the MR image for the target layer taking into account the determined penalty term. | 02-28-2013 |
20130049755 | HELICAL GRADIENT COIL FOR MAGNETIC RESONANCE IMAGING APPARATUS - A gradient coil is provided. The gradient coil comprises: a first layer comprised of a first plurality of turns of wires; and a second layer of coil comprised of a second plurality of turns of wires. Each turn of wire in the first and second plurality of turns of wires circles along the side walls of a cylindrical substrate and each turn of wire in the first and second plurality of turns of wires include a first portion wound along the inner side wall of the substrate and a second portion wound along the outer side wall of the substrate. | 02-28-2013 |
20130049756 | METHODS, SYSTEMS, AND DEVICES FOR INTRA-SCAN MOTION CORRECTION - Systems, methods, and devices for intra-scan motion correction to compensate not only from one line or acquisition step to the next, but also within each acquisition step or line in k-space. The systems, methods, and devices for intra-scan motion correction can comprise updating geometry parameters, phase, read, and/or other encoding gradients, applying a correction gradient block, and/or correcting residual errors in orientation, pose, and/or gradient/phase. | 02-28-2013 |
20130057284 | LOCAL COIL FOR MAGNETIC RESONANCE APPLICATIONS AND A MAGNETIC RESONANCE SYSTEM - A local coil for magnetic resonance applications includes a receiving antenna operable to receive an analog magnetic resonance signal excited in an examination subject by an excitation signal. The local coil includes an analog-to-digital converter that is supplied with the received analog magnetic resonance signal from the receiving antenna. The analog-to-digital converter converts the analog magnetic resonance signal into a digital magnetic resonance signal. The local coil includes a first transmission system that is supplied with the digital magnetic resonance signal by the analog-to-digital converter and emits the digital magnetic resonance signal via a transmitting antenna at a first data rate into the environment of the local coil. The local coil includes a second transmission system that is different from the first transmission system. The second transmission system emits data into the environment of the local coil at a second data rate that is lower than the first data rate. | 03-07-2013 |
20130057285 | MAGNETIC RESONANCE IMAGING DEVICE - An object of the present invention is to provide a measuring technique which allows in the MRS measurement to suppress with a high degree of precision, incorporation of a signal of unwanted compounds which hinders measurement of a measurement object signal, independent of an imaging object region and the measurement object signal, thereby obtaining a stable and favorable signal spectrum. In the MRS measuring sequence, a spectrum selective inversion RF pulse, having a narrow band characteristic for selectively inverting only a signal peak of a compounds to be suppressed, and phase dispersion-refocusing GC pulses are applied at least one of before and after a region selective RF pulse. This MRS measuring sequence is repeated while changing the echo time TE at predetermined intervals, and nuclear magnetic resonance signals being obtained by the repetition are integrated. The amount of the spectrum selective inversion RF pulse to be applied may be changed according to the echo time TE. | 03-07-2013 |
20130069652 | RF COIL AND MAGNETIC RESONANCE IMAGING DEVICE - There is a provided a technology of receiving a magnetic resonance signal highly sensitively and with a uniform sensitivity distribution in an RF coil of an MRI device which is an RF coil including a switch circuit of switching a circuit configuration. The RF coil of the MRI device of the present invention includes a switch circuit of switching a circuit configuration. Also, the switch circuit switches the circuit configuration by being driven by a control signal received by wireless. For that purpose, the switch circuit includes an antenna of receiving the control signal and a conversion circuit of converting an alternating current voltage received into a direct current voltage. | 03-21-2013 |
20130069653 | DEVICE FOR POWER MEASUREMENT AND MAGNETIC RESONANCE DEVICE - A device for power measurement for the purposes of plausibility checking and/or calibration of a primary power measurement device on a power amplifier of a magnetic resonance device is provided. The device includes a circulator arranged between an output of the power amplifier and a switching device for connection of the power amplifier to a transmit antenna. A first input of the circulator is connected to the output of the power amplifier, a second input of the circulator is connected to the switching device, and a third input of the circulator is connected to a secondary power measurement device configured for measurement of a signal reflected on the open switching device or the transmit antenna. | 03-21-2013 |
20130076358 | ADJUSTABLE MRI HEAD COIL APPARATUS AND MRI SYSTEM - An adjustable MRI head coil apparatus and MRI system include a fixture and a plurality of plates attached to the fixture. Each of the plurality of plates includes a plurality of RF receive elements arranged in a fixed orientation. The adjustable MRI head coil apparatus and MRI system also include an actuator mechanism configured to adjust the relative position of each of the plurality of plates in order to fit a variety of different patient head sizes. | 03-28-2013 |
20130076359 | OUTPUT STAGE MODULE FOR A POWER AMPLIFIER DEVICE - An output stage module for a power amplifier device (e.g., for a power amplifier device of a transmit unit of a magnetic resonance device) includes a housing and a carrier that is arranged within the housing. The carrier is made of a non-electrically-conducting, thermally-conducting material with low electrical losses (e.g., a ceramic carrier). At least two transistor dies are arranged on the carrier. At least one transistor, in each case, is assigned to a phase of a symmetrical input signal. In and/or on the carrier, a first conductor structure connecting (e.g., inductively) a drain output of the at least two transistor dies to an output signal and to second conductor structures each conducting an input signal to at least one gate input of the at least two transistor dies are provided. At least one cooling channel routed adjacent to at least one transistor die of the at least two transistor dies is provided. | 03-28-2013 |
20130076360 | POWER MODULE AND MANUFACTURING PROCESS - A power module for a high frequency amplifier unit is provided. The power module includes a base support plate, on which at least one power electronic module is contacted via a number of contact pins. A shield plate is arranged on a side of the power electronic module facing away from the base support plate. The power electronic module is in contact with a cooling element at a side facing the shield plate. | 03-28-2013 |
20130076361 | RF RECEIVING COIL AND MAGNETIC RESONANCE IMAGING APPARATUS USING THE SAME - To order to provide an RF receiving coil having a structure that can be safely mounted on an object and an MRI apparatus including the RF receiving coil, the RF receiving coil includes a main body having one or more flexible closed conductor loops for receiving a nuclear magnetic resonance signal, a flexible outer cover section that covers the closed conductor loop, a preamplifier section that amplifies the nuclear magnetic resonance signal received by the closed conductor loop, and a housing section in which the preamplifier section is housed and which is more rigid than the outer cover section. The RF receiving coil is mounted on the object in a state where the main body is bent such that the end surfaces of both ends of the main body face each other, and the MRI apparatus performs imaging using such an RF receiving coil. | 03-28-2013 |
20130082710 | SYSTEM FOR TRAVELLING WAVE MR IMAGING AT LOW FREQUENCIES AND METHOD OF MAKING SAME - A system for travelling wave MR imaging includes an MR imaging apparatus having a magnet coil assembly having a magnet coil bore extending therethrough, a gradient coil assembly positioned within the magnet coil bore and having a gradient coil bore extending therethrough, and a waveguide positioned within the gradient coil bore. The waveguide has a waveguide bore extending therethrough. A computer is programmed to access a scan sequence comprising an RF pulse sequence and execute the scan sequence. During execution of the scan sequence, the computer is programmed to operate the waveguide in a hybrid mode to transmit an RF pulse of the RF pulse scan sequence as a travelling wave at a frequency lower than a cutoff frequency of a principal mode of the waveguide absent a dielectric core and to acquire MR signals from an imaging subject positioned within the waveguide bore. | 04-04-2013 |
20130082711 | SIGNAL SPLITTER - A signal splitter for creating at least two symmetrical equal-power signals from an input signal for use in an amplifier device includes at least one input terminal pair and at least two output terminal pairs. A primary conductor structure supplied from the at least one input terminal pair is provided for induction of a current flow in at least two secondary conductor structures each connected to an output terminal pair of the at least two output terminal pairs and the at least two secondary conductor structures. A center of a conductor length of each of the at least two secondary conductor structures is connected to ground, and the primary conductor structure and the at least two secondary conductor structures are realized as conductor tracks applied to a printed circuit board. | 04-04-2013 |
20130082712 | MEDICAL IMAGING APPARATUS - A medical imaging apparatus includes a first imaging modality which is formed by a magnetic resonance apparatus and which comprises a cylindrical gradient coil unit, and a further imaging modality which comprises a detector unit. The detector unit of the further imaging modality is supported in a radial direction within an area surrounded by the gradient coil unit and an annular gap is disposed between the detector unit of the further imaging modality and the gradient coil unit. The further imaging modality includes a pressure unit which is disposed in the annular gap between the detector unit of the further imaging modality and the gradient coil unit. | 04-04-2013 |
20130088233 | Shield for Electronic Circuit - A metal structure includes a plurality of non-contiguous subsections on a substrate. The subsections are at least partially capacitively connected to one another. This is achieved by the subsections having overlaps on both sides of the substrate and/or by the subsections being connected to one another by capacitors. The capacitive coupling produced constitutes a short circuit for high frequencies and an open circuit for low frequencies. This results in the frequency-selective surface. | 04-11-2013 |
20130088234 | GRADIENT COIL POWER SUPPLY AND A MAGNETIC RESONANCE IMAGING SYSTEM - A gradient coil power supply ( | 04-11-2013 |
20130099788 | SYSTEM AND METHOD FOR GRADIENT AMPLIFIER CONTROL - A gradient amplifier for driving a gradient coil is disclosed. The gradient amplifier includes a direct current (DC) bus for receiving DC voltage generated from a series resonant converter, an inverter coupled to the DC bus configured to receive the DC voltage at the DC bus and convert the DC voltage to generate an output voltage to be applied to the gradient coil, and an inverter controller coupled to the inverter. The inverter controller is configured to generate control signals to control operation of the inverter based at least on a DC voltage feedback signal measured at the DC bus, an output voltage feedback signal measured at the output of the inverter, and a reference output voltage signal indicative of a desired voltage to be achieved at the output of the inverter. | 04-25-2013 |
20130099789 | RESONANCE CIRCUIT HAVING A VARIABLE RESONANCE FREQUENCY - A resonance circuit with a variable resonance frequency provided by a variable capacitor having compliant electrodes arranged on a deformable sheet. When the sheet is deformed the capacitance is varied. Further a sensing element comprising the resonance circuit and a sensing system comprising at least one sensing element, a sending unit and a receiving unit. Suitable for mass production. Provides wireless sensing system being cost effective to manufacture. May be used for low cost products, such as toys. May also be used for monitoring displacements in structures, e.g. cracks in wall structures. Further a positions sensitive pressure sensor with pressure sensors arranged on a two-dimensional structure. | 04-25-2013 |
20130106419 | LOCAL COIL FOR MAGNETIC RESONANCE APPLICATIONS | 05-02-2013 |
20130106420 | MAGNETIC RESONANCE IMAGING GRADIENT COIL, MAGNET ASSEMBLY, AND SYSTEM | 05-02-2013 |
20130113485 | Stacked Coil for Magnetic Resonance Imaging - A receive coil for MRI includes a stacked pair of coil elements to communicate the respective MR signals therein to the signal processing system in separate channels. This greatly increases image SNR and penetration depth and in parallel imaging. The coils are arranged in a stacked relationship so as to be at least partly and preferably wholly overlapped and lying in the same or closely adjacent planes. The coils include tuning capacitors to a common resonant frequency. The coils are connected by a conductor arranged such that the signals of the first and second coils are decoupled. The conductor can form a common portion of the coils including a capacitance of in the common portion arranged. The coils can be connected by two conductors one of which is a short and the other contains a capacitor. In both cases the connection conductors provide the decoupling. | 05-09-2013 |
20130113486 | MAGNETIC RESONANCE IMAGING APPARATUS - In one embodiment, an MRI apparatus ( | 05-09-2013 |
20130119987 | Spatially Coincident MRI Receiver Coils and Method For Manufacturing - A magnetic resonance imaging receiver coil provides for high SNR and high uniformity over a range of loading conditions with layers, or stacks, of independent conductive elements. The plurality of layers preload the receiver coil reducing the circuit variation as the subject coupling and loading varies. The preload is such that coil performance, or SNR, is maintained over a large range of impedance variation. This configuration is designed to exceed the performance of single trace coils over a range of impedance consistent with variations associated with different subjects, and may also incorporate coils of different resonance frequencies. | 05-16-2013 |
20130119988 | Local Coil - A local coil for a magnetic resonance tomography device includes a plurality of antenna elements. Each antenna element of the plurality of antenna elements has two conductor tracks. The conductor tracks are disposed on opposite sides of an insulator and are connected electrically conductively to one another by plated through-holes through the insulator. In areas, in which conductor tracks of at least two antenna elements of the plurality of antenna elements cross, at least one antenna element of the at least two antenna elements only has a conductor track on one side of the insulator. | 05-16-2013 |
20130119989 | MRT System with a Magnetic Coil and Method for Manufacturing a Circuit Arrangement for Switching a Coil Current - In a magnetic resonance tomography (MRT) system, a current strength of a coil current is controllable by a plurality of semiconductor power switches as a function of a control signal. The plurality of semiconductor power switches receive the control signal at respective control inputs from a control line. In each of at least two semiconductor power switches of the plurality of semiconductor power switches, a compensation resistance element is connected between the control input and the control line. Resistance values of the compensation resistance elements are different. | 05-16-2013 |
20130119990 | SYSTEM FOR ORDERING FREQUENCY DOMAIN COMPONENTS REPRESENTING MR IMAGE DATA - A system orders acquisition of frequency domain components representing MR image data for storage in a storage array (e.g., k-space). A storage array of individual data elements stores corresponding individual frequency components comprising an MR dataset. The array of individual data elements has a designated center and individual data elements individually have a radius to the designated center. A magnetic field generator generates a magnetic field for use in acquiring multiple individual frequency components corresponding to individual data elements in the storage array. The individual frequency components are successively acquired in an order in which radius of respective corresponding individual data elements increases and decreases as the multiple individual frequency components are sequentially acquired during acquisition of an MR dataset representing an MR image. A storage processor stores individual frequency components acquired using the magnetic field in corresponding individual data elements in the array. | 05-16-2013 |
20130119991 | HIGH-FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING DEVICE EMPLOYING SAME - A technique is provided to reserve large examination space in the tunnel type MRI apparatus, without increasing production cost nor reducing significantly irradiation efficiency and homogeneity in an irradiation distribution within an imaging region. The present invention provides an RF coil unit in which four partial cylindrical coils are placed with a gap therebetween in the circumferential direction inside a cylindrical RF shield, in such a manner that two pairs of the partial cylindrical coils are opposed to each other, and magnetic fields produced by the individual partial cylindrical coils are combined, thereby producing a circularly polarized wave field or an elliptically polarized wave field. The partial cylindrical coil is provided with a partial cylindrical conductor, multiple first conductors substantially parallel with the central axis of the RF shield, multiple capacitors connecting both ends of the first conductors with the partial cylindrical conductor, and a second conductor adjacent to at least one of the ends of the first conductor. The partial cylindrical coils are respectively provided with high frequency signals having a desired amplitude ratio and phase difference, while a reference frequency thereof being identical. | 05-16-2013 |
20130127468 | Gradient-Independent Shim Coil for a Local Coil of a Magnetic Resonance Device - A shim coil device for installation and/or arrangement within a local coil of a magnetic resonance device is provided. The shim coil device includes at least one shim coil formed by at least one conductor loop, and at least one compensation coil formed by at least one conductor loop. The at least one shim coil and the at least one compensation coil are arranged in a same coil plane. An overall arrangement of the at least one shim coil and the at least one compensation coil is symmetrical about a first central axis and a second central axis. The first central axis and the second central axis are perpendicular to each other and lie in the coil plane. An overall induction surface is enclosed by the at least one conductor loop of the at least one compensation coil corresponding to an overall induction surface enclosed by the at least one conductor loop of the at least one shim coil. | 05-23-2013 |
20130127469 | Local Coil - A local coil for an imaging system includes an anterior torso part and a posterior torso part that are detachably connected to one another with a fastening device. | 05-23-2013 |
20130134979 | Volume Array Coil with Enforced Uniform Element Currents for Improved Excitation Homogeneity - Each of the coils in a transmit coil array of a magnetic resonance imaging apparatus is electrically connected to a common voltage point by a transmission line. By controlling the electrical length of the transmission line connecting each of the coils to the common voltage point to an odd integer multiple of one quarter wavelength, the current delivered to each coil is independent of coil impedance. This principle of forced current excitation enables equal currents to be delivered to each coil of a magnetic resonance imaging transmit coil array regardless of the unique loading of the individual coils and mutual impedance between the coils. | 05-30-2013 |
20130134980 | Receiving Method, Receiving System for Magnetic Resonance Signals, and Magnetic Resonance Imaging System - A method and system for receiving magnetic resonance signals, and a magnetic resonance imaging system are provided. The method includes dividing coil units in a receiving coil array into different coil unit groups. For each of the coil unit groups, correlations are established between carrier frequencies and the signals received by each coil unit in the coil unit group. Low noise amplification is performed, and filtering and frequency mixing is performed on the signals received by all the coil units in the coil unit group according to the correlations to obtain intermediate frequency signals borne on the respectively corresponding carrier frequencies of an identical channel. After performing amplification and filtering on the intermediate frequency signals, the intermediate frequency signals are output to an analog-to-digital conversion unit to perform digital sampling so as to obtain digital domain signals. | 05-30-2013 |
20130147486 | Power Amplifier Device for a Magnetic Resonance Machine - A power amplifier device for a magnetic resonance machine includes a housing, in which a first printed circuit board including at least one amplifier module having at least one power electronics component and at least one conductor pattern connected to the power electronics component is arranged. A second printed circuit board including at least one power electronics component and a conductor pattern is also arranged in the housing. The conductor pattern of the second printed circuit board is connected to at least one connection point of the first printed circuit board in order to supply voltage to the amplifier module. At least one cooling duct for cooling the power electronics components is arranged in the housing. At least two of the power electronics components are arranged such that the electronics components are thermally connected to a common cooling duct on opposite sides of the cooling duct. | 06-13-2013 |
20130154648 | SYSTEM AND APPARATUS FOR COMPENSATING FOR MAGNETIC FIELD DISTORTION IN AN MRI SYSTEM - A magnet apparatus for a magnetic resonance imaging system, the magnet apparatus includes a vacuum vessel, a helium vessel disposed within the vacuum vessel and a thermal shield disposed between the vacuum vessel and the helium vessel. A set of passive compensation coils are disposed within the vacuum vessel or the helium vessel and used to compensate for magnetic field distortion caused by mechanical vibrations within the magnet apparatus. | 06-20-2013 |
20130169277 | POTTING COMPOUND SUITABLE FOR POTTING AN ELECTRONIC COMPONENT, IN PARTICULAR A LARGE-VOLUME COIL SUCH AS A GRADIENT COIL - The invention relates to a potting compound suitable for potting an electronic component, in particular a large-volume coil such as a gradient coil, consisting of a supporting matrix in which at least one filler made of polymer nanoparticles is distributed. At least one filler ( | 07-04-2013 |
20130181716 | INTEGRATED SHEATH CURRENT FILTER IN A LOCAL COIL - A local coil for an imaging system includes a sheath current filter and one or more lines run through the sheath current filter. | 07-18-2013 |
20130181717 | POWER SUPPLY CIRCUIT AND MAGNETIC RESONANCE IMAGING APPARATUS - According to one embodiment, a power supply circuit includes at least an input phase determining unit and an input phase switching unit. The input phase determining unit is configured to determine, of three phases of the input three-phase alternating current, a phase of a highest voltage and a phase of a lowest voltage at a given time. The input phase switching unit is configured to switch an input voltage to a primary coil of a transformer so as to input, during a first switching period, a voltage of the highest voltage phase to one terminal of the primary coil and a voltage of the lowest voltage phase to another terminal, and configured to input, during a second switching period being contiguous to the first switching period, a voltage of the lowest voltage phase to the one terminal and a voltage of the highest voltage phase to the another terminal. | 07-18-2013 |
20130193974 | RADIO FREQUENCY (RF) BODY COIL ASSEMBLY FOR DUAL-MODALITY IMAGING - A radio frequency (RF) body coil assembly includes a coil support structure including an inner tubular member, an outer tubular member disposed radially outwardly from the inner tubular member, and a structural material disposed between the inner and outer tubular members, an RF coil mounted to an inner surface of the coil support structure, and a positron emission tomography (PET) detector assembly mounted to an outer surface of the coil support structure. A dual-modality imaging system is also described. | 08-01-2013 |
20130200898 | Digital Amplitude Control and Digital Phase Control of a High-Frequency Signal - A method for digital amplitude control and digital phase control of a high-frequency signal is provided. A digital command signal specifies in complex form, including a real subcomponent and an imaginary subcomponent, an amplitude and a phase of the high-frequency signal that is to be controlled. A digital activation signal is output to a high-frequency unit for the purpose of generating the high-frequency signal. A digital signal deviation value is received in complex form including a real subcomponent and an imaginary subcomponent. The signal deviation value expresses a deviation of the high-frequency signal from the command signal with respect to the amplitude and the phase. The digital activation signal is determined from the command signal while taking into consideration the signal deviation value. The determination of the real subcomponent and the imaginary subcomponent takes place separately in each case. | 08-08-2013 |
20130200899 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus provided with an RF receiver having a power producing module configured to produce power that is to be supplied to the RF receiver through an RF pulse which is applied to a subject from an RF transmitting coil, the magnetic resonance imaging apparatus including an RF receiver provided with an RF transmitting coil configured to apply an RF pulse to a subject to excite an atomic nucleus, and with a power producing module configured to produce power by receiving the RF pulse applied by the RF transmitting coil. | 08-08-2013 |
20130200900 | MRI PHANTOM WITH A PLURALITY OF COMPARTMENTS FOR T1 CALIBRATION - Disclosed herein is a magnetic resonance imaging calibration assembly in particular, for dynamic contrast—enhanced magnetic resonance imaging. An exemplary magnetic resonance imaging calibration assembly according to the present disclosure can comprise a subject receptacle for receiving at least a portion of a subject. The exemplary magnetic resonance imaging calibration assembly can further comprise a plurality of phantom compartments, each of which can contain a calibration phantom with a predetermined known T relaxation time. The plurality of phantom compartments can be attached to the subject receptacle in different ways. For example, according to some exemplary embodiments of the 10 present invention, the phantom compartments are separate compartments attached or fixed onto the subject receptacle. According to other exemplary embodiments, the phantom compartments can be formed at least partially by the subject receptacle. The phantom can be for a T1 calibration making use of its known T1. | 08-08-2013 |
20130207657 | POLE PIECE - There are disclosed pole piece designs. In embodiments a pole piece comprises a rear face, the rear face comprising at least one channel. In embodiments the pole piece comprises at least one hole for accepting a cooperating shimming rod. There are also disclosed magnet arrays and magnetic resonance apparatuses comprising the pole pieces as well as uses of the pole pieces with magnet arrays according to embodiments. | 08-15-2013 |
20130207658 | Superconducting Magnet Device - Disclosed is a compact superconducting magnet device for generating an intense and homogeneous magnetic field component Bz along an axis Oz in a zone of interest ZI successively includes, starting from the axis Oz, at least two coaxial superconducting helical coils formed around circular cylinder sections of axis Oz delimited by end circles. The lateral ends of the helical coils are arranged, to within the thickness of the coils, in the vicinity of one same sphere of radius c whose centre O is placed on the axis Oz at the centre of the zone of interest ZI and which encompasses the magnetic device assembly. The azimuthal current densities j | 08-15-2013 |
20130207659 | RF SHIELD FOR MRI COMPRISING CONDUCTIVE COATING AS SHIELDING MATERIAL - The invention relates to a magnetic resonance imaging system ( | 08-15-2013 |
20130207660 | RF ANTENNA ARRANGEMENT FOR MRI COMPRISING A TRAP CIRCUIT - An RF antenna or coil comprising a decoupling circuit including a parallel resonant trap circuit is disclosed for electromagnetically decoupling the RF antenna or coil when both RF antennas or coils are arranged in such proximity to each other that without a decoupling circuit couplings between both RF antennas or coils have to be expected which might lead to a decrease of the signal to noise ratio of received and/or transmitted RF signals or which couplings might lead other detrimental effects. Further, an RF transmit/receive antenna arrangement especially for an MR (magnetic resonance) imaging system or scanner is disclosed, wherein the RF transmit/receive antenna arrangement comprises an RF transmit antenna or coil which is preferably provided only for transmitting RF signals, and an RF receive antenna or coil which is preferably provided only for receiving MR signals (i.e. “dedicated” RF antennas or coils), wherein at least one of theses RF antennas or coils is provided with a decoupling circuit according to the invention. | 08-15-2013 |
20130214785 | MAGNETIC RESONANCE IMAGING DEVICE - Images of two or more kinds of substances showing different chemical shifts, such as water image and metabolite image, are obtained without extending measurement time. For example, images of two or more kinds of desired substances showing different chemical shifts, such as water image and metabolite image, are obtained by one time of execution of an imaging sequence. In this execution, a pre-pulse is applied so that signals of the substances to be separated shift on the image, and magnetic resonance signals are received with receiver RF coils in a number not smaller than the number of types of the substances to be separated. An image reconstructed from the magnetic resonance signals is separated into images of the individual substances using sensitivity maps of the receiver RF coils. Then, correction is performed for returning the shifted image to the original position. Further, residual signals induced by errors generated in the measurement and the separation processing are eliminated by using spectroscopic images obtained after the separation. | 08-22-2013 |
20130221967 | Radio Frequency Coil Device and Magnetic Resonance Imaging Apparatus - An RF coil device and an MM apparatus allowing a connection relationship between input RF channels and output RF channels to be controlled by a smaller number of switch elements are provided. The RF coil device includes multiple coil segments and a multi-selection switch. Input terminals of the multi-selection switch are each connected to a different coil segment. An output terminal of the multi-selection switch leads to an RF output channel. A control terminal of the multi-selection switch is used to receive a control signal so as to select a coil segment for connection to the output terminal. Multiple coil segments connected to the input terminals are not in consecutive positions, and the number of coil segments by which any two of the multiple coil segments are spaced apart is no fewer than the maximum number of coil segments required for one MRI imaging less 1. The MRI apparatus includes the RF coil device. | 08-29-2013 |
20130221968 | ANTENNA DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE - There is provided a technique for suppressing increase of SAR without sacrificing sensitivity in RF coils used in MRI apparatuses. The present invention provides an antenna device comprising a sheet-shaped conductor and a ribbon-shaped conductor disposed on the subject side with respect to the sheet-shaped conductor with a predetermined distance from the sheet-shaped conductor. The ribbon-shaped conductor has a meandering shape, and is adjusted so as to resonate at transmission and reception frequencies, and it is constituted so that distance to the sheet-shaped conductor becomes smaller at both end part thereof along the static magnetic field direction compared with the distance to the sheet-shaped conductor at the center thereof. Moreover, the ribbon-shaped conductor is constituted so as to have a smaller width, as the distance to the sheet-shaped conductor becomes smaller. | 08-29-2013 |
20130229183 | Cylindrical Gradient Coil Arrangement for a Magnetic Resonance Device - A cylindrical gradient coil arrangement is provided for a magnetic resonance device. The arrangement includes at least one conductive structure that forms at least one gradient coil and a cooling device that uses a cooling fluid to cool the at least one conductive structure. The arrangement includes an outer carrier structure and an inner carrier structure. The outer carrier structure includes two tubular, coaxial outer sections with different diameters. The inner, tubular carrier structure is arranged between and coaxially with the outer sections. The conductive structure is placed on the inner carrier structure. The inner carrier structure is spaced from the outer sections by a clearance. The clearance forms a cooling channel through which the cooling fluid of the cooling device may flow. The inner carrier structure is fastened to the outer carrier structure at least in a point-by-point manner. | 09-05-2013 |
20130234714 | Radio Frequency Coil Device and Magnetic Resonance Imaging System - An RF coil device and an MRI system are provided. The RF coil device includes m coil elements, where m is an integer greater than 1. The RF coil device also includes an RF switch control unit including n output terminals and m input terminals connected to the m coil elements, respectively, where n is an integer greater than or equal to 1 and less than m. The RF coil device includes a decoder for outputting a control signal to the RF switch control unit according to a received control command. The RF switch control unit connects each of not more than n input terminals to a different output terminal according to the control signal. | 09-12-2013 |
20130234715 | MAGNETIC RESONANCE IMAGING APPARATUS - In a magnetic resonance imaging apparatus according to an embodiment, a transmitting coil applies a radio-frequency magnetic field to a subject placed in a static magnetic field. A receiving coil receives a magnetic resonance signal emitted from the subject owing to an application of the radio-frequency magnetic field. A balun is connected to the receiving coil, and suppresses an unbalanced current induced in the receiving coil. An overheat protection circuit indicates that the balun is abnormal when a temperature of the balun exceeds a temperature threshold. An imaging control unit stops imaging when the overheat protection circuit indicates an abnormality of the balun. | 09-12-2013 |
20130241556 | DETUNING APPARATUS FOR A RECEIVE COIL FOR A MAGNETIC RESONANCE DEVICE INCLUDING A NUMBER OF COIL ELEMENTS - A detuning apparatus for a receive coil for a magnetic resonance device includes a number of coil elements. The coil elements may be selectively connected to a receive channel of a data processing apparatus by way of a switching apparatus. Each of the coil elements includes at least one detuning assembly such as, for example, a PIN diode that may be switched between a detuning state and a receive state by way of a continuous switching signal. A controller is provided to switch the switching apparatus and to generate the switching signals. The detuning apparatus has first diplexers connected upstream of the switching apparatus for injecting switching signals for switching the detuning assembly for coil elements to be detuned dynamically. The detuning apparatus also includes detuning modules for each of the coil elements to switch the detuning assembly to the detuning state if there is no switching signal present. | 09-19-2013 |
20130241557 | MAGNETIC RESONANCE COIL WITH OVERLAPPING COIL ELEMENTS - A magnetic resonance coil for transmitting and/or receiving magnetic resonance signals is provided. The magnetic resonance coil includes at least two overlapping coil elements. Coil conductors of the at least two overlapping coil elements intersect in intersection regions and are arranged on a support. Mutually overlapping coil elements of the at least two overlapping coil elements are arranged on different sides of the support. The support is formed from at least three layers of a support material. A cavity that is filled with air or a filler material, the dielectric constant of the filler material being lower than the dielectric constant of the support material, is provided in the intersection regions in a middle layer of the at least three layers. | 09-19-2013 |
20130241558 | Magnetic Resonance Tomograph with Cooling Device for Gradient Coils - A magnetic resonance tomography device includes at least three coil layers. The at least three coil layers are each operable to generate a gradient magnetic field in one of three directions. One cooling layer is arranged between a first and a second of the at least three coil layers. Another cooling layer is arranged between the second and a third of the at least three coil layers. | 09-19-2013 |
20130249558 | Electronic interface for NMR receiver resonators - An electronic interface (10) between a pure NMR receiver resonator (RO) and a preamplifier is characterized in that one or more control diodes (D | 09-26-2013 |
20130249559 | Multi-Layer Cushion for Optimum Adjustment to Anatomy and for Susceptibility Adjustment - A shim cushion for a magnetic resonance tomography system includes at least two layers. A first layer of the at least two layers includes both a higher deformability and also a lower susceptibility than a second layer of the at least two layers. | 09-26-2013 |
20130249560 | MAGNETIC RESONANCE IMAGING APPARATUS - According to one embodiment, an MRI apparatus includes a data acquisition system and a control system. The data acquisition system acquires MR signals from a subject. The control system acquires the MR signals by controlling the data acquisition system to generate image data. The data acquisition system has a WB coil, an RF coil and a breaker circuit. The WB coil applies the RF magnetic field to the imaging area. The RF coil applies the RF magnetic field to the imaging area when an RF pulse has been applied from the control system through a connector. The RF coil is set inside the WB coil. The breaker circuit electrically breaks a part of a circuit constituting the RF coil when the connector of the RF coil has been disconnected to the control system. | 09-26-2013 |
20130257432 | SLOW MAGIC ANGLE SPINNING NUCLEAR MAGNETIC RESONANCE DEVICE AND PROCESS FOR METABOLOMICS PROFILING OF TISSUES AND BIOFLUIDS - A slow Magic-Angle Spinning NMR device and method are detailed that provide high resolution and high sensitivity metabolic profiling of biological samples. A new | 10-03-2013 |
20130257433 | Magnetic Resonance Tomography Apparatus - A magnetic resonance tomography apparatus includes a receiving device having a number of magnetic resonance receive antennas for receiving a magnetic resonance signal in response to a radio frequency signal transmitted at a magnetic resonance frequency. A respective magnetic resonance receive antenna is connected to a parametric mixer. A receive circuit formed hereby is provided inside the cryostat and is coupled via a contactless communication interface to an evaluation circuit provided outside the cryostat. The evaluation circuit includes a local oscillator device for generating an auxiliary signal at an auxiliary frequency. The auxiliary signal is transmitted via the contactless communication interface to the receive circuit. The receive circuit is configured such that a mixed signal having a mixed frequency is generated via the parametric mixer from the auxiliary signal and the magnetic resonance signal and transmitted via the contactless communication interface to the evaluation circuit. | 10-03-2013 |
20130265055 | System for emulating nuclear magnetic resonance well logging tool diffusion editing measurements on a bench-top nuclear magnetic resonance spectrometer for laboratory-scale rock core analyis - A laboratory NMR methodology (and corresponding laboratory apparatus) defines a sample volume. The method stores downhole tool data corresponding to a hydrocarbon-bearing sample collected from a given subsurface formation. The downhole tool data includes parameters pertaining to magnetic fields used by a downhole tool during a suite of NMR measurements of the given subsurface formation. The sample is positioned in the sample volume of the laboratory apparatus, which applies a static magnetic field in the sample volume. Furthermore, the laboratory apparatus applies a suite of NMR measurements to the sample volume to thereby determine a property of the sample. The NMR measurements of the suite each include a pulse sequence of oscillating magnetic field in conjunction with a pulsed-mode gradient field. The pulsed-mode gradient field is based on the stored downhole tool data corresponding to the sample. A laboratory NMR methodology for optimizing downhole NMR measurements is also described. | 10-10-2013 |
20130271143 | Reduction of Coupling Effects Between Coil Elements of a Magnetic Resonance Coil Arrangement - A magnetic resonance coil arrangement for a magnetic resonance device includes at least two coil elements that may be read and/or controlled via an amplifier, and a matching circuit for power and/or noise matching between the at least two coil elements and the amplifier. Components of the matching circuit are dimensioned for wideband matching to a frequency band. The frequency band is limited by outermost relevant coupling modes that are displaced from the resonant frequency. The coupling modes occur due to the interaction of a coil element with at least one adjacent coil element. | 10-17-2013 |
20130271144 | Magnetic-Resonance Transceiver-Phased Array that Compensates for Reactive and Resistive Components of Mutual Impedance between Array Elements and Circuit and Method Thereof - There is provided a novel method and circuit of compensating for cross-talk between pairs of adjacent array elements of a transceiver phased array and double-tuned transceiver arrays for a magnetic resonance system using a resonant inductive decoupling circuit. The geometry and size of the resonant inductive decoupling circuit allows for the decoupling circuit to compensate for the cross-talk between array elements, including the reactive and resistive components of the mutual impedance while being sufficiently small to not distort a RF magnetic field of the array elements produced within a sample. | 10-17-2013 |
20130271145 | APPARATUS AND METHOD FOR CANCELING MAGNETIC FIELDS - Provided are an apparatus and a method for canceling magnetic fields. The apparatus includes a magnetic field canceling coil disposed adjacent to an inner wall of a magnetic shield room to surround the entire inner space or a portion of an inner space of the magnetic shield room; and a magnetic field canceling coil driver to supply current to the magnetic field canceling coil. The magnetic field canceling coil cancels a prepolarization magnetic field established on the wall of the magnetic shield room by a prepolarization coil disposed in the center of the magnetic shield room to minimize magnetic interference caused by the magnetic shield room. | 10-17-2013 |
20130278266 | CIRCULATOR - A circulator suitable for use in an external field, particularly of a magnetic resonance apparatus, has a planar ferrite structure. Instead of a permanent magnet, a field conducting device is provided that is designed to strengthen or weaken an external field, and/or at least one electromagnet is provided for generating an operating field. The operating field proceeds perpendicularly through the ferrite structure. | 10-24-2013 |
20130278267 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - According to one embodiment of the present invention, an MRI apparatus ( | 10-24-2013 |
20130278268 | Shielding for an Electronic Circuit - Shielding for an electronic circuit includes at least one substrate. A metal structure is disposed on at least one side of the at least one substrate. The metal structure includes a number of non-contiguous part areas. Adjacent part areas that are disposed on a same side of the substrate are spaced apart from one another by a boundary line running in a serpentine shape. | 10-24-2013 |
20130300418 | MR Antenna With Compensation for Variable Distance to Shield - A whole-body coil for a magnetic resonance tomography device includes one or more compensation capacitors between a high-frequency antenna and an RF shield. The one or more compensation capacitors each have variable capacitance caused by a variation in a distance of the RF shield to the high-frequency antenna. | 11-14-2013 |
20130314088 | MULTI-CHANNEL COIL ARRANGEMENT - A multi-frequency coil array arrangement can be provided. For example, a plurality of radio frequency coil arrangements can have a first coil arrangement(s) resonant at a single first frequency and a second coil arrangement(s) resonant at a single second frequency which is lower than the first frequency | 11-28-2013 |
20130314089 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus according to an embodiment includes a static magnetic field magnet, a gradient coil, a bore tube and a sealed space forming unit. The gradient coil is formed to be approximately cylindrical, arranged in a cylinder of the static magnetic field magnet, and adds a gradient magnetic field to the static magnetic field. The bore tube is formed to be approximately cylindrical and arranged in the cylinder of the gradient coil. The sealed space forming unit forms a sealed space enclosing the gradient coil between an inner circumferential side of the static magnetic field magnet and an outer circumferential side of the bore tube. At least a part of at least one of the side ends of the gradient coil does not make contact with the sealed space. | 11-28-2013 |
20130314090 | Magnetic resonance imaging apparatus - In order to improve image quality, a technique for obtaining information for eliminating distortions of the k-space in the readout direction and the phase encoding direction caused by the waveform distortion of the gradient magnetic field pulse is provided. A pulse sequence for the main scan is used to repeatedly measure echoes with changing the time integral value of the dephasing pulse for the readout gradient magnetic field. In the above measurement, the phase encoding pulse is not made zero, but two-dimensional data are measured in the same manner as that of the main scan. By using the measured two-dimensional data, correction information for eliminating distortions of the k-space in the readout direction and the phase encoding direction caused by the waveform distortion of the gradient magnetic field pulse is calculated in each of the readout direction and the phase encoding direction. | 11-28-2013 |
20130314091 | RF COIL AND MAGNETIC RESONANCE IMAGING DEVICE - To provide a technique for sufficiently eliminating magnetic coupling between RF coils and improving image quality when a multi-element multi-tuned RF coil is used as a receive RF coil for an MRI device. In the invention, each of RF coils which constitute a multi-element multi-tuned RF coil which is used as a receive RF coil for an MRI device is provided with an inter-coil magnetic coupling prevention circuit which resonates at each frequency to which each RF coil is tuned and provides a high impedance. The inter-coil magnetic coupling prevention circuit adjusts an inductor and a capacitor so that both of a circuit on the side of a pre-amplifier viewed from both ends of a signal reception circuit and a circuit on the side of the signal reception circuit viewed from both ends of a serial resonance circuit connected to the pre-amplifier resonate at a plurality of frequencies to which the respective RF coils are tuned. | 11-28-2013 |
20130328565 | RADIO-FREQUENCY TRAPS AND METHODS OF COMMON-MODE ENERGY DAMPING - Radio-frequency (RF) traps and methods of common-mode energy damping are provided. One RF trap includes a body and a shutter holder rotatably coupled within the body, wherein the shutter holder is configured to rotate within the body about a longitudinal axis. The RF trap further including a magnetic flux shutter coupled to the shutter holder, wherein the magnetic flux shutter rotates within the body with the shutter holder to align the magnetic flux shutter at an angle within the body. | 12-12-2013 |
20130335086 | DISTRIBUTED CAPACITANCE RADIO FREQUNCY (RF) COIL AND MAGNETIC RESONANCE IMAGING SYSTEM INCLUDING THE SAME - A radio frequency (RF) birdcage coil includes a first distributed capacitance end ring, a second distributed capacitance end ring, and a plurality of rungs connected between the first and second end rings, wherein at least one of the first and second distributed capacitance end rings includes a substrate having a first side and a second side, a first plurality of conductors formed on the first side, a second plurality of conductors formed on the second side, and an insulating material deposited on the first side such that the insulating material substantially covers the first plurality of conductors. | 12-19-2013 |
20130335087 | RADIO FREQUNCY (RF) BODY COIL AND METHOD FOR TUNING AN RF BODY COIL FOR MAGNETIC RESONANCE IMAGING - A radio frequency (RF) body coil includes a first end ring, a second end ring, a plurality of rungs connected between the first and second end rings, at least one shim holder coupled to the first end ring, and a RF shim configured to be at least partially inserted within the shim holder, the RF shim being repositionable within the shim holder to vary an operational frequency of the RF body coil. A magnetic resonance imaging system and a method of tuning the RF body coil are also described. | 12-19-2013 |
20130335088 | GRADIENT COIL DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE - A gradient coil device includes a major axis gradient coil, having an ellipse in a cross section generating a gradient magnetic field inclined in a major axis direction of the ellipse at a magnetic field space; and a minor axis gradient coil, having an ellipse in a cross section generating a gradient magnetic field inclined in a minor axis direction of the ellipse at the magnetic field space. A length of the minor axis field coil in the center axis direction is shorter than a length of the major axis gradient coil in the center axis direction. A maximum value of a residual magnetic field generated by the minor axis gradient coil at a space outside the magnetic field space is equal to or smaller than a maximum value of a residual magnetic field generated by the major axis gradient coil at a space outside the magnetic field space. | 12-19-2013 |
20140002084 | MAGNETIC RESONANCE IMAGING SYSTEMS FOR PARALLEL TRANSMIT, RECEIVE AND SHIM AND METHODS OF USE THEREOF | 01-02-2014 |
20140002085 | Automatic Detuning of Non-Connected Transceiver Coils for MRI | 01-02-2014 |
20140002086 | Local Coils | 01-02-2014 |
20140002087 | Method for Simultaneous Transmission of High-Frequency Transmission Signals via a Common High-Frequency Line | 01-02-2014 |
20140009160 | MRT-RF Push Pull Power Modules - A circuit arrangement including a plurality of amplifier stages to amplify an electrical RF signal for a magnetic resonance tomography device is provided. The plurality of amplifier stages is arranged on at least one circuit board. A circuit board of the at least one circuit board surrounds a cooling pipe. | 01-09-2014 |
20140021953 | METHOD FOR ELECTROMAGNETIC SHIELDING FOR A MAGNETIC RESONANCE SYSTEM AND CORRESPONDINGLY SHIELDED DEVICE - In one embodiment, an electromagnetic shielding of a device is disclosed for a magnetic resonance system. The device is shielded via a conductive layer which surrounds an inner part of the device in such a manner that an electrical current path completely around the inner part can be formed in the layer. The layer is arranged between a housing of the device, surrounding the inner part, and the inner part. In another embodiment, an electromagnetic shielding of a device is disclosed for a magnetic resonance system, wherein the device is shielded via a conductive layer which surrounds the device in such a manner that an electrical current path completely around the device is formed. In this situation, the device having the layer is mounted by way of projections on the magnetic resonance system. Each projection has a contact surface with the layer, at which the respective projection contacts the layer. | 01-23-2014 |
20140021954 | MAGNETIC RESONANCE IMAGING APPARATUS AND RF COIL DEVICE - According to one embodiment, an MRI apparatus ( | 01-23-2014 |
20140021955 | Gradient Coil with Precisely Positioned Coil Windings - A method for producing at least one saddle coil for a gradient coil layer for a magnetic resonance tomography system is provided. At least one half cylinder-shaped, premolded saddle coil is arranged between an inner shell and an outer shell of a casting apparatus. The shells of the casting apparatus are closed, and the space between the shells is filled with a casting compound. | 01-23-2014 |
20140021956 | MAGNETIC RESONANCE IMAGING APPARATUS, BED DEVICE AND RF COIL DEVICE - In one embodiment, an MRI apparatus ( | 01-23-2014 |
20140035585 | Shim Coil Arrangement with Integrated Spacers - A shim coil arrangement for a magnetic resonance tomography system includes one or more spacers. | 02-06-2014 |
20140043029 | Activation of Transmit/Receive Arrays for Decoupling During Transmission - A system for electromagnetic excitation of an object under examination during magnetic resonance tomography includes a radio frequency (RF) device for generating a radio-frequency signal and a plurality of antennas for emitting the radio-frequency signal. A signal connection exists between the output of the RF device and the plurality of antennas. A source impedance of the signal connection to the output of the RF device at a connection point of the plurality of antennas is significantly higher than the impedance of the plurality of antennas at the connection points, so that the plurality of antennas are fed in a current source feed mode if a radio-frequency signal is present. | 02-13-2014 |
20140043030 | METHOD FOR ADJUSTING MAGNETIC RESONANCE IMAGING APPARATUS AND SUPERCONDUCTIVE MAGNET EXCITATION DOCK - An adjustment method of a magnetic resonance imaging apparatus includes: a cooling and excitation step in which work of transporting a superconducting magnet to a facility different from a facility where the superconducting magnet is to be installed, cooling a superconducting coil of the superconducting magnet with a refrigerant, and supplying a current from an external power supply for excitation is repeated until a predetermined rated current flows; a demagnetization and transportation step of demagnetizing the superconducting coil and transporting the superconducting magnet to the facility where the superconducting magnet is to be installed in a state where the superconducting coil is cooled by the refrigerant; and an installation step of installing the superconducting magnet in the facility where the superconducting magnet is to be installed and supplying a predetermined rated current from an external power supply to the superconducting coil in order to excite the superconducting coil. | 02-13-2014 |
20140049259 | RESONANT MAGNETIC RING ANTENNA - A resonant magnetic ring antenna which includes a dielectric substrate having opposing first and second sides, a first and second ring elements disposed upon the opposing first and second sides of the substrate in a corresponding location, the first and second ring elements each comprising a trace having a spiral configuration with an outer radius, an inner radius, a spacing, and a number of turns, the resonant magnetic ring antenna being configured to concentrate radio frequency (RF) electromagnetic fields over a controlled volume at a specified distance from an imaging device in which it is incorporated. | 02-20-2014 |
20140055138 | NMR Detection Module - An NMR (nuclear magnetic resonance) detection module (such as an NMR probe) mounted in a vacuum vessel permits a transmit/receive coil to be cooled efficiently and to be placed closer to a sample container. The NMR detection module includes a core module (detection module) ( | 02-27-2014 |
20140055139 | NMR Detection Probe - A cooled NMR detection probe including a detection coil and an internal structure ( | 02-27-2014 |
20140055140 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus includes an imaging unit configured to carry out magnetic resonance imaging of a patient using a transmitting QD coil that allows at least one of phase and amplitude of a radio-frequency transmit pulse on at least one input channel of the transmitting QD coil to be adjusted independently of each other, and an adjustment unit arranged to adjust at least one of the phase and the amplitude of the radio-frequency transmit pulse according to imaging conditions. | 02-27-2014 |
20140062484 | MAGNETIC RESONANCE IMAGING (MRI) APPARATUS AND MANUFACTURING METHOD THEREOF - A magnetic resonance imaging (MRI) apparatus and method of manufacture including shims provided in outermost or an innermost part of a gradient coil unit. The MRI apparatus includes: a static coil unit configured to form a static field in a subject; and a gradient coil unit configured to form a gradient field in the static field, wherein the gradient coil unit includes one or more shims in an outermost part or an innermost part. | 03-06-2014 |
20140062485 | MAGNETIC RESONANCE IMAGING APPARATUS AND RADIO COMMUNICATION DEVICE - According to one embodiment, an MRI apparatus ( | 03-06-2014 |
20140062486 | SPLIT GRADIENT COIL AND HYBRID SYSTEMS USING SAME - A generally cylindrical set of coil windings includes primary coil windings and shield coil windings at a larger radial position than the primary coil windings, and an arcuate or annular central gap that is free of coil windings, has an axial extent of at least ten centimeters, and spans at least a 180° angular interval. Connecting conductors disposed at each edge of the central gap electrically connect selected primary and secondary coil windings. In a scanner setting, a main magnet is disposed outside of the generally cylindrical set of coil windings. In a hybrid scanner setting, an annular ring of positron emission tomography (PET) detectors is disposed in the central gap of the generally cylindrical set of coil windings. | 03-06-2014 |
20140070810 | NUCLEAR QUADRUPOLE RESONANCE SYSTEM AND METHOD OF USING THE SAME - A nuclear quadrupole resonance (NQR) sensor assembly includes an active sensor coil configured to transmit radiofrequency (RF) signals to an object of interest and receive return RF signals from the object of interest to generate sensor signals substantially representative of the return signals. The at least one reference coil is configured to receive environmental RF signals to generate reference signals at least partially representative of the environmental RF signals. The at least one reference coil is co-located with the active sensor coil. The active sensor coil and the at least one reference coil are in communication with a correction unit configured to remove interference components from the sensor signals using the reference signals. | 03-13-2014 |
20140070811 | MAGNETIC RESONANCE IMAGING APPARATUS - In one embodiment, an MRI apparatus ( | 03-13-2014 |
20140070812 | IMAGE DIAGNOSIS APPARATUS AND POWER CONTROL METHOD OF AN IMAGE DIAGNOSIS APPARATUS - In one embodiment, the image diagnosis apparatus ( | 03-13-2014 |
20140077813 | INTRA-BLADE FILTER FOR MOTION CORRECTED MAGNETIC RESONANCE DATA - In an embodiment, a method includes processing magnetic resonance (MR) data according to a process including applying a density filter to blades of k-space data rotated about a section of k-space. Each blade may include a first set of encode lines weighted in a first signal weighting and a second set of encode lines weighted in a second signal weighting. The density filter may be configured to preferentially weight each blade in the first signal weighting to produce blades of weighted k-space data. | 03-20-2014 |
20140084929 | MAGNETIC RESONANCE IMAGING (MRI) APPARATUS AND MANUFACTURING METHOD THEREOF - A magnetic resonance imaging (MRI) method and apparatus in which conductors are installed in the space between a static coil unit and a gradient coil unit to eliminate asymmetry of eddy current induced in the static coil unit. The structure permits a symmetrical distribution of eddy current when the concentric arrangement of the static coil unit and gradient coil unit has deviated. The MRI apparatus includes: a static coil unit configured to form a static field in a subject; a gradient coil unit configured to form a gradient field in the static field; and one or more conductors installed in the space between the static coil unit and the gradient coil unit, and configured to symmetrically distribute eddy current induced in the static coil unit. | 03-27-2014 |
20140091801 | Decoupling of Split Ring Resonators in Magnetic Resonance Tomography - An arrangement includes a plurality of split ring resonators on a planar substrate. Each split ring resonator of the plurality of split ring resonators includes two mutually parallel ring structures of a metal conductor element spaced apart by the substrate. The two mutually parallel rings structures are respectively separated by at least one gap. At least two split ring resonators of the plurality of split ring resonators are positionable relative to one another such that the separated ring structures may be reciprocally guided through a gap of the respective other ring structures and interlock. Overlap regions may be produced by common ring structure inner surfaces. | 04-03-2014 |
20140091802 | INTERGRATED ELECTRON SPIN RESONANCE SPECTROMETER - An integrated electron spin resonance (ESR) circuit chip includes a chip substrate, a transmitter circuit, and a receiver circuit. The transmitter circuit and receiver circuit are disposed on the chip substrate. The transmitter circuit includes an oscillator circuit configured to generate an oscillating output signal and a power amplifier (PA) circuit configured to generate an amplified oscillating output signal based on the oscillating output signal. The receiver circuit receives an ESR signal from an ESR probe. The receiver circuit includes a receiver amplifier circuit configured to generate an amplified ESR signal based on the received ESR signal, a mixer circuit configured to receive the amplified ESR signal and to down-convert the amplified ESR signal to a baseband signal, and a baseband amplifier circuit configured to generate an amplified baseband signal based on the baseband signal. | 04-03-2014 |
20140097845 | Dynamic Image Reconstruction with Tight Frame Learning - A computer-implemented method for learning a tight frame includes acquiring undersampled k-space data over a time period using an interleaved process. An average of the undersampled k-space data is determined and a reference image is generated based on the average of the undersampled k-space data. Next, a tight frame operator is determined based on the reference image. Then, a reconstructed image data is generated from the undersampled k-space data via a sparse reconstruction which utilizes the tight frame operator. | 04-10-2014 |
20140097846 | ACTIVE TRANSMIT ELEMENTS FOR MRI COILS AND OTHER ANTENNA DEVICES, AND METHOD - Apparatus and method that includes amplifiers for transceiver antenna elements, and more specifically to power amplifying an RF (radio frequency) signal using a distributed power amplifier having electronic devices (such as field-effect transistors) that are thermally and/or mechanically connected to each one of a plurality of antenna elements (also called coil elements) to form a hybrid coil-amplifier (e.g., for use in a magnetic-resonance (MR) imaging or spectroscopy machine), and that is optionally adjusted from a remote location, optionally including remotely adjusting its gains, electrical resistances, inductances, and/or capacitances (which controls the magnitude, phase, frequency, spatial profile, and temporal profile of the RF signal)—and, in some embodiments, the components are compatible with, and function in, high fields (such as a magnetic field of up to and exceeding one tesla or even ten tesla or more and/or an electric field of many thousands of volts per meter). | 04-10-2014 |
20140097847 | OPTICAL ANGULAR MOMENTUM INDUCED HYPERPOLARISATION IN INTERVENTIONAL APPLICATIONS - A magnetic resonance spectroscopy assembly includes a magnet to generate a steady magnetic field, an RF transmit/receive antenna to transmit an RF excitation field into an examination region and acquire magnetic resonance signals from the examination region and a magnetic resonance spectrometer coupled to the RF transmit/receive antenna to collect magnetic resonance spectroscopy data from the magnetic resonance signals. An interventional instrument is provided with the assembly. The interventional instruments carries an optical module to generate photonic radiation endowed with orbital optical momentum (OAM). | 04-10-2014 |
20140103931 | HIGH FREQUENCY COIL UNIT AND MAGNETIC RESONANCE IMAGING APPARATUS - The present invention is directed to an elliptical birdcage coil which reduces time and effort upon manufacturing and production cost, with less variations in performance. There is provided a high frequency coil unit made up of the elliptical birdcage coil having plural capacitors arranged at least on either of the ring conductors and the rung conductors, the capacitance of the plural capacitors being uniform with respect to each conductor type on which the capacitors are placed. In this elliptical birdcage coil, a value of inductance and arrangement of the ring conductors and the rung conductors are determined in such a manner that the capacitance of the capacitors becomes identical with respect to each conductor type on which the capacitors are arranged. | 04-17-2014 |
20140117989 | PROTECTIVE COVER FOR MRI - A protective cover for an open bore MRI is disclosed. The cover comprises a semi-permeable barrier, MRI shielding, and physical shielding; is at least partially transparent; and it comprises fluid connection means for providing a fluid connection between an inner open bore of said open bore MRI and an environment external to said open bore MRI. | 05-01-2014 |
20140117990 | Body Coil for Magnetic Resonance Imaging - A body coil includes a first end ring and a second end ring provided at two ends thereof. The first end ring and the second end ring are connected to each other with a plurality of legs. The first end ring or the second end ring has a structure with the current flow width in a direction parallel to the axis thereof being greater than that in a direction perpendicular to the axis thereof. Since the effective action width of the current is increased in the axial direction and the centralized flow of the current in the end ring is reduced, the local specific absorption rate of radio frequency induced by the magnetic field is therefore reduced. | 05-01-2014 |
20140125341 | GRADIENT COIL MOUNTING UNIT AND MAGNETIC RESONANCE IMAGING APPARATUS HAVING THE SAME - A gradient coil mounting unit for mounting a gradient coil module in a chamber of a magnetic resonance imaging (MRI) apparatus includes: vibration-proof pads provided on first and second edges of an inner surface of the chamber; and fixing taps provided on first and second edges of an outer surface of the gradient coil module. At least one vibration-proof pad has a shape that is complementary to a shape of a corresponding fixing tap. | 05-08-2014 |
20140125342 | Magnet configuration with a superconducting magnet coil system and a magnetic field forming device for magnetic resonance spectroscopy - A magnet assembly has a field shaping device (P | 05-08-2014 |
20140139221 | Electrical circuit in the magnetic field of an MR apparatus - An electrical circuit with one or more semiconductor components ( | 05-22-2014 |
20140139222 | Connector and Medical Equipment - A connector and medical equipment are provided. The connector includes at least one framework and at least one fastening structure. The at least one connector is used to connect a main body and a housing. The at least one framework is arranged along the outside of the main body. The fastening structure is located on the at least one framework. The at least one fastening structure is used to connect the housing. | 05-22-2014 |
20140145722 | BIRDCAGE-TYPE HIGH-FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING APPARATUS - In order to allow the capacitances of a plurality of resonance capacitor elements inserted in a ring-shaped conductor element of a birdcage-type high-frequency coil to be collectively adjusted in a balanced manner without the need to perform adjustment separately, there is provided a birdcage-type high-frequency coil including two ring-shaped conductor elements in which a plurality of resonance capacitor elements are inserted in series and a plurality of linear conductor elements electrically connected to the two ring-shaped conductor elements. An adjustment belt to change the apparent capacitances of the plurality of resonance capacitor elements collectively is slidably disposed on the outer periphery of at least one of the two ring-shaped conductor elements with a dielectric member interposed therebetween. | 05-29-2014 |
20140159727 | PHASED ARRAY RF COIL MODULE AND MAGNETIC RESONANCE IMAGING APPARATUS USING THE SAME - A phased array RF coil module and an imaging apparatus using the same can receive a magnetic resonance signal generated from a target object at high receive sensitivity and improve a signal to noise ratio. The phased array RF coil module includes at least one first phased array RF coil unit generating a magnetic field having a component horizontal with the surface of a target object and a second phased array RF coil unit formed horizontally with the surface of the target object and generating a magnetic field having a component vertical to the surface of the target object. The imaging apparatus using the phased array RF coil module is a magnetic resonance imaging apparatus. | 06-12-2014 |
20140159728 | POSITION MARKER FOR USE IN AN MRI APPARATUS - A fiducial position marker ( | 06-12-2014 |
20140167757 | VACUUM FEED-THROUGH ASSEMBLY - A vacuum feed-through assembly and a method for manufacturing the same including a conductor having a threaded outer diameter end, a plastic seal having a threaded inner diameter matching the threaded outer diameter end of the conductor, and an epoxy to epoxy bond the threaded inner diameter of the plastic seal to the threaded outer diameter end of the conductor. | 06-19-2014 |
20140167758 | Multi-Channel Endorectal Coils and Interface Devices Therefor - An intracavity probe for use with a magnetic resonance system includes: a pair of coil loops arranged in a phased array configuration; a pair of decoupling circuits; a pair of output cables; and a spacer material positioned adjacent to an anterior surface of the coil loops. Each coil loop has a drive capacitor and a tuning capacitor. Each decoupling circuit is connected across the tuning capacitor of one of the coil loops. Each output cable is connected at a first end thereof across the drive capacitor of one of the coil loops such that each of the drive capacitors is provided with a separate ground. The spacer material assures a predetermined distance between the pair of coil loops and the region of interest, which thereby reduces intensity of the magnetic resonance signals in proximity to the coil loops, maintains SNR at depth within the region of interest and reduces artifacts. | 06-19-2014 |
20140167759 | NMR BOREHOLE LOGGING DEVICE AND METHOD OF USE - This disclosure provides systems, methods, and apparatus related to depth well logging. In one aspect, an apparatus includes a radio frequency (RF) coil and a magnetic field sensing device. The apparatus is configured to be positioned in a first magnetic field. The first magnetic field polarizes nuclear spins of species in a detection region proximate the apparatus. The apparatus generates a second magnetic field for a time period with the RF coil to excite the nuclear spins of the species in the detection region. Then, the apparatus measures electromagnetic radiation, using the magnetic field sensing device, generated by the species as a result of the excitation of the nuclear spins. | 06-19-2014 |
20140167760 | SYSTEM FOR COMMUNICATION USABLE BY MAGNETIC RESONANCE AND OTHER IMAGING DEVICES - An imaging apparatus and a method of controlling the same are disclosed. The imaging apparatus control method includes generating a pulse signal to an imaging unit, the imaging unit imaging an object to acquire an image signal of the object, generating an antiphase pulse signal based on the generated pulse signal, the antiphase pulse signal having an opposite phase to that of the pulse signal, and controlling a wireless communication unit based on the antiphase pulse signal, the wireless communication unit transmitting the image signal using a wireless communication network. | 06-19-2014 |
20140167761 | MAGNETIC RESONANCE MEASURING EQUIPMENT - A magnetic resonance measuring equipment capable of detecting a nuclear magnetic resonance signal with a higher sensitivity and a higher resolution in comparison with related magnetic resonance measuring equipment. The magnetic resonance measuring equipment modulates a nuclear magnetic resonance signal by applying a vibration (sonic wave) of a known frequency, which is higher than the frequency of the nuclear magnetic resonance signal, to an examination object, and detects the modulated signal by performing lock-in detection, which makes it possible that the magnetic resonance measuring equipment detects the nuclear magnetic resonance signal with a high sensitivity. In addition, after irradiating a local area of the object with an ultrasonic wave, and modulating the nuclear magnetic resonance signal derived from the irradiated local area, the magnetic resonance measuring equipment can detect the nuclear magnetic resonance signal with a high resolution. | 06-19-2014 |
20140167762 | COIL DEVICE AND MAGNETIC RESONANCE IMAGING APPARATUS - A coil device ( | 06-19-2014 |
20140176137 | Adapter, Coil, and Magnetic Resonance Imaging System - An adapter includes a control circuit, a control signal interface, a first input signal interface, a second input signal interface, and a first output signal interface. The control signal interface receives a tuning/detuning signal, and the control circuit switches, according to the tuning/detuning signal, the first input signal interface and the second input signal interface to be in conduction with the first output signal interface. | 06-26-2014 |
20140176138 | GRADIENT MAGNETIC FIELD COIL DEVICE, ADJUSTMENT METHOD THEREFOR, AND MAGNETIC RESONANCE IMAGING APPARATUS - In a gradient magnetic field coil device including: a plurality of main coils generating in an imaging region of a magnetic field resonance imaging device a magnetic field distribution in which an intensity linearly inclines; and a plurality of shield coils, arranged on an opposite side of the imaging region across the main coils, suppressing residual magnetic field generated by the main coils on the opposite side. The plurality of main coils and the plurality of shield coils are connected in series. The device further includes a plurality of current adjusting devices, connected to the shield coils in parallel, independently adjusting currents flowing through the shield coils, respectively, to enhance symmetry of the residual magnetic field. The gradient magnetic field coil device is provided which can suppress generation of eddy current magnetic field even if there is a relative position deviation between the main coils and shield coils. | 06-26-2014 |
20140184226 | SYSTEM AND APPARATUS FOR ACTIVE HIGH ORDER SHIMMING - A gradient coil apparatus for a magnetic resonance imaging (MRI) system includes an inner gradient coil assembly having at least one inner gradient coil and an outer gradient coil assembly disposed around the inner gradient coil assembly and having at least one outer gradient coil. A matrix shim coil is positioned at a radius within the gradient coil apparatus and is configured to provide high order shimming. | 07-03-2014 |
20140191757 | Radiofrequency Coils - The present disclosure provides a method for producing a rigid, shaped, non-planar radiofrequency coil including:
| 07-10-2014 |
20140191758 | Transmit Antenna Selector and Magnetic Resonance Imaging System - A transmit antenna selector includes a control circuit, a body coil signal output interface, a local coil signal output interface, a radio-frequency signal input interface, and a dummy load. The control circuit includes a plurality of diodes. The control circuit electrically connects, according to a control signal and via the plurality of diodes, the radio-frequency signal input interface with the body coil signal output interface, with the local coil signal output interface, or with the dummy load. | 07-10-2014 |
20140197838 | Setting Apparatus - A setting apparatus configured for setting and/or adjusting an attachment position of an attachment element for attaching a housing cover of a magnetic resonance apparatus in relation to a magnetic center of a magnet unit is provided. The setting apparatus includes a base plate unit, an attachment unit for attaching the base plate unit to the magnet unit and a setting unit. The setting unit includes at least two laser beam units for marking the attachment position of the attachment element for attaching the housing cover to the magnet unit. | 07-17-2014 |
20140210475 | Local Coil and Magnetic Resonance Imaging System - A local coil and a magnetic resonance imaging system are provided. The local coil includes an antenna part, an adjustment part and a transmission part. The antenna part includes a first capacitor connected in series for adjusting a frequency of the antenna part. The adjustment part includes a tuning/detuning diode and is connected in parallel to the first capacitor, and the tuning/detuning diode is used for adjusting tuning and detuning of the antenna part. The transmission part includes a radio-frequency transmission line that connects the antenna part and the adjustment part, and the transmission part provides a phase difference of an odd multiple of 180° between the antenna part and the tuning/detuning diode. | 07-31-2014 |
20140210476 | MAGNETIC RESONANCE IMAGING DEVICE - A device includes: a static magnetic field generating device including static magnetic field generating sources generating a homogeneous magnetic field in a space; gradient magnetic field generating sources superimposing a gradient magnetic field on the homogeneous magnetic field, and conductor rings arranged between the static magnetic field generating sources and the gradient magnetic field generating sources in a pair of arranging regions on both sides in a direction of the homogeneous magnetic field in a region where the homogeneous magnetic field is generated (imaging region), respectively, the conductor rings being separated from each other and making a pair. The conductor rings are mechanically connected to the gradient magnetic field generating device or the static magnetic field generating device. This provides an MRI device 1 capable of reduction in vibration with suppression of the image quality deterioration of the tomographic images. | 07-31-2014 |
20140218034 | MAGNETIC RESONANCE IMAGING APPARATUS AND RF COIL DEVICE - According to one embodiment, an MRI apparatus ( | 08-07-2014 |
20140218035 | MAGNETIC RESONANCE IMAGING APPARATUS AND RF COIL DEVICE - According to one embodiment, an MRI apparatus ( | 08-07-2014 |
20140232407 | MAGNETIC RESONANCE IMAGING APPARATUS AND APPARATUS FOR MEASURING RADIO FREQUENCY OUTPUT FOR THE SAME - An apparatus for measuring radio frequency output for a magnetic resonance imaging apparatus includes a plurality of directional couplers, a comparator, a switcher and a converter. The plurality of directional couplers are different in degree of coupling from each other, and attenuate an RF signal which is generated in an RF signal generator and amplified in an RF power amplifier. The comparator compares input-level information of a signal inputted into the RF power amplifier with a threshold value. The switcher switches to any one of the plurality of the directional couplers based on a result of the comparison so as to output an RF signal by the one directional coupler. The converter performs a digital conversion of the RF signal from the one directional coupler so as to output a digital signal. | 08-21-2014 |
20140239952 | MAGNETIC RESONANCE IMAGING SYSTEM - Provided is a magnetic resonance imaging (MRI) apparatus. The MRI apparatus includes a magnet configured to generate a magnetic field; a magnetic field coil configured to generate a gradient magnetic field and the magnetic field coil is disposed inside the magnet; and a radio-frequency (RF) coil unit comprising RF coil elements and the RF coil unit is disposed inside the magnetic field coil. | 08-28-2014 |
20140239953 | HIGH FREQUENCY MULTIPLE-CHANNEL ANTENNA, PARTICULARLY FOR A NUCLEAR MAGNETIC RESONANCE IMAGING DEVICE - A multiple-channel antenna includes a first loop resonator including a radiating element forming a loop; a second resonator adjacent to the first loop resonator including a radiating element; wherein the radiating element of the first loop resonator has a main surface defined along a first median plane; a secondary surface defined along a second median plane, the secondary surface delimiting an appendix of the radiating element placed facing the second resonator and having an inclination relative to the median plane of the main surface and wherein the second resonator is a linear resonator with a straight radiating element. | 08-28-2014 |
20140239954 | Method and System for Generating Magnetic Field Gradients for an NMR Imaging Machine - Disclosed is a gradient generator system arranged around a volume of interest of axis Oz. The system includes z-gradient coils of axis Oz; z-gradient tubes of axes parallel to the axis Oz including coils arranged in a ring outside the z-gradient coils; x-gradient coils and y-gradient coils of saddle shape arranged around the z-gradient coils; and x and y-gradient tubes of axes parallel to the axis Oz and situated in a ring outside the z-gradient coils, being interposed between the z-gradient tubes, with each of the x and y gradient tubes including coils. | 08-28-2014 |
20140247048 | Zero- & Low-Field Transport Detection System - A sensing apparatus for detecting and determining the magnitude of a static magnetic field has a first set of coils capable of producing a sweeping, quasi static, magnetic field when driven by a direct current and a second set of coils, for magnetic field modulation, positioned between the first set of coils capable of producing a low-frequency (audio), oscillating magnetic field when driven by an oscillating current. The magnetic fields induce a current through the semiconductor device which sampled to identify changes as a function of sweeping, quasi static magnetic field. To create an apparatus for detecting and identifying atomic scale defects in fully processed devices, a radio frequency circuit with a resonant component is added which provides an oscillating electromagnetic field in a direction perpendicular to that of the static magnetic field produced by the first set of coils. | 09-04-2014 |
20140247049 | DIGITAL WAVEFORM SYNTHESIZER FOR NMR PHASE CONTROL - In an RF source, a digital waveform synthesizer comprises a computational module to synchronously determine a desired periodic function, f(θ) within a first bandwidth portion, to which computational result there is combined an injected digits noise increment in an adjustable range of hounded amplitude, specifically selected to average over discontinuities of the DAC transfer characteristic. The combination is effected after passing the injected noise increment through a programmable digital filter forming a composite tuning word having a total bandwidth at a selected Nyquist zone and thence passing the composite timing word through a truncation component to a DAC. The programmable digital filter is constructed to displace the spectral distribution of the injected noise increment to a portion of the total bandwidth remote from the first bandwidth portion. | 09-04-2014 |
20140247050 | RADIO FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING APPARATUS - In a radio frequency coil according to an embodiment, electrical conductors and circuit elements are arranged. The radio frequency coil is configured so that the direction in which two of the electrical conductors forming a ring are connected together by one or more of the circuit elements positioned between the electrical conductors is different from the circumferential direction of the radio frequency coil. | 09-04-2014 |
20140253124 | NMR probe head with variable RF resonant circuit capacitor which can be adjusted in steps via a piezo-electric actuator - An NMR probe head has a capacitor with a dielectric ( | 09-11-2014 |
20140253125 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNET FOR MAGNETIC RESONANCE IMAGING APPARATUS - According to one embodiment, a magnetic resonance imaging apparatus includes an imaging unit and a shield. The imaging unit is configured to perform a magnetic resonance imaging of an object by transmitting a radio frequency signal from a radio frequency coil in a condition that magnetic fields are formed by a gradient coil and a superconducting magnet respectively. The shield is configured to form a gradient magnetic field for the magnetic resonance imaging with the gradient coil and to prevent an ingress of a heat into the superconducting magnet. | 09-11-2014 |
20140253126 | MAGNETIC RESONANCE IMAGING APPARATUS AND ANTENNA DEVICE - In order to provide a technique which can suppress coupling to homogenize the spatial distribution of an RF magnetic field and can improve penetration of the RF magnetic field into the subject, pad-like electric field conductors having a predetermined area are provided outside both ends of a rung conductor as a part of a configuration which forms a loop-like circuit and is driven as an antenna. An antenna device includes a sheet-like conductor, a rung conductor which is arranged at a predetermined distance from the sheet-like conductor, two electric field conductors which are arranged in both end portions of the rung conductor at a predetermined distance from the sheet-like conductor, and connection terminals which are transmission and reception terminals provided in the rung conductor and the sheet-like conductor. The rung conductor and the sheet-like conductor configure a loop circuit which resonates at a preset frequency. | 09-11-2014 |
20140253127 | TRANSVERSE-ELECTROMAGNETIC (TEM) RADIO-FREQUENCY COIL FOR MAGNETIC RESONANCE - The present invention provides a transverse-electromagnetic (TEM) radio-frequency coil ( | 09-11-2014 |
20140266205 | INTRA-BODY MEDICAL DEVICES FOR USE IN MRI ENVIRONMENTS - An MRI-compatible intrabody device includes an elongated flexible shaft having a distal end portion, an opposite proximal end portion, an electrical connector interface configured to be in electrical communication with an MRI scanner, and a tracking coil assembly adjacent the shaft distal end portion. The tracking coil assembly includes a first spool having opposing first and second end walls and a second spool having opposing third and fourth end walls. The second spool is in end-to-end relationship with the first spool such that the second and third end walls are in adjacent, spaced-apart relationship. A tracking coil is wound around the first spool, and a coaxial cable is wound around the second spool. An outer conductor of the coaxial cable is connected to one end of the tracking coil and the inner conductor of the coaxial cable is connected to an opposite end of the tracking coil. | 09-18-2014 |
20140266206 | Radio Frequency Transmit Coil For Magnetic Resonance Imaging System - A radio frequency coil is disclosed that is suitable for use with a magnetic resonance imaging apparatus. The radio frequency coil comprises first and second conductive loops connected electrically to each other by a plurality of conductive rungs. The conductive rungs each include a section that is relatively thin that will result in less attenuation to a radiation beam than other thicker sections of the rungs. Insulating regions are also disposed in areas of the radio frequency coil that are bound by adjacent rungs and the conductive loops. Portions of the insulating regions can be configured to provide a substantially similar amount of attenuation to the radiation beam as the relatively thin sections of the conductive rungs. | 09-18-2014 |
20140266207 | ELECTRICAL LEAD ASSEMBLIES FOR MRI-COMPATIBLE MEDICAL DEVICES AND MRI-COMPATIBLE MEDICAL DEVICES INCORPORATING SAME - An elongate electrical lead assembly that reduces localized heating due to MR scanner-induced currents includes a first elongate electrical lead having a series of alternating single layer coil sections and multi-layer coil sections, a second elongate electrical lead having a series of alternating single layer coil sections and multi-layer coil sections, and a third elongate electrical lead having a coiled section that coaxially surrounds the first and second electrical leads. Each multi-layer coil section of the second electrical lead is coiled around a respective single layer coil section of the first electrical lead, and each single layer coil section of the second electrical lead is coiled around a respective multi-layer coil section of the first electrical lead. | 09-18-2014 |
20140266208 | Systems And Methods For Linear Accelerator Radiotherapy With Magnetic Resonance Imaging - Systems and methods for the delivery of linear accelerator radiotherapy in conjunction with magnetic resonance imaging in which components of a linear accelerator may be placed in shielding containers around a gantry, may be connected with RF waveguides, and may employ various systems and methods for magnetic and radio frequency shielding. | 09-18-2014 |
20140266209 | DETECTION PROCESSING FOR NQR SYSTEM - A system that uses the nuclear quadrupole resonant effect to detect the presence of materials of interest, such as may be excited by radio frequency fields generated within a portal. Transmitted chirp signals may be processed using matching filtering and other signal processing to accurately detect the presence of such materials. | 09-18-2014 |
20140285201 | Actively shielded, cylindrical gradient coil system with passive RF shielding for NMR devices - A gradient coil system has a cylindrical section in a central region, which contains no conductor elements and has a maximum outer radius that is larger than a minimum inner radius of conductor elements of a main gradient coil. An outer radius of this cylindrical section is only insubstantially smaller or equal in size to a minimum inner radius of a shielding coil in this axial range. The free space in the center of the gradient coil system is used to insert a passive RF shield, whose radius in a central region becomes larger over a certain length than its radius in outer regions. The RF shield is constructed from at least three partial sections, which are electrically interconnected. The actively shielded gradient coil system maximizes the volume of the RF region without loss of gradient coil system performance. | 09-25-2014 |
20140285202 | Shielding for a Magnetic Resonance Tomography Device and Magnetic Resonance Tomography Device Equipped Therewith - A shielding for a magnetic resonance tomography device, in the form of a shell of a cylinder, for arrangement radially between a radially outer gradient coil system for generating a magnetic field gradient in an examination space of the MRT device and a radially inner RF coil system for sending and/or receiving RF signals into the examination space and from the examination space, is provided. The shielding includes strips that are arranged on a shielding surface, are electrically conductive and are separated from one another by slits. The strips have respectively angled and/or rounded profile segments to create a two-dimensional pattern of shielding rings on the shielding surface. | 09-25-2014 |
20140292337 | Decoupling of Parallel Transmission Arrays in Magnetic Resonance Imaging - A method of determining a decoupling matrix of a decoupling system for an array of coils of a parallel transmission magnetic resonance imaging (MRI) system includes obtaining impedance matrix data for the array of coils without the decoupling system, determining, based on the impedance matrix data for the array of coils, an objective function representative of deviation from a decoupled operating condition for the array of coils in which the array of coils are decoupled via the decoupling system, and defining, with a processor, a decoupling matrix representative of a set of impedances of the decoupling system with an iterative procedure that optimizes elements of the decoupling matrix to minimize the objective function and reach the decoupled operating condition. | 10-02-2014 |
20140292338 | RADIO FREQUENCY RESONATOR, RADIO FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING APPRATUS - Disclosed herein are a RF resonator, a RF coil, and a magnetic resonance imaging (MRI) apparatus. The RF resonator includes a dielectric substance which is provided, on one surface thereof, with an electric conductor, and at least one conductor line which is installed on another surface of the dielectric substance so as to face the electric conductor and provided with a plurality of open-cut portions which are disposed in a plurality of rows. | 10-02-2014 |
20140292339 | Local Coil System Including an Energy Reception Antenna for Inductively Receiving Energy for the Local Coil System - A local coil system for detecting magnetic resonance (MR) signals in a magnetic resonance tomography (MRT) device includes an energy reception antenna for inductively receiving energy for the local coil system from a magnetic field changing over time with an energy transmission frequency. The energy reception antenna includes a conductor loop running in loop-like fashion from a first loop connection to a second loop connection. At least one path filter that blocks for harmonic frequencies of the energy transmission frequency is arranged over the course of the energy reception path, and/or at least one path filter that blocks for harmonic frequencies of the energy transmission frequency is arranged over the course of an energy reception path leading from the loop connections to a rectifier. | 10-02-2014 |
20140300361 | Transmission Arrangement for a Tomograph - A transmission arrangement for a tomograph, such as magnetic resonance tomography, is provided for wireless energy supply of a local coil system. The transmission arrangement includes at least one first region having at least one first antenna element. The transmission arrangement further includes at least one second region having at least one second antenna element. The at least one first region and the at least one second region are connected to one another via at least one rejector circuit. | 10-09-2014 |
20140300362 | MAGNETIC RESONANCE IMAGING DEVICE - A magnetic resonance imaging device according to an embodiment includes a gradient amplifier, a battery, a detector, and a battery controller. The gradient amplifier supplies electric power to the gradient coil. The battery is charged with electric power that is supplied from the power supply. The detector detects a high power output request on the gradient amplifier. The battery controller controls to supply electric power charged in the battery in addition to electric power supplied from the power supply to the gradient amplifier when the high power output request is detected. | 10-09-2014 |
20140312902 | Local Coil - A local coil for an MRI system includes a signal antenna to receive a magnetic resonance signal and a tuning/detuning circuit to subject the signal antenna part to switch control according to a control signal. The tuning/detuning circuit is connected to the signal antenna part. The tuning/detuning circuit includes a control signal interface, a resonant circuit and an AC/DC conversion circuit. The control signal interface receives the control signal. The resonant circuit includes a diode. The AC/DC conversion circuit converts an alternating current generated by an electromagnetic wave to a direct current. The AC/DC conversion circuit is connected in series with the diode. A small detuning control current may be used, and detuning control circuitry may be reduced. | 10-23-2014 |
20140320130 | Antenna Array for a Magnetic Resonance Tomography System - An antenna array for a magnetic resonance tomography system includes a first ring with a plurality of first capacitors, a second ring with a plurality of second capacitors, and a plurality of antenna rods each extending from a region between two adjacent first capacitors to a region between two adjacent second capacitors. The antenna array enables, as a body coil, a multi-channel reception for use of modern imaging methods with a low level of technical complexity. An antenna rod of the plurality of antenna rods comprises a decoupling module configured to decouple, as required, the respective antenna rod from the remaining antenna rods of the plurality of antenna rods. | 10-30-2014 |
20140320131 | NMR RF PROBE COIL EXHIBITING DOUBLE RESONANCE - NMR probe coils designed to operate at two different frequencies, producing a strong and homogenous magnetic field at both the frequencies. This single coil, placed close to the sample, provides a method to optimize the NMR detection sensitivity of two different channels. In addition, the present invention describes a coil that generates a magnetic field that is parallel to the substrate of the coil as opposed to perpendicular as seen in the prior art. The present invention isolates coils from each other even when placed in close proximity to each other. A method to reduce the presence of electric field within the sample region is also considered. Further, the invention describes a method to adjust the radio-frequency tuning and coupling of the NMR probe coils. | 10-30-2014 |
20140320132 | COIL ARRANGEMENT FOR MPI - The present invention relates to a coil arrangement, in particular for use in a magnetic particle imaging apparatus ( | 10-30-2014 |
20140327442 | Debugging Device for a Body Coil of a Magnetic Resonance Imaging System - A debugging device for a body coil of a magnetic resonance imaging (MRI) system includes a pair of output ports connected to a pair of input ports of the body coil. The debugging device also includes a pair of input ports connected to a pair of output ports of the MRI system. The debugging device includes a pair of extension circuits, separately connected between the pair of input ports and the pair of output ports; and a first adjustment capacitor for reducing or eliminating coupling between the pair of input ports. The first adjustment capacitor is bridged between the pair of input ports, and the capacitance of the first adjustment capacitor is variable. | 11-06-2014 |
20140333305 | MULTIPLE CHANNEL NUCLEAR MAGNETIC RESONANCE COIL - A multi-channel nuclear magnetic resonance (NMR) coil operating at a resonance frequency includes a plurality of unit loops disposed upon a cylindrical surface of a coil body and surrounding the coil body as a closed NMR coil; and a plurality of inter-loop capacitors configured to connect adjacent unit loops respectively, wherein each unit loop comprises a signal channel and further comprises a pair of vertical conducting parts parallel to a cylindrical axis of the coil body, each vertical conducting part comprising an inductor and a first capacitor connected in serial; and a pair of horizontal conducting parts perpendicular to the cylindrical axis of the coil body, at least one horizontal conducting part comprising a second capacitor; and the inter-loop capacitor connects two respective horizontal conducting parts of adjacent unit loops disposed on a same side to eliminate coupling between signal channels of adjacent unit loops. | 11-13-2014 |
20140333306 | USE OF GRADIENT COILS FOR CORRECTING HIGHER ORDER BO FIELD INHOMOGENEITIES IN MR IMAGING - The invention relates to a method of correcting higher order B | 11-13-2014 |
20140347054 | Magnetic Resonance System with Whole-Body Transmitting Array - A magnetic resonance system includes a basic magnet that surrounds a cylindrical examination volume of the magnetic resonance system, the cylindrical examination volume defining a longitudinal axis, and a send structure configured to generate a high frequency excitation field (B | 11-27-2014 |
20140354282 | CERAMIC CAMERA FOR MRI - A camera assembly for use in a MRI machine. The camera assembly includes a Faraday cage defining a shielded cavity and an optical path mount constructed of a highly stiff, dense, and non-electrically-conductive material in the shielded cavity. The camera imager and lens are mounted to the optical path mount. The camera assembly includes a capacitor-based power regulation circuit. The optical path mount is not subject to eddy currents because it is non-electrically-conductive. The capacitor-based power regulation circuit includes very little ferrous material and is within the shielded cavity, to reduce eddy currents. The resulting camera assembly reduces vibrations and shaking in the magnetic field environment of the MRI machine. | 12-04-2014 |
20140354283 | MRI ACOUSTIC SYSTEM, ACOUSTIC OUTPUT DEVICE, AND ELECTRO-ACOUSTIC TRANSDUCER - Provided is magnetic resonance imaging (MRI) acoustic system that includes a magnet that is included in a bore having an image-taking space where an object is able to be accommodated and that forms a magnetic field in the image-taking space to obtain an MR image of the object, an electro-acoustic transducer that is located outside of the bore, and includes coils through which a current for generating an attraction force or a repulsion force with respect to the magnetic field generated by the magnet and a vibrating plate that vibrates in response to the an attraction force or the repulsion force, and a controller that controls the intensity of the current inputted to the electro-acoustic transducer to generate a sound by using the magnetic field that is generated by the magnet. | 12-04-2014 |
20140361776 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus includes a sequence controller. The sequence controller is configured to apply MT (Magnetization Transfer) pulses having a frequency different from a resonance frequency of free water protons and then acquires magnetic resonance signals of an object to be imaged. The sequence controller acquires the magnetic resonance signals for each of multiple frequencies while changing the frequency of MT pulses within a frequency band based on a T2 relaxation time of restricted protons contained in the object to be imaged. | 12-11-2014 |
20140375319 | Transmitting Unit for a Magnetic Resonance Imaging System - A transmitting unit for a magnetic resonance imaging system includes a signal generating unit, an amplifier connected downstream of the signal generating unit, a power splitter connected downstream of the amplifier, and a plurality of electrically decoupled transmitting coils connected downstream of the power splitter. A connectable phase shifter is arranged between the power splitter and at least one transmitting coil of the plurality of electrically decoupled transmitting coils. | 12-25-2014 |
20150008926 | NON-CYLINDRICAL CABLE BALUN DESIGN FOR RF COILS - A non-cylindrical cable balun design having reduced space requirements and that provides for a lighter-weight RF coil is disclosed. The balun includes a balun shell having a non-cylindrical profile, a dielectric foam positioned within the balun shell so as to fill an interior volume defined by the balun shell, and one or more capacitors formed on the balun shell. A non-cylindrical coaxial cable that transmits electromagnetic signals to the balun extends through a length of the balun and is surrounded by the dielectric foam. | 01-08-2015 |
20150015262 | EXTENDED DETUNING IN LOCAL COILS - A local coil for an MRI imaging system includes an antenna containing a first detuning circuit and a second detuning circuit, and a connection connected to the antenna between a first connection point on the antenna and a second connection point on the antenna. The connection is configured to be short-circuited by at least one diode. The first connection point and the second connection point are situated spatially between a first partial region and a second partial region of the antenna. | 01-15-2015 |
20150028873 | MAGNETIC RESONANCE IMAGING DEVICE AND RF COIL - A lower cost MRI device with a portable table detachable from the gantry is provided along with a lower cost table equipped with an easy-to-use and easy-to-install RF coil system able to perform high-resolution head and neck imaging and high-speed whole body imaging in both head-first and feet-first modes. This magnetic resonance imaging device has a portable table detachable from the gantry, and the portable table has a docking connector that can be connected to the gantry and a ceiling panel on which an RF coil can be installed to receive nuclear magnetic resonance signals generated by the examinee and to irradiate the examinee with a high-frequency magnetic field. The RF coil is divided into two or more RF coil units, the ceiling panel has a plurality of ceiling panel connectors enabling each RF coil unit to be connected, and each RF coil unit has a connector. Each RF coil unit is arranged in overlapping fashion on the ceiling plate and the ceiling panel connectors and coil connectors are connected without having to establish an electrical connection between RF coil units. | 01-29-2015 |
20150042340 | APPARATUS AND METHOD FOR AMPLIFYING A RADIO-FREQUENCY SIGNAL - The present invention provides an apparatus and a method for amplifying a radio-frequency signal and an MRI system comprising the apparatus. An aspect of the present invention proposes an apparatus for amplifying a radio-frequency (RF) signal comprising: a magnetically insensitive input balun ( | 02-12-2015 |
20150042341 | MAGNETIC RESONANCE IMAGING APPARATUS AND OUTPUT PATTERN DETERMINING METHOD - In order to obtain high-quality images easily with high flexibility for imaging conditions and apparatus configuration changes in an MRI apparatus using a multi-element coil, an output pattern identifying a synthesizing mode of the respective reception signals received by the respective elements comprising a reception coil is determined according to imaging conditions in the present invention. The determination is performed so that, for example, at least one of a covering rate of an imaging range, an S/N ratio of the final image, and element utilization efficiency becomes the best. The output pattern is comprised of information identifying one or more elements that use reception signals and a synthetic pattern synthesizing the reception signals among the elements to be used. The synthetic pattern, for example, is selected in advance from among a plurality of synthetic pattern candidates to be stored according to a synthesizing method. | 02-12-2015 |
20150042342 | Shielding with Integrated Cooling - An apparatus for cooling an electrical component includes a circuit board with the electrical component disposed on the circuit board. The apparatus includes a cover disposed on the circuit board. The cover and the circuit board form a closed cavity in which the electronic component is disposed. The cavity has a first opening for introduction of a fluid and a second opening for discharge of a fluid. | 02-12-2015 |
20150048831 | Magnetic Resonance Imaging Apparatus and Local Coil Assembly and Local Coil Thereof - A local coil assembly for an MRI apparatus includes an RF channel setting unit, a basic coil having a first slot, and a first additional coil connected to the first slot. Each of the basic coil and the first additional coil includes one or more receiving channels. The RF channel setting unit is configured for setting a receiving channel of the basic coil and a receiving channel of the first additional coil. The basic coil is configured for receiving an RF signal according to a receiving channel set by the RF channel setting unit. The first additional coil is configured for receiving an RF signal according to a receiving channel set by the RF receiving channel setting unit. The present teachings are compatible with multiple coils, and support the combined use of multiple coils. | 02-19-2015 |
20150048832 | MAGNETIC RESONANCE IMAGING APPARATUS AND MANUFACTURING METHOD THEREOF - The MRI apparatus includes a main magnet forming a static magnetic field in a bore, and a gradient coil assembly which forms a magnetic field gradient in the static magnetic field and includes a plurality of shim trays arranged therein at a predefined interval and at least one first shim token provided between the shim trays. | 02-19-2015 |
20150054509 | MRI GRADIENT POWER SYSTEM WITH ADD ON ENERGY BUFFER - The present invention relates to a power supply system ( | 02-26-2015 |
20150054510 | Patient-Adaptive B0 Homogenization of MR Systems Using Different Types of Shim Coils - The embodiments relate to methods and to magnetic resonance tomography systems having a shim system, where the shim system includes at least one global shim coil in an area surrounding the bore of the magnetic resonance tomography system, and where the shim system includes a local shim coil in a local coil of the magnetic resonance tomography system with a shim controller, where the shim controller embodied to define shim currents for the global shim coil and for the local shim coil. | 02-26-2015 |
20150054511 | NUCLEAR QUADRUPOLE RESONANCE SYSTEM - A Nuclear Quadrupole Resonance detection system with features that include:
| 02-26-2015 |
20150061680 | MAGNET ASSEMBLIES - There are disclosed magnet arrays and methods for generating magnetic fields. In embodiments magnet arrays comprise a plurality of polyhedral magnets arranged in a lattice configuration and at least partly enclosing a testing volume, the magnet array having an associated magnetic field with a designated field direction {circumflex over (v)}, wherein the magnetization direction {circumflex over (m)} of an individual polyhedral magnet located at a displacement vector {right arrow over (r)} from an origin point in the testing volume is determined by the formula: {circumflex over (m)}=( | 03-05-2015 |
20150061681 | Local Specific Absorption Rate Reduction - The embodiments relate to a method, a MRI device, and a circuit for an imaging magnetic resonance imaging device that includes at least one transmission coil for transmitting a magnetic field, where the circuit includes a hybrid coupler and at least one phase shifter that may be or are arranged in the transmission path between an amplifier and at least one transmission coil of the magnetic resonance imaging device. | 03-05-2015 |
20150077116 | Superconductor RF Coil Array - A superconducting RF coil array which may be used in whole body MRI scanners and/or in dedicated MRI systems. Some embodiments provide a superconducting RF coil array for at least one of receiving signals from and transmitting signals to a sample during magnetic resonance analysis of the sample, the superconducting RF coil array comprising a thermally conductive member configured to be cryogenically cooled, and a plurality of coils elements comprising superconducting material, wherein each coil element is thermally coupled to the thermally conductive member and is configured for at least one of (i) receiving a magnetic resonance signal from a spatial region that is contiguous with and/or overlaps a spatial region from which at least one other of the plurality of coil elements is configured to receive a signal and (ii) transmitting a radiofrequency signal to a spatial region that is contiguous with and/or overlaps a spatial region to which at least one other of the plurality coil elements is configured to transmit a radiofrequency signal. | 03-19-2015 |
20150077117 | METHOD AND REMOTELY ADJUSTABLE REACTIVE AND RESISTIVE ELECTRICAL ELEMENTS - Apparatus and method that includes providing a variable-parameter electrical component in a high-field environment and based on an electrical signal, automatically moving a movable portion of the electrical component in relation to another portion of the electrical component to vary at least one of its parameters. In some embodiments, the moving uses a mechanical movement device (e.g., a linear positioner, rotary motor, or pump). In some embodiments of the method, the electrical component has a variable inductance, capacitance, and/or resistance. Some embodiments include using a computer that controls the moving of the movable portion of the electrical component in order to vary an electrical parameter of the electrical component. Some embodiments include using a feedback signal to provide feedback control in order to adjust and/or maintain the electrical parameter. Some embodiments include a non-magnetic positioner connected to an electrical component configured to have its RLC parameters varied by the positioner. | 03-19-2015 |
20150077118 | Self-Shielded Split Gradient Coil - Gradient coil assemblies for horizontal magnetic resonance imaging systems (MRIs) and methods of their manufacture. Some embodiments may be used with open MRIs and can be used with an instrument placed in the gap of the MRI. In general, concentrations of conductors or radially oriented conductors may be moved away from the gap of the MRI so as to reduce eddy currents that may be induced in any instrument placed within the gap. Systems for directly cooling primary gradient and shield coils may be utilized and various coil supporting structures may be used to assist in coil alignment or to facilitate use of an instrument in the MRI gap. | 03-19-2015 |
20150084633 | APPARATUS FOR REDUCING NOISE IN A CRYOCOOLER SUCH AS FOR MAGNETIC RESONANCE IMAGING SYSTEMS - An assembly for operating a cryocooler pedestal is provided. The assembly is operable when in use to provide a cryocooler pedestal with cyclical gaseous connection to high pressure and low pressure gas supply lines, and has a return conduit through which gas is caused to flow from the cryocooler pedestal into the low pressure supply line. The assembly further comprises a dispersion chamber adjacent the return conduit and in flow communication therewith through a plurality of orifices so as to reduce acoustic noise. The assembly has particular application in cooling a Magnetic Resonance Imaging system. | 03-26-2015 |
20150084634 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus of an embodiment includes a housing, a static magnet field source having a superconducting coil or a permanent magnet, and a superconducting array antenna which are provided inside of the housing. The superconducting array antenna includes an A/D conversion element configured to convert a received analog signal into a digital signal. | 03-26-2015 |
20150084635 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus of an embodiment includes a housing, a static magnetic field source having a superconducting coil or a permanent magnet inside the housing, and a superconducting array antenna inside the housing. | 03-26-2015 |
20150084636 | Wireless Signal Transmission in Magnetic Resonance Systems - A method is described for the wireless signal transmission of a measurement signal and/or a control signal between two functional components of a MR system. The measurement signal and/or the control signal is encoded into a RF transmit signal with a predefined orbital angular momentum and this RF transmit signal is transmitted between transmit antenna arrangements of the functional components. In addition, the embodiments relate to a local coil and an orbital angular momentum transmit unit with which the method may be carried out, and also a MR system that has a local coil and an orbital angular momentum transmit unit of this type. | 03-26-2015 |
20150091575 | SYSTEM AND METHOD FOR LOCATING A GRADIENT COIL - A magnetic resonance imaging (MRI) system includes an MRI magnet ( | 04-02-2015 |
20150091576 | Magnetic Resonance Imaging System and Coil Control Device Thereof - A coil control device of a magnetic resonance imaging system includes a DC-DC switching converter and a controller. The DC-DC switching converter is configured for switching and converting a DC power supply to a DC current or a DC voltage. An input end of the DC-DC switching converter is connected in parallel to the DC power supply. The controller is configured to control the DC-DC switching converter to switch and provide the DC current or the DC voltage. In some embodiments of the coil control device described herein, two power supplies (e.g., +15 V and −32 V) may be reduced to one power supply (e.g., +15 V), thereby saving energy and foregoing a water-cooling system. | 04-02-2015 |
20150097565 | METHODS AND APPARATUS FOR REDUCING SCAN TIME OF PHASE CONTRAST MRI - A method and apparatus for reducing scan time, eddy currents and image factors in dynamic magnetic resonance (MR) imaging associated with at least a portion a k-space. The method includes scanning at least a portion of the k-space with an Echo-Planar Imaging (EPI) pulse sequence technique, acquiring a randomly under-sampled k-space; and reconstructing the under-sampled k-space utilizing a constrained reconstruction technique. A dynamic image is constructed of the at least a portion of the k-space based on EPI and the randomly undersampled k-space techniques to each segment of the EPI pulse sequence technique. | 04-09-2015 |
20150097566 | METHOD AND DEVICE FOR CONTROLLING A MAGNETIC RESONANCE IMAGING APPARATUS - Starting with a magnetic resonance imaging system control sequence that has a radio-frequency (RF) pulse train to control the RF transmission system and a gradient pulse train, chronologically matching the RF pulse train, to control the gradient system, the gradient pulse train including a predetermined selection gradient pulse chronologically matched to a refocusing pulse of the RF pulse train, the execution capability of the control sequence is initially established using an execution capability criterion, in particular under consideration of a refocusing flip angle of the refocusing pulse. Modification of the refocusing pulse and/or of the selection gradient pulse takes place depending on the establishment of the execution capability of the control sequence. | 04-09-2015 |
20150102813 | Acoustic Noise Reducing RF Coil For Magnetic Resonance Imaging - An RF coil assembly for use in a Magnetic Resonance Imaging scanner incorporates sound absorbing material in its construction for the purpose of attenuating the sound perceived by a patient lying inside the RF coil. Unlike a conventional RF coil assembly in which rigid components are used to support the coil within the magnet bore, the quiet RF coil assembly is constructed without rigid support components. In one embodiment, open cell foam may be used to support the RF coil components and the entire assembly is wrapped in a. flexible cloth-like material. | 04-16-2015 |
20150108982 | ANALOG SIGNAL CORRECTING CIRCUIT IMPROVING SIGNAL DISTORTION DUE TO CABLE - A pulse restoration circuit includes: a voltage restorator configured to include an OP amplifier and input an input voltage to an input terminal of the OP amplifier; a rising time restorator configured to be connected to the other input terminal of the OP amplifier; and a falling time restorator configured to be connected to an output terminal of the OP amplifier, whereby it is possible to improve a reduction in performance of the medical image electronics transmitting an analog signal via the cable and a PET detector of a PET-MRI convergence system among the medical image electronics by correcting a distortion phenomenon of an output signal depending on a cable length into the original signal using the pulse restoration circuit. | 04-23-2015 |
20150108983 | RF TRAP, SUPERCONDUCTING MAGNET APPARATUS INCLUDING THE SAME, AND MAGNETIC RESONANCE IMAGING APPARATUS - A radio frequency (RF) trap for a superconducting magnet apparatus includes an electromagnetic wave shield which includes a conductive shield member and is configured to surround an electric cable; and a circuit member which is provided in a portion of the electromagnetic wave shield, and includes a conductor circuit electrically connected to the conductive shield member in at least two positions. Two positions at which the conductive shield member is electrically connected to the conductor circuit are selectively adjusted so that a current path of the conductor circuit is adjustable according to the two positions at which electrical connections are made. | 04-23-2015 |
20150108984 | METHOD AND APPARATUS FOR DETERMINATION OF A MAGNETIC RESONANCE SYSTEM CONTROL SEQUENCE - In a method and a control sequence determination device for determining a magnetic resonance system control sequence includes at least one radio-frequency pulse train to be emitted by a magnetic resonance system, a target magnetization is acquired and a k-space trajectory is determined. A radio-frequency pulse train for the k-space trajectory is then determined in an RF pulse optimization method using a target function, wherein the target function includes a combination of different trajectory curve functions, of which at least one trajectory curve function is based on a trajectory error model. A method for operating a magnetic resonance system uses such a control sequence and a magnetic resonance system has such a control sequence determination device. | 04-23-2015 |
20150108985 | MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD - Disclosed are a magnetic resonance imaging (MRI) apparatus and method. The MRI apparatus includes a data acquirer, which performs under-sampling of MR signals, respectively received from a plurality of channel coils included in a radio frequency (RF) multi-coil, at non-uniform intervals to acquire a plurality of pieces of line data, and an image processor that restores a plurality of pieces of K-space data respectively corresponding to the plurality of channel coils by using a relationship between the acquired plurality of pieces of line data, thereby restoring an MR image with reduced aliasing artifacts. | 04-23-2015 |
20150115962 | EXPANDED FOAM FORMER APPARATUS AND METHOD FOR MAKING THE SAME - An MR coil former apparatus includes a body, a coil array, and a coil cover. The body defines a patient-facing positive surface opposite a non-patient-facing negative surface. The positive surface of the body includes an anatomic contour, and the coil array is disposed adjacent and conformed to the anatomic contour. The coil cover is disposed overlying the coil array and conformed to the anatomic contour. | 04-30-2015 |
20150115963 | CHANNEL BY CHANNEL ARTIFACT REDUCTION IN PARALLEL MRI - An imaging system ( | 04-30-2015 |
20150123663 | INTEGRATED ELECTRONICS MODULE WITH COOLING STRUCTURE - An integrated electronics module comprising a substrate with electronics components mounted on a mount-surface of the substrate. A heat-conducting layer is disposed on a cooling-surface of the substrate. The cooling-surface and the mount-surface are on opposite sides of the substrate. A fluid-cooling structure of non-magnetic material and a fluid conduit is mounted in thermal contact with the heat-conducting layer. | 05-07-2015 |
20150130464 | POWER CONVERTER FOR POWERING AN MRI GRADIENT COIL AND METHOD OF OPERATING A POWER CONVERTER - A power converter for powering a gradient coil ( | 05-14-2015 |
20150130465 | DIPOLE ARRAY ARRANGEMENT - An apparatus can be provided that can include a plurality of electric dipole antenna arrangements, and a processing arrangement configured to receive a signal(s) from the electric dipole antenna arrangements, and generate a magnetic resonance image based on the signal(s). Each of the electric dipole antenna arrangements can have at least two poles extending in opposite directions from each other. One of the poles can have a curved shape, which can bifurcate and follow two mirror symmetric S-shapes. | 05-14-2015 |
20150130466 | TEM RESONATOR SYSTEM ESPECIALLY FOR USE IN AN MRI SYSTEM - A TEM resonator system is disclosed comprising at least two TEM resonators ( | 05-14-2015 |
20150130467 | Transmission Antenna Apparatus and Magnetic Resonance Imaging Device - The transmission antenna apparatus is configured for emitting transmission magnetic fields in magnetic resonance imaging devices and includes one or more flat antennas. A magnetic resonance imaging device includes such a transmission antenna apparatus. | 05-14-2015 |
20150137813 | Error Analysis and Correction of MRI ADC Measurements for Gradient Nonlinearity - Techniques for correcting gradient non-linearity bias in mean diffusivity measurements by MRI systems are shown and include minimal number of spatial correction terms to achieve sufficient error control using three orthogonal diffusion weighted imaging (DWI) gradients. The correction is based on rotation of system gradient nonlinearity tensor into a DWI gradient frame where spatial bias of b-matrix is described by its Euclidian norm. The techniques obviate time consuming multi-direction acquisition and noise-sensitive mathematical diagonalization of a full diffusion tensor for medium of arbitrary anisotropy. | 05-21-2015 |
20150137814 | GRADIENT MAGNETIC FIELD COIL DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE - A gradient magnetic field coil device is provided in which an eddy current magnetic field of an even-ordered component can be reduced. The gradient magnetic field coil device includes a forward coil and a reverse coil which faces the forward coil so as to sandwich a middle surface and through which flows an electric current directed opposite to the forward coil. The forward coil and the reverse coil have a middle region approaching the middle surface and an outside-the-middle region where the distance from the middle surface is greater than the middle region. A line width of coil lines in the middle region is narrower than a line width of coil lines in the outside-the-middle region. | 05-21-2015 |
20150137815 | CIRCULAR DIPOLE AND SURFACE COIL LOOP STRUCTURES AND METHODS FOR USING THE SAME - A circular dipole antenna (e.g., for a magnetic imaging system) according to exemplary embodiments of the present disclosure can comprise a circular conductor with a feed point on one side and a gap on the other. A surface coil loop antenna (e.g., for magnetic imaging system) is provided with a capacitor arrangement selected for non-uniform or unbalanced current distribution, with corresponding magnetic and electric dipole fields provided in a single structure referred to as a loopole. | 05-21-2015 |
20150137816 | MONOPOLE ARRAY ARRANGEMENT, COMPUTER-ACCESSIBLE MEDIUM AND METHOD FOR USING THE SAME - An array arrangement according to an exemplary embodiment of the present disclosure can be provided. For example, the array arrangement can include a monopole array having a first end and a second end. The monopole array can be configured to be driven from the first end and from the second end. Further, a monopole array can be provided according to another exemplary embodiment of the present disclosure. For example, the monopole array can include a first monopole element can include a first antenna element, and a first grounding element in communication with the first antenna element. The monopole array can also include a second monopole element including a second antenna element, and a second grounding element in communication with the second antenna element. The first antenna element can be oriented in a first direction, and the second antenna element can be oriented in a second direction. | 05-21-2015 |
20150145516 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus includes: a magnetostatic field magnet formed in the shape of a substantially circular cylinder; a gradient coil formed in the shape of a substantially circular cylinder on the inside of the magnetostatic field magnet; a cylindrical part that is formed in the shape of a substantially circular cylinder on the inside of the gradient coil and includes at least one selected from a sound absorbing material layer and a sound blocking material layer; and a ring part that is substantially ring-shaped, covers the space formed between the magnetostatic field magnet and the cylindrical part on at least one end face of a magnet structure being formed in the shape of a substantially circular cylinder and including the magnetostatic field magnet, the gradient coil, and the cylindrical part, and includes at least one selected from an sound absorbing material layer and a sound blocking material layer. | 05-28-2015 |
20150293192 | METHOD AND APPRATUS FOR SUPPRESSING ELECTROMAGNETIC FIELDS INDUCED BY A MAGNETIC RESONANCE IMAGING SYSTEM IN ELECTRONIC CABLES AND DEVICES - A method and apparatus for suppressing electromagnetic fields induced in cables and electronic medical devices by a magnetic resonance imaging (“MRI”) system are provided. The apparatus includes a cable assembly constructed as a conductive wire wrapped around a paramagnetic core. The paramagnetic core may include a tube filled with a paramagnetic material, such as a gadolinium-based solution or a liquid in which iron oxide particles are suspended. | 10-15-2015 |
20150295320 | MODIFIED FOLDED DIPOLE ANTENNA ARRANGEMENT - Exemplary embodiments of the present disclosure include dipole arrangement, or an array of dipole arrangements which can include at least two poles extending in opposite direction from one another, each of the poles including capacitor and an inductor(s). A lattice balun can be located at a center gap between the poles, and can be a 50 ohm lattice balun. The capacitor(s) can be a 10.67 farad capacitor. The inductor can be a 26.7 Henry inductor. The length of each of the poles can depend on a wavelength of a magnetic field generated by the dipole arrangement, or it can depend on a distance from the dipole arrangement to a subject to be imaged. | 10-15-2015 |
20150309130 | Magnetic Resonance (MR) Field Cycling Instrument and Methods Associated Therewith - A system and method for fast magnetic field-cycling of electrically powered solenoids and new method of stabilizing magnetic fields is disclosed. | 10-29-2015 |
20150310650 | Merging magnetic resonance (MR) magnitude and phase images - A magnetic resonance imaging (MRI) system, process, display processing system and/or computer readable medium with stored program code structure thereon is configured to provide for obtaining a composite image which simultaneously includes information from a magnitude MR image and a phase MR image. The composite image is generated by assigning a first color display channel to the magnitude MR image and a second color display channel to the phase MR image, and generating the composite image by assigning to respective pixels in the composite image color values based upon a combination of corresponding pixels in the assigned first and second color display channels. | 10-29-2015 |
20150316627 | IMAGING UNIT - The present invention provides an imaging unit which can image small animals inexpensively and with high resolution. The imaging detector | 11-05-2015 |
20150316629 | MAGNETIC RESONANCE IMAGING APPARATUS AND GRADIENT MAGNETIC FIELD POWER SUPPLY - A magnetic resonance imaging apparatus according to an embodiment includes a gradient magnetic field power supply configured to supply power to a gradient coil. The gradient magnetic field power supply includes a plurality of switching circuits and a processing circuitry. Each of the switching circuits is configured to output a predetermined pulse voltage. The processing circuitry is configured to change the number of switching circuits to be caused to perform switching operation among the switching circuits, in accordance with an intensity of the voltage to be output to the gradient coil. | 11-05-2015 |
20150316633 | MAGNETIC-RESONANCE IMAGING APPARATUS - A magnetic-resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry registers a predetermined protocol set that is selected from among multiple protocol sets preset in a storage unit as a protocol set that is to be executed in an examination of a subject. The processing circuitry accepts an instruction indicating whether to include a check protocol to check an influence of fat suppression in the examination. When the instruction is accepted, the processing circuitry incorporates the check protocol in the protocol set to be executed. | 11-05-2015 |
20150323620 | Coaxial Cable Magnetic Resonance Image (MRI) Coil - Example magnetic resonance imaging (MRI) radio frequency (RF) coils are described. An MRI RF coil may include a first terminal and a second terminal that are connected by a coaxial cable. Rather than rely exclusively on two terminal passive components (e.g., resistor, inductor, capacitor), example coax MRI RF coils rely on the capacitance that can be created in the coax cable between the inner conductor and the outer conductor. The capacitance of the coil may be controlled by selectively disrupting (e.g., cutting, stripping) the outer conductor, the inner conductor, or the dielectric material disposed between the inner and outer conductor. | 11-12-2015 |
20150323625 | RESONANT TRAP WITH AXIAL CHANNEL - A resonant trap comprises a hollow cylindrical body its interior forming an axial channel. An inner conductor is provided on the hollow cylindrical body's inner wall and an outer conductor is provided on the hollow cylindrical body's outer wall. A carrier in the form of a resilient ring or an axial plate is attached to the inner wall of the axial channel and a tuning capacitor mounted to the carrier. | 11-12-2015 |
20150323626 | LOW-LOSS PERSISTENT CURRENT SWITCH WITH HEAT TRANSFER ARRANGEMENT - An apparatus including a persistent current switch of a superconducting material which is electrically superconducting at a superconducting temperature and electrically resistive at a resistive mode temperature which is greater than the superconducting temperature. The apparatus further includes a first heat exchange element; a convective heat dissipation loop thermally coupling the persistent current switch to the first heat exchange element; a second heat exchange element spaced apart from the first heat exchange element; and a thermally conductive link thermally coupling the persistent current switch to the second heat exchange element. The first heat exchange element is disposed above the persistent current switch. The thermally conductive link may have a greater thermal conductivity at the superconducting temperature than at a second temperature which is greater than the superconducting temperature. | 11-12-2015 |
20150331074 | Field-coupled Connection Technique for Linking Coils and/or Patient Tables in Magnetic Resonance Imaging - A magnetic resonance imaging (MRI) system connection for a magnetic resonance imaging system, such as for an MRI local coil and/or patient couch, is provided. The MRI system connection is embodied with devices for a field-coupled transmission of signals. | 11-19-2015 |
20150333700 | AGGREGATED SPIN-TORQUE NANO-OSCILLATORS - A nano-oscillator magnetic wave propagation system has a group of aggregated spin-torque nano-oscillators (ASTNOs), which share a magnetic propagation material. Each of the group of ASTNOs is disposed about an emanating point in the magnetic propagation material. During a non-wave propagation state of the nano-oscillator magnetic wave propagation system, the magnetic propagation material receives a polarizing magnetic field. During a wave propagation state of the nano-oscillator magnetic wave propagation system, each of the group of ASTNOs initiates spin waves through the magnetic propagation material, such that a portion of the spin waves initiated from each of the group of ASTNOs combine to produce an aggregation of spin waves emanating from the emanating point. The aggregation of spin waves may provide a sharper wave front than wave fronts of the individual spin waves initiated from each of the group of ASTNOs. | 11-19-2015 |
20150338481 | GRADIENT COIL UNIT AND MAGNETIC RESONANCE IMAGING APPARATUS - According to one embodiment, a gradient coil unit includes a tubular gradient coil and support structures. The tubular gradient coil is configured to apply a gradient magnetic field to an imaging region of magnetic resonance imaging. The support structures are fixed to plural positions of the gradient coil. The support structures are configured to hold the gradient coil on a tubular magnet by applying pressing forces on positions of an edge inside a wall forming the magnet. The pressing forces each has a component in a central axis direction of the magnet. Further, according to another embodiment, a magnetic resonance imaging apparatus includes the above mentioned gradient coil unit, a static field magnet and at least one radio frequency coil configured to perform magnetic resonance imaging of an object. | 11-26-2015 |
20150346294 | MAGNETIC RESONANCE IMAGING DEVICE - A magnetic resonance imaging device according to embodiments includes a substantially cylindrical-shaped coil structure. The coil structure includes a static field magnet generating a magnetostatic field in a space inside a cylinder, and a gradient coil disposed inside the cylinder of the static field magnet and generating a gradient magnetic field. In the coil structure, magnetic bodies are supported independently of the gradient coil, and are disposed near the center of the coil structure in the long axis direction in such a way as to extend along the circumferential direction of the substantially cylindrical shape. | 12-03-2015 |
20150346297 | Gradient Magnetic Field Coil Device and Magnetic Resonance Imaging Device - A gradient magnetic field coil device has a main coil arrangement formed by embedding into first resin multiple main coils for generating a gradient magnetic field and a leakage magnetic field, and a shield coil arrangement formed by embedding into second resin multiple shield coils for suppressing the leakage magnetic field, wherein the shield coil arrangement includes a facing area that faces the main coil arrangement and is fixed to the main coil arrangement, and a protruding area that protrudes beyond the main coil arrangement, wherein insulated reinforcing members are embedded into the second resin in the protruding area. Multiple reinforcing members are arranged in a circumferential direction of the shield coil arrangement, and the second resin is preferably filled between the adjacent-to-each-other reinforcing members. The reinforcing members are preferably arranged toward the main coil arrangement with respect to the shield coils. | 12-03-2015 |
20150346298 | ACCESSIBLE MAGNETIC RESONANCE IMAGING SCANNER SYSTEM AND METHOD OF OPERATION THEREOF - A magnetic resonance (MR) imaging system ( | 12-03-2015 |
20150355296 | DISPLACEABLE LOCAL COIL - The embodiments relate to a local coil for an imaging magnetic resonance tomography system. The local coil includes at least one displacement facility for a displacement of at least part of the local coil along at least axes running, in particular, in the axial patient direction. | 12-10-2015 |
20150355297 | SYSTEM AND METHOD FOR DECOUPLING MAGENTIC RESONANCE IMAGING RADIO FREQUENCY COILS WITH A MODULAR MAGNETIC WALL - A system and method for decoupling radio frequency (“RF”} coils arranged in proximity to each other is provided. The decoupling is achieved using a magnetic wall that includes resonators arranged on an electrically insulating substrate. The magnetic wall is placed between the RF coils. When an electromagnetic field produced by one of the RF coils is incident on the magnetic wall, the magnetic wall acts to cancel the incident electromagnetic field by attenuating or redirecting the incident field. The magnetic wall is modular, and an array of such magnetic walls can be used to enclose individual RF coil elements, or sub-arrays of two or more RF coil elements. | 12-10-2015 |
20150355303 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus according to an embodiment includes sequence controlling circuitry and image generating circuitry. The sequence controlling circuitry is configured to continuously apply, after application of an excitation pulse, a readout gradient magnetic field while inverting polarity to control execution of a pulse sequence that continuously generates multiple echo signals and configured to collect echo signals for multiple channels by parallel imaging. The image generating circuitry is configured to extract at least one of an even-number-th collected echo signal group and an odd-number-th collected echo signal group from multiple echo signals continuously collected and configured to generate at least one of an even-number-th image and an odd-number-th image using the extracted echo signal group for the multiple channels and sensitivity distribution for the multiple channels. | 12-10-2015 |
20150362568 | TEM RESONATOR-TYPE RF ANTENNA DEVICE FOR A MAGNETIC RESONANCE IMAGING SYSTEM - A TEM RF antenna device ( | 12-17-2015 |
20150362569 | 3T Multinuclear and Proton Composite Array for Magnetic Resonance Imaging - The present invention is a dual resonant breast coil design for combined sodium and proton breast MRI with increased SNR at 3T when compared to a coil with a single proton and sodium channel. The coil consists of a 7-channel sodium receive phased array, a large sodium transmit coil, and a 4-channel hydrogen transceive array. An interleaved overlapping coil layout is used to reduce coupling between sodium and proton coil elements. The new composite array coil demonstrates a 2-5× improvement in SNR for sodium imaging when compared to a simple single-loop dual resonant design. | 12-17-2015 |
20150362572 | MAGNETIC RESONANCE APPARATUS - A magnetic resonance apparatus has a computer designed to emit, on each of at least one control channel, a control signal generated from a sequence of values to control, via each channel, at least one component of the magnetic resonance apparatus. A buffer device is provided for each channel, which includes at least one read control device and a control buffer memory for that control channel. A software tool running on the computer is designed to determine the values as a function of predefined parameters and write them to the control buffer memory. The read control device is designed to read values from the control buffer memory and to supply them, with a read clock derived from a clock that was set independently of the computer, to the respective component. For each of the control buffer memories, the order in which the values are read corresponds to the order in which they are written. | 12-17-2015 |
20150362573 | MAGNETIC RESONANCE APPARATUS AND OPERATING METHOD THEREFOR - In a magnetic resonance apparatus and an operating method therefore, a data acquisition sequence for operating the apparatus is repeatedly reviewed in a number of ascertainment passes executed in a processor, each ascertainment pass involving a calculation step, and in each calculation step a determination is made as to other respective values of data elements used in a previous calculation step have changed. If no change has occurred, a re-calculation in the current calculation step is not implemented, thereby reducing the time and computing capacity that are needed to generate a final data acquisition sequence. | 12-17-2015 |
20150362574 | MULTIBAND RF/MRI PULSE DESIGN FOR MULTICHANNEL TRANSMITTER - A method for designing one or more multichannel, multiband radio frequency (“RF”) pulses for use with a magnetic resonance imaging (“MRI”) system is provided. The method includes determining a number of RF amplitude modulations and a number of RF phase modulations for each channel in a multichannel RF coil by minimizing an objective function that includes a complex-valued vector. The objective function also contains a system matrix that accounts for both a spatial sensitivity profile of each channel in the multichannel RF coil and a magnetic field map for each excitation band in the multiband RF pulse. | 12-17-2015 |
20150369884 | MAGNETIC RESONANCE IMAGING APPARATUS AND GRADIENT COIL - A magnetic resonance imaging apparatus according to an embodiment includes a static magnetic field magnet and a gradient coil. The static magnetic field magnet generates a static magnetic field. The gradient coil is provided on an inside of the static magnetic field magnet and includes an X coil, a Y coil and a Z coil. The X coil generates a gradient magnetic field along a horizontal axis of a substantially circular cylinder, the horizontal axis being perpendicular to a long axis. The Y coil generates a gradient magnetic field along a vertical axis of the substantially circular cylinder. The Z coil generates a gradient magnetic field along the long axis of the substantially circular cylinder. In the gradient coil, coils are laminated in such a manner that the X coil is positioned more distant from a magnetic field center than the Y coil is. | 12-24-2015 |
20150369886 | SYSTEM AND METHOD FOR DECOUPLING MAGNETIC RESONANCE IMAGING RADIO FREQUENCY COILS WITH A MODULAR MAGNETIC WALL - A system and method for decoupling radio frequency (“RF”) coils arranged in proximity to each other is provided. The decoupling is achieved using a magnetic wall that includes resonators arranged on an electrically insulating substrate. The magnetic wall is placed between the RF coils. When an electromagnetic field produced by one of the RF coils is incident on the magnetic wall, the magnetic wall acts to filter the incident electromagnetic field by providing a bandstop condition to the field responsible for coupling energy between coil elements. The magnetic wall is modular, and an array of such magnetic walls can be used to enclose individual RF coil elements, or sub-arrays of two or more RF coil elements. | 12-24-2015 |
20150369890 | COMBINED PET/MR IMAGING SYSTEM AND APD-BASED PET DETECTOR FOR USE IN SIMULTANEOUS PET/MR IMAGING - APD-based PET modules are provided for use in combined PET/MR imaging. Each module includes a number of independent, optically isolated detectors. Each detector includes an array of scintillator (e.g. LSO) crystals read out by an array of APDs. The modules are positioned in the tunnel of a MR scanner. Simultaneous, artifact-free images can be acquired with the APD-based PET and MR system resulting in a high-resolution and cost-effective integrated PET/MR system. | 12-24-2015 |
20150377990 | MAGNETIC RESONANCE COIL APPARATUS - A magnetic resonance coil apparatus is provided, the apparatus having a posterior coil unit including a base unit and a further coil component, wherein the further coil component is arranged so as to be able to be tilted on the base unit with respect to the base unit and wherein the posterior coil unit includes a position acquisition unit. | 12-31-2015 |
20150377991 | SUPERCONDUCTING MAGNET COIL ARRANGEMENT - A superconducting magnet coil arrangement has multiple superconducting coils and at least one of the superconducting coils is provided with a secondary coil of insulated resistive wire mechanically attached to a surface of the superconducting coil. | 12-31-2015 |
20160003924 | SYSTEMS AND METHODS FOR MAGNETIC FIELD DETECTION - This disclosure provides systems, methods, and apparatus for detecting magnetic fields. A magnetic sensor can include a substantially planar magnetostrictive layer. A piezoelectric layer can be bonded to a lower surface of the magnetostrictive layer. An electrode layer can be bonded to a lower surface of the piezoelectric layer. The device can be configured such that, when exposed to a magnetic field, at least one of an admittance amplitude, a quality factor, and a resonant frequency of the device is altered. The device can have a resonant frequency in the range of about 1 MHz to about 100 GHz. | 01-07-2016 |
20160003925 | MRI APPARATUS - According to one embodiment, an MRI apparatus includes an amplifier and processing circuitry. The amplifier amplifies an RF pulse and outputs the amplified RF pulse to an RF coil. The processing circuitry performs correction processing on an envelope of an RF pulse to be inputted to the amplifier so as to compensate nonlinear input-output characteristics of the amplifier. As to this correction processing, the processing circuitry selects a correction information item out of a plurality of correction information items prepared for a corresponding plurality of imaging conditions and performs the correction processing by using the selected information item. | 01-07-2016 |
20160011286 | SHEATH CURRENT FILTER WITH INTEGRATED OPTICAL CABLE GUIDE | 01-14-2016 |
20160018492 | ELECTRONICALLY CONTROLLABLE GROUPS OF ARTIFICIALLY STRUCTURED UNIT CELLS PROVIDING LOCALIZED B1 MAGNETIC FIELDS FOR MRI AND NMR DEVICES - Described embodiments include a system, apparatus, and method. A system includes an array of at least two groups of at least two artificially structured electromagnetic unit cells. Each group includes a controllable amplifier responsive to a B | 01-21-2016 |
20160018501 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus according to an embodiment includes a dividing unit, an acquiring unit, and a combining unit. The dividing unit is configured to divide an imaging region of a patient into at least two temporal or spatial ranges. Of the temporal or spatial ranges, the acquiring unit is configured to perform a data acquiring process on a first range by using a first readout sequence and to perform a data acquiring process on a second range by using a second readout sequence that is different from the first readout sequence in terms of one or both of the type of sequence and an imaging condition. The combining unit is configured to combine an image generated from data acquired by using the first readout sequence with an image generated from data acquired by using the second readout sequence. | 01-21-2016 |
20160025831 | MEDICAL IMAGING - The present disclosure provides systems and methods which may assist in evaluating liver fibrosis/inflammation in the presence of elevated iron using magnetic resonance relaxometry. In a non-limiting embodiment, the systems and methods include: obtaining a measurement of relaxometry data of a subject's liver for extracellular fluid, preferably using a magnetic resonance imaging (MRI) device; determining an iron content for the liver; simulating a measurement of the subject's liver for extracellular fluid for the determined iron content; comparing the measurement of the subject's liver for extracellular fluid to the simulated measurement of the subject's liver for extracellular fluid; and determining from said comparison a value of extracellular fluid in the subject's liver based on a normal iron content for the liver. The simulation can include multi-compartment modeling of various fractions of extracellular fluid in the liver and the impact of iron content in the liver on both the intra- and extracellular relaxation times. | 01-28-2016 |
20160025832 | SYSTEM AND METHOD FOR MAGNETIC RESONANCE IMAGE ACQUISITION - A method of data acquisition at a magnetic resonance imaging (MRI) system is provided. The system receives at least a portion of raw data for an image, and detects anomalies in the portion of raw data received. When anomalies are detected, the system can correct those anomalies dynamically, without waiting for a new scan to be ordered. The system can attempt to scan the offending portion of the raw data, either upon detection of the anomaly or at some point during the scan. The system can also correct anomalies using digital correction methods based on expected values. The anomalies can be detected based on variations from thresholds, masks and expected values all of which can be obtained using one of the ongoing scan, previously performed scans and apriori information relating to the type of scan being performed. | 01-28-2016 |
20160033592 | Enhancement of Magnetic Resonance Image Resolution By Using Bio-Compatible, Passive Resonator Hardware - Embodiments of the present invention address the problems with previously known MRI enhancement resonators. The embodiments provide capacitances that are sufficiently large to result in resonance frequencies that are sufficiently low for medical MRI applications in devices that are sufficiently small for implantation into the body. Further, the capacitance and resonance frequency of the MRI enhancement resonator may be easily adjusted to particular desired values by selecting corresponding thin-film dielectrics, or thicknesses of such thin-film dielectrics. Moreover, the design and geometry of the embodiments provide MRI enhancement resonators with high Q-factors. The construction and material of such MRI enhancement resonators also yield flexible and biocompatible devices that are appropriate for applications involving implantation into the body. | 02-04-2016 |
20160033594 | Magnetic Resonance Imaging (MRI) Coil With Integrated Decoupling - Example magnetic resonance imaging (MRI) radio frequency (RF) coils are described. An MRI RF coil may include an LC circuit and an integrated decoupling circuit. The integrated decoupling circuit may include a wire or other conductor that is connected to the LC circuit and that is positioned within a defined distance of the LC circuit. The integrated decoupling circuit may include a PIN diode and a tunable element. The tunable element may be tunable with respect to resistance, capacitance, or inductance, and thus may control, at least in part, the frequency at which the LC circuit resonates during RF transmission. The example MRI RF coil has more than one point of high impedance, which facilitates reducing heating and operational issues associated with conventional coils. | 02-04-2016 |
20160033595 | DECOUPLING INDUCTOR ASSEMBLY, RADIO FREQUENCY RECEIVING COIL AND MAGNETIC RESONANCE IMAGING APPARATUS - A decoupling inductor assembly, an RF receiving coil, and an MRI apparatus are provided. The decoupling inductor assembly includes a first inductor and a second inductor. The first inductor includes a first solenoid and a first port pair located at two ends of the first solenoid, and the second inductor includes a second solenoid and a second port pair located at two ends of the second solenoid. The first solenoid and the second solenoid are wound partially or completely overlapped. The first port pair includes at least one pair of first parallel connection interfaces, and the second port pair includes at least one pair of second parallel connection interfaces. | 02-04-2016 |
20160033596 | Detector Grid Arrays for MR Imaging - The present disclosure describes examples of magnetic resonance (MR) detector that may replace conventional MR imaging coil arrays. The present disclosure generally describes an example coil design approach that may reduce the number of components for MR imaging devices and may eliminate the need of tissue matching. In some examples, this approach implements a non-resonant grid in which MR-induced currents are allowed to flow unconstrained over the grid (unlike conventional phased array coils in which current is constrained to flow within each loop). Current in each element of the grid may be detected with inductively-coupled pickup loops, which may be attached to independent receiver channels of the MR imaging system. In one example, individual integrated balun pickup coils may be inductively coupled to each grid element. Other connection arrangements, however, may be employed if desired. | 02-04-2016 |
20160033609 | MRI APPARATUS - According to one embodiment, an MRI apparatus includes a generator, an amplifier, and processing circuitry. The generator sequentially generates RF pulses comprising an RF pulse train defined in a pulse sequence. The amplifier amplifies the RF pulses sequentially inputted from the generator. The processing circuitry calculates a correction value, each time an amplified RF pulse is outputted from the amplifier, based on a difference between an output value of the amplified RF pulse and a reference output value. Further, the processing circuitry applies the correction value promptly to an RF pulse to be inputted to the amplifier, the RF pulse to be inputted to the amplifier being included in the RF pulse train and being generated after an RF pulse corresponding to the amplified RF pulse used for calculation of the correction value is generated. | 02-04-2016 |
20160041239 | SYSTEM AND METHOD FOR MAGNETIC RESONANCE COIL ARRANGEMENT - A magnetic resonance imaging (MRI) system is provided. The system includes a main field magnet generating a main magnetic field B | 02-11-2016 |
20160047870 | GRADIENT COIL ASSEMBLY WITH OUTER COILS COMPRISIGN ALUMINUM - The present invention provides a gradient coil assembly ( | 02-18-2016 |
20160054406 | SYSTEM FOR REDUCING THERMAL SHIELD VIBRATIONS - A magnetic resonance imaging system includes at least one gradient coil, at least one coil former, a thermal shield assembly, and at least one linking member. The at least one gradient coil generates at least one gradient field along at least one direction in response to pulsed signals. The at least one coil former is attached with at least one coil. The thermal shield assembly is arranged adjacent to the at least one coil former. The at least one linking member is configured for increasing mechanical rigidity of the thermal shield assembly by mechanically linking at least a part of the thermal shield assembly with the at least one coil former. As a result, mechanical vibrations of the thermal shield assembly can be reduced. | 02-25-2016 |
20160054407 | NESTED COIL CONFIGURATION OF ACTIVE SHIMS IN MRI SYSTEMS - Embodiments of the invention are utilized to improve shimming capability while reducing radial space and the volume required to contain active shim coils by nesting the coils of different degrees and orders inside each other and limiting the azimuthal span of the individual saddle coils. This allows two or more radial shim sets to be combined together in the same layer resulting in a significant radial savings that increases the useable portion of an MRI system. | 02-25-2016 |
20160069968 | LOW FIELD MAGNETIC RESONANCE IMAGING METHODS AND APPARATUS - According to some aspects, a laminate panel is provided. The laminate panel comprises at least one laminate layer including at least one non-conductive layer and at least one conductive layer patterned to form at least a portion of a B | 03-10-2016 |
20160069969 | MAGNETIC RESONANCE IMAGING APPARATUS AND RF COIL - In a magnetic resonance imaging apparatus, a transmission RF coil is configured to emit an RF pulse generated by using a first clock. In addition to an echo signal emitted from a patient, a reception RF coil is configured to further receive the RF pulse emitted by the transmission RF coil and configured to transmit, via a wireless communication, a multiplexed signal in which the echo signal digitalized by using a second clock, the RF pulse, and the second clock are multiplexed together. Wireless receiving circuitry is configured to receive the multiplexed signal via a wireless communication. Correcting circuitry is configured to correct the phase of the echo signal on the basis of the RF pulse and the second clock restored from the multiplexed signal received via the wireless communication. Reconstructing circuitry is configured to reconstruct an image by using the corrected echo signal. | 03-10-2016 |
20160069975 | AUTOMATIC CONFIGURATION OF A LOW FIELD MAGNETIC RESONANCE IMAGING SYSTEM - In some aspects, a method of operating a magnetic resonance imaging system comprising a B | 03-10-2016 |
20160084926 | RECEIVING COIL FOR MAGNETIC RESONANCE IMAGING (MRI) APPARATUS - Provided is a receiving coil for a magnetic resonance imaging (MRI) apparatus, in which the receiving coil includes at least one coil element aligned that is not parallel to a central axis of the receiving coil. The receiving coil is provided in a cylindrical form including ring-type support members and a cylinder-type support member having open ends. | 03-24-2016 |
20160084927 | MAGNETIC RESONANCE IMAGING APPARATUS AND SCANNING-CONDITION SETTING METHOD - According to a Magnetic Resonance Imaging (MRI) apparatus, a scanning-parameter limit calculating unit creates examination information that represents scanning conditions for collection of magnetic resonance signal data based on scanning parameters set by an operator; a scanning-condition edit/scan positioning unit creates a time chart that indicates the type and a sequential execution order of an event to be executed when collecting magnetic resonance signal data based on the examination information created by the scanning-parameter limit calculating unit, and causes a time-chart display unit to display the created time chart. | 03-24-2016 |
20160091576 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus according to an embodiment includes an RF coil and an RF shield. The RF coil is formed in a substantially cylindrical shape. The RF shield is formed in a substantially cylindrical shape and is disposed on an outer circumferential side of the RF coil. The RF shield is provided with a plurality of slits that are in a form of a line extending in an axial direction and having an asymmetrical length in the axial direction with respect to a center in the axial direction and are disposed so as to alternately switch positions thereof in the axial direction along a circumferential direction. | 03-31-2016 |
20160091579 | MAGNETIC RESONANCE IMAGING DEVICE - An open-type magnetic resonance imaging device provides uniformity of a magnetic field without the necessity of lowering the degree of openness, and without increasing the superconducting wire material. The device includes at least one pair of main coils; at least one pair of shield coils; a pair of annular first magnetic substances disposed on an inner radial side of the main coils so that the first magnetic substances are plane symmetrical to each other; and second magnetic substances as protrusion portions disposed on an outer circumferential side of an end surface of the first magnetic substances on an opposite side of the first magnetic substances. | 03-31-2016 |
20160091580 | MAGNETIC RESONANCE APPARATUS WITH A COOLING APPARATUS - A magnetic resonance apparatus has a scanner with a superconducting basic field magnet, a gradient coil unit, and a radio-frequency antenna unit, an electronics unit, and a cooling apparatus. The cooling apparatus has a cryostat for cooling the superconducting basic field magnet and a first cooling circuit for cooling the electronics unit and/or the gradient coil unit and/or the radio-frequency antenna unit, and a second cooling circuit for cooling the cryostat. | 03-31-2016 |
20160091581 | Device for Cancellation of Large Magnetic Susceptibility Artifacts in Magnetic Resonance Imaging of Patients with Pacemakers and Implantable Cardiac Defibrillators - The present invention is directed to a system and method for reducing large magnetic artifact susceptibility in magnetic resonance imaging. The present invention is used to maximize cancellation of the magnetic field distortion cremated when objects with high variations in magnetic susceptibility are placed in a uniform magnetic field. Particularly, the present invention reduces the magnetic resonance imaging artifact produced by pacemakers and internal cardiac defibrillators in order to maximize the diagnostic image quality in the region surrounding these devices. | 03-31-2016 |
20160091586 | MEDICAL IMAGING APPARATUS HAVING MULTIPLE SUBSYSTEMS, AND OPERATING METHOD THEREFOR - In a method for operating a medical imaging apparatus having subsystems, a control protocol assigned to a scan sequence to be performed is provided to a control computer that determines sequence control data for the control protocol, which define different functional subsequences of the scan sequence. Different effective volumes are assigned to each functional subsequence, and current ambient conditions of the apparatus are determined for the sequence control data and associated effective volumes, for a series of states of physiological processes that occur during the scan sequence. Control signals for the scan sequence are determined from the sequence control data, the effective volumes and the current ambient conditions per observed state, that optimize the functional subsequences of the scan sequence locally. During the scan, at least one current state of the observed physiological processes is determined and the control signals used for the ongoing scan are determined from the stored control signals, dependent on the at least one current state. | 03-31-2016 |
20160091587 | MEDICAL IMAGING APPARATUS HAVING MULTIPLE SUBSYSTEMS, AND OPERATING METHOD THEREFOR - In a method for operating a medical imaging examination apparatus having multiple subsystems, current ambient conditions in a scan volume of the apparatus are determined and stored in a global ambient condition parameter set. A control computer starts a scan sequence according to a selected scan protocol, and sequence control data that define different functional sub-sequences for the respective subsystems are provided to the control computer. Different effective volumes are assigned to each functional sub-sequence, and respective current sub-regions in the effective volume associated with the respective sub-sequence are determined, in which a volume optimization is to take place. Control signals for the scan sequence are calculated using the sequence control data, the global ambient condition parameter set, and the determined current sub-regions of the affected volumes, in order to optimize the functional sub-sequences at least with regard to the current sub-region of the assigned effective volume. | 03-31-2016 |
20160091589 | MEDICAL IMAGING APPARATUS HAVING MULTIPLE SUBSYSTEMS, AND OPERATING METHOD THEREFOR - In a method for operating a medical imaging apparatus having multiple subsystems, a control protocol assigned to a scan sequence to be performed is provided to a control computer that determines sequence control data for the control protocol, which define different functional subsequences of the scan sequence. Different effective volumes are assigned to each functional subsequence, and current ambient conditions of the apparatus are determined for the sequence control data and associated effective volumes. Control signals for the scan sequence are determined from the sequence control data, the effective volumes and the current ambient conditions that optimize the functional subsequences of the scan sequence locally, at least with regard to a sub-region of the respective effective volumes. During the scan, at least one change of a sub-region of a respective effective volume is determined and the control signals used for the ongoing scan are modified, dependent on the change, to maintain the aforementioned optimization. | 03-31-2016 |
20160091592 | MODIFIED PULSE SEQUENCE FOR MAGNETIC RESONANCE IMAGING - Systems and methods are provided for obtaining a motion-compensated magnetic resonance imaging (MRI) image of a region of interest. An active marker, responsive to a preparation pulse, is placed within the region of interest. The preparation pulse is directed to the region of interest, and then a plurality of projection gradient pulses are provided to the region of interest. Respective signals produced in response to the plurality of projection gradient pulses are recorded, and a location of the active marker is determined from the recorded signals. | 03-31-2016 |
20160103193 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging (MRI) apparatus includes a coil assembly including a superconductive magnet; and a helium container configured to accommodate a helium in a liquid state and the coil assembly. The helium container includes a partition wall configured to surround a portion of an outer circumference of the coil assembly, and the helium in the liquid state is accommodated in a first space formed between the partition wall and the coil assembly. | 04-14-2016 |
20160109541 | MRI APPARATUS - In one embodiment, an MRI apparatus includes receiving coils each including an A/D converter configured to convert an MR signal received from an object into a digital signal by sampling the MR signal, a clock generation circuit configured to generate a reference clock of the sampling, and a radio transmission circuit configured to wirelessly transmit a digitized MR signal; and a main body configured to wirelessly receive the digitized MR signal and generate an image of the object by reconstructing the digitized MR signal, wherein one of the receiving coils selected as a reference receiving coil by the main body is configured to transmit the reference clock to each of other receiving coils by radio or by wire; and each of the other receiving coils is configured to synchronize the reference clock generated by the clock generation circuit with the reference clock transmitted from the reference receiving coil. | 04-21-2016 |
20160109542 | GRADIENT COIL AND MAGNETIC RESONANCE IMAGING DEVICE - A gradient coil according to an embodiment includes a saddle coil conductor part that is formed of a conductive material to have a substantially cylindrical shape. The conductor part includes a first region on which a spiral shaped first pattern is formed and a second region on which a second pattern different from the spiral shaped first pattern is formed. | 04-21-2016 |
20160109546 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - According to one embodiment, an MRI apparatus includes a gradient coil, an RF coil, an RF receiver, and processing circuitry which controls these components to perform each pulse sequence. The processing circuitry sets a main-scan pulse sequence, a first pulse sequence which includes application of a gradient magnetic field in a readout direction, and a second pulse sequence which includes application of the gradient magnetic field in a readout direction, and whose acquisition region is shifted from the first pulse sequence. The processing circuitry reconstructs image data of the main scan, based on magnetic resonance signals acquired by the main-scan pulse sequence and phase difference data in the readout direction between first k-space data generated from the magnetic resonance signals acquired by the first pulse sequence and second k-space data generated from the magnetic resonance signals acquired by the second pulse sequence. | 04-21-2016 |
20160116540 | APPARATUS FOR IN-SITU NMR SPECTROSCOPY OF METAL-AIR AND METAL-FREE AIR BATTERIES - An apparatus for the in situ NMR monitoring of a battery including an anode, a separator and an air cathode is provided. The apparatus includes a non-metallic anode container portion, a non-metallic cathode container portion, and non-metallic connecting structure and sealing structure for connecting and sealing the anode container portion and the cathode container portion to define a hermetically sealed interior space for containing the battery with an anode of the battery adjacent the anode container portion and an air cathode of the battery adjacent the cathode container portion. The cathode container portion includes an air chamber portion with an air inlet and an air outlet. The air chamber portion can be adjacent to the air cathode such that air flowing from the air inlet to the air outlet will contact the air cathode. A method of evaluating an air cathode battery and a battery assembly for the NMR spectroscopy of an air cathode battery are also disclosed. | 04-28-2016 |
20160124058 | RF ASSEMBLY FOR AN MRD DEVICE COMPRISING A SURFACE AND A VOLUME COIL - A magnetic resonance imaging device (MRD) comprising an RF assembly which has both a volume coil and a surface coil. The coils are simultaneously operable, so that they can be used in a number of ways. These include: both functioning as transceivers; the volume coil functioning as a transceiver and the surface coil as a receiver; the volume coil functioning as a transceiver and the surface coil as a transmitter; both the volume coil and the surface coil functioning as receivers; the volume coil functioning as a receiver and the surface coil as a transceiver; the volume coil functioning as a receiver and the surface coil as a transmitter; both the volume coil and the surface coil functioning as transmitters; the volume coil functioning as a transmitter and the surface coil as a transceiver; and the volume coil functioning as a transmitter and the surface coil as a receiver. | 05-05-2016 |
20160131724 | MRI SCANNER BORE COVERINGS - A bore covering for sealing an MRI scanner bore to create a controlled environment within the MRI scanner bore is disclosed. The bore coverings used with climate control devices may create an incubator-like environment to allow for improved preparation, control, and imaging of infants. A system and kit including one or more bore coverings, and a method of using the bore coverings to create a controlled environment within the MRI scanner bore are also described. | 05-12-2016 |
20160131726 | MAGNETIC FIELD GENERATION DEVICE - A magnetic field generation apparatus includes a main coil and a variable-current correction coil. The main coil is formed by winding a ReBCO-based superconductive wire rod and generates a magnetic field in a measurement space. The variable-current correction coil is variable in a value of a current, coaxial with the main coil and disposed inside the main coil, and generates a magnetic field which corrects a uniformity of the magnetic field generated by the main coil. | 05-12-2016 |
20160131732 | METHOD AND APPARATUS FOR DYNAMIC DISTORTION CORRECTION OF MAGNETIC RESONANCE IMAGE RECORDINGS - In a method and apparatus for the correction of image data dynamically acquired with a magnetic resonance imaging method, a reliable B | 05-12-2016 |
20160139219 | SYSTEM AND METHOD FOR ENHANCING THERMAL REFLECTIVITY OF A CRYOGENIC COMPONENT - A device includes a component operable at a temperature in a range of 3.5 to 6 Kelvin. The device further includes a thermal reflective sheet comprising a plurality of layers, wound around at least a portion of the component. The device also includes a coupling device for coupling the thermal reflective sheet to at least the portion of the component. | 05-19-2016 |
20160139221 | MAGNETIC RESONANCE IMAGING GRADIENT COIL - The invention provides for a magnetic gradient coil ( | 05-19-2016 |
20160154074 | MAGNETIC RESONANCE IMAGING APPARATUS | 06-02-2016 |
20160161580 | MAGNETIC RESONANCE IMAGING DEVICE AND WATER-FAT SEPARATION METHOD - Restriction on echo intervals is to be reduced in the Dixon's method without sacrificing separation performance and image quality. An image is reconstructed from echo signals measured at three or more different echo times. First and second peak frequency distributions in which aliasing (folding) due to echo time intervals is removed are calculated from the obtained images, and the first and second peak frequency distributions are used to obtain an offset frequency distribution. Note that these first peak frequency distribution and second peak frequency distribution are a distribution of peak frequencies obtained on the assumption that all of the pixels are the first substance and a distribution of peak frequencies obtained on the assumption that all of the pixels are the second substance, respectively. The offset frequency distribution and the obtained images are used to separate an image of the first substance from an image of the second substance. | 06-09-2016 |
20160169990 | LAMINATE DESIGN-BASED RADIO FREQUENCY COIL UNIT FOR MRI | 06-16-2016 |
20160169991 | MAGNETIC RESONANCE IMAGING APPARATUS | 06-16-2016 |
20160170001 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD | 06-16-2016 |
20160178713 | STATUS ACQUISITION OF A RF COIL ON OR IN A MAGNETIC RESONANCE DEVICE | 06-23-2016 |
20160178715 | OUTPUT COMBINATION OF TRANSISTORS IN AN MRT RADIO-FREQUENCY POWER AMPLIFIER | 06-23-2016 |
20160178718 | SYSTEM AND METHOD FOR ELECTROMAGNET COIL CONSTRUCTION AND OPERATION | 06-23-2016 |
20160187435 | COOLING SYSTEM AND METHOD FOR A MAGNETIC RESONANCE IMAGING DEVICE - A cooling system includes a first cooling loop having a first cooling fluid configured for circulation therethrough and a second cooling loop having a second cooling fluid configured for circulation therethrough. The first cooling loop is in thermal communication with the superconducting magnet and is configured to provide primary cooling for the magnet, and the second cooling loop is in thermal communication with the superconducting magnet and is configured to provide secondary cooling for the magnet. | 06-30-2016 |
20160187440 | Magnetic Resonance Measurement Apparatus with Improved Instruction Sequence Transfer - Procedure instruction sequences (P | 06-30-2016 |
20160187441 | Apparatus and Method for Processing Reception Signal in Magnetic Resonance Measurement Apparatus - In a magnetic resonance measurement apparatus such as an NMR measurement apparatus, when a frequency of an observation nucleus falls within a high frequency band, an RF reception signal is converted into an intermediate frequency signal, and is input to an analog-to-digital converter. In this case, under-sampling is executed for the intermediate frequency signal in the analog-to-digital converter, and a second-order aliased signal component generated from a target signal component is observed. On the other hand, when the frequency of the observation nucleus falls within a low frequency band, over-sampling for the RF reception signal is executed. | 06-30-2016 |
20160187442 | Magnetic Resonance Measurement Apparatus with Dynamic Variable Attenuator - In a magnetic resonance measurement apparatus, a plurality of transmission signals are combined to generate a digital combined signal. The digital combined signal is converted into an analog combined signal by a D/A converter. The signal includes, for example, a first pulse of a rectangular shape and a second pulse of a mountain shape. During measurement, an operation of a dynamic variable attenuator is changed immediately after the first pulse. With this process, the second pulse is suppressed, and a suppressed second pulse is generated. | 06-30-2016 |
20160187443 | DIFFUSION MODEL DATA ACQUISITION METHOD FOR MAGNETIC RESONANCE IMAGING SYSTEM, AND MAGNETIC RESONANCE IMAGING METHOD - In a method for acquiring MR diffusion data, in a control computer of an MRI system, multiple individual data sets, respectively corresponding to multiple diffusion models, are defined and combined to form a combined data set. Each of said individual data sets is comprised of multiple diffusion image individual data subsets that are to be acquired on one or more specific shells, respectively, and in one or more gradient directions, respectively. Different specific shells among the multiple shells have different diffusion factors. The control computer then operates the MRI system, namely the data acquisition scanner thereof, in order to acquire MR data corresponding to the defined combined data set. | 06-30-2016 |
20160195593 | Microwave coupler for optimizing a NMR probe head for MAS-DNP | 07-07-2016 |
20160195596 | GRADIENT COIL CHECKING DEVICE AND MAGNETIC RESONANCE IMAGING SYSTEM | 07-07-2016 |
20160202332 | THERMAL RADIATION SHIELD FOR SUPERCONDUCTING MAGNET, SUPERCONDUCTING MAGNET AND MAGNETIC RESONANCE IMAGING DEVICE | 07-14-2016 |
20160202333 | GRADIENT COIL AND MAGNETIC RESONANCE IMAGING SYSTEM | 07-14-2016 |
20160252593 | TRANSMITTER DEVICE FOR A MAGNETIC RESONANCE SCANNER | 09-01-2016 |
20160252598 | SYSTEM FOR MAGNETIC FIELD DISTORTION COMPENSATION AND METHOD OF MAKING SAME | 09-01-2016 |
20160377693 | REAL-TIME ADAPTIVE PHYSIOLOGY SYNCHRONIZATION AND GATING FOR STEADY STATE MR SEQUENCES - The present invention is related to a method of acquiring free-breathing steady-state magnetic resonance images (MRI) and a free-breathing Magnetic Resonance (MR) imaging system ( | 12-29-2016 |
20170234947 | RADIO FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING SYSTEM COMPRISING THE SAME | 08-17-2017 |
20170234950 | CIRCUIT ARRANGEMENT, GRADIENT AMPLIFIER, AND METHOD FOR COMPENSATING FOR NONLINEARITIES OF AN AMPLIFIER OUTPUT STAGE | 08-17-2017 |
20180024208 | LOW FIELD MAGNETIC RESONANCE IMAGING METHODS AND APPARATUS | 01-25-2018 |
20180024209 | DISPLACER IN MAGNETIC RESONANCE IMAGING SYSTEM | 01-25-2018 |
20180024210 | SUPERCONDUCTING MAGNET ARRANGEMENT FOR MAGNETIC RESONANCE IMAGING SCANNER | 01-25-2018 |
20180024211 | SYSTEM AND METHOD FOR MAGNETIC RESONANCE COIL ARRANGEMENT | 01-25-2018 |
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