Patent application number | Description | Published |
20080197846 | Magnetic Resonance Imaging With Several Types of Contrast - A magnetic resonance imaging system comprises a signal acquisition system to acquire magnetic resonance signals. A reconstructor reconstructs magnetic resonance images from the acquired magnetic resonance signals. The signal acquisition system and/or the reconstructor are controlled to perform overhead activities separately from actual acquisition of the magnetic resonance signals notably for different contrast types. Accordingly, time efficient signal acquisition for multiple contrasts is achieved. | 08-21-2008 |
20080205730 | Independent Motion Correction In Respective Signal Channels Of A Magnetic Resonance Imaging System - A magnetic resonance imaging (MRI) system, wherein a plurality of independent signal acquisition channels, defined by spatially separated coil elements ( | 08-28-2008 |
20080309333 | Motion-Dependent Data Acquisition in Magnetic Resonance Imaging and Spectroscopy - The invention relates to a magnetic resonance (MR) system for acquiring MR data from a subject ( | 12-18-2008 |
20090003674 | Sense Mr Parallel Imaging With Continuously Moving Bed - During continuous moving of an imaging subject ( | 01-01-2009 |
20090033327 | Magnetic Resonance Imaging of a Continuously Moving Object - A continuous moving table magnetic resonance imaging method is proposed where a ‘lateral’ read out is performed that is transverse to the direction of motion. This magnetic resonance imaging method for imaging a moving object includes spatially selective RF excitations are applied for respective phase-encodings. The sub-volume is excited by the spatially selective RF excitation moves with the motion of the object for respective subsets of primary phase-encodings. Acquisition of magnetic resonance signals is performed from a three-dimensional sub-volume of the object. The magnetic resonance signals are read encoded in a direction transverse to the direction of motion of the object and phase-encoded in at least the direction of motion of the object. | 02-05-2009 |
20090099443 | MAGNETIC RESONANCE DEVICE AND METHOD - The invention relates to a device for MR imaging of a body ( | 04-16-2009 |
20090177076 | MRI OF A CONTINUOUSLY MOVING OBJECT INVOLVING MOTION COMPENSATION - A magnetic resonance examination system has an object carrier ( | 07-09-2009 |
20090278536 | WAVE-PROPAGATION BASED ESTIMATION OF COIL SENSITIVITIES - Low resolution image data from a whole-body coil ( | 11-12-2009 |
20100016708 | MRI RF ENCODING USING MULTIPLE TRANSMIT COILS - A common method of RF encoding assumes that the Bi field generated by the RF coils is linear, which is likely not the case in many situations. It is therefore desirable to have a method of operating an MR system to reconstruct an image of a subject, wherein the method is capable of also handling arbitrary Bi fields used for RF encoding. Accordingly, such an MR system employing one or more RF coils is disclosed herein. The method comprises obtaining transmit sensitivities and weighting factors for individual RF coils. Each RF coil is activated based on its respective weighting factor to apply RF excitation to a subject under examination in the MR system. MR signals—such as free induction decays (FID) signals or echo signals—generated from the subject in response to the RF excitation are received and processed based on the transmit sensitivities to generate an MR image or spectrum representative of the subject. | 01-21-2010 |
20100141259 | METHOD AND RF TRANSMITTER ARRANGEMENT FOR GENERATING RF FIELDS - A multi-channel RF transmitter arrangement comprising a plurality of RF transmitter elements (e) like RF antennas, antenna elements, coils or coil elements, for generating an RF field, especially for use in a magnetic resonance imaging (MRI) system for exciting nuclear magnetic resonances (NMR), and a method for generating such an RF field is disclosed. The RF transmitter elements (e) are segmented in a plurality of segments (s | 06-10-2010 |
20100189328 | METHOD OF AUTOMATICALLY ACQUIRING MAGNETIC RESONANCE IMAGE DATA - The invention relates to a method of automatically acquiring magnetic resonance (MR) image data ( | 07-29-2010 |
20110006766 | COIL SELECTION FOR PARALLEL MAGNETIC RESONANCE IMAGING - The invention relates to a method of selecting a set of coil elements from a multitude of physical coil elements comprised in a coil array for performing a magnetic resonance imaging scan of a region of interest. | 01-13-2011 |
20110026799 | FLIP ANGLE IMAGING WITH IMPROVED B1 MAPPING FOR MULTI-RF TRANSMIT SYSTEMS - A magnetic resonance method includes performing a plurality of magnetic resonance excitation operations each using a different sub-set of a set of radio frequency transmit coils ( | 02-03-2011 |
20110043205 | REAL-TIME LOCAL AND GLOBAL SAR ESTIMATION FOR PATIENT SAFETY AND IMPROVED SCANNING PERFORMANCE - In a method and apparatus to enable increased RF duty cycle in high field MR scans, a specific energy absorption rate (SAR) calculation processor ( | 02-24-2011 |
20110087090 | RADIATION THERAPY SYSTEM WITH REAL TIME MAGNETIC RESONANCE MONITORING - A radiation therapy system comprises: a radiation therapy subsystem ( | 04-14-2011 |
20110112392 | MR IMAGING WITH EXTENDED FIELD OF VIEW - Magnetic resonance examination system comprises displaceable carrier for supporting an object to be examined. The carrier can be moved over a two dimensional area. The magnetic resonance examination system is configured to acquire sets of magnetic resonance signals from the object for various positions of the carrier in the two dimensional area. | 05-12-2011 |
20110156704 | B1-MAPPING AND B1L-SHIMMING FOR MRI - The invention relates to a method of acquiring MRI image data comprising the following steps: performing a 3-dimensional B1 mapping of a first volume using a first voxel size, selecting an MRI protocol, performing the B1-shim in accordance with the MRI protocol, performing the MRI protocol to acquire MRI imaging data of a second volume using a second voxel size, wherein the first voxel size is larger than the second voxel size, wherein the first volume is larger than the second volume, and wherein the second volume is contained within the first volume. | 06-30-2011 |
20120007600 | ACCELERATED B1 MAPPING - A method comprises: performing a number of B i field mapping sequences ( | 01-12-2012 |
20120013337 | SAR HOTSPOT REDUCTION BY TEMPORAL AVERAGING IN PARALLEL TRANSMISSION MRI - A magnetic resonance sequence includes a repetitively applied radiofrequency B | 01-19-2012 |
20120019247 | SAR REDUCTION IN PARALLEL TRANSMISSION BY K-SPACE DEPENDENT RF PULSE SELECTION - When generating an MR image using a multi-channel transmit coil arrangement, SAR is reduced by employing a number of different RF pulses in a single scan. Each RF pulse exhibits a different performance and/or accuracy, resulting in different RF pulse-specific SAR values. As a result, the RF pulses differ slightly in actual excitation pattern, B1 waveform and/or k-space trajectory, etc. The average SAR over a single scan is thus reduced compared to a fixed RF pulse, without compromising image quality. | 01-26-2012 |
20120089010 | HYPERPOLARIZED CONTRAST AGENT DISPENSER FOR MAGNETIC RESONANCE IMAING - A dispenser ( | 04-12-2012 |
20120169333 | MOTION MONITORING SYSTEM FOR MONITORING MOTION WITHIN A REGION OF INTEREST - The invention relates to a motion monitoring system ( | 07-05-2012 |
20120184841 | RETROSPECTIVE CALCULATION OF RADIATION DOSE AND IMPROVED THERAPY PLANNING - A combined magnetic resonance (MR) and radiation therapy system ( | 07-19-2012 |
20120256630 | DYNAMIC NUCLEAR POLARIZATION APPARATUS WITH SAMPLE TRANSPORT SYSTEM - The invention relates to a dynamic nuclear polarization apparatus ( | 10-11-2012 |
20120308111 | RF ANTENNA ARRANGEMENT AND METHOD FOR MULTI NUCLEI MR IMAGE RECONSTRUCTION INVOLVING PARALLEL MRI - A multi nuclei RF antenna arrangement for use in a multi nuclei MRI system or an MR scanner, for transmitting RF excitation signals (B | 12-06-2012 |
20130089271 | DYNAMIC CONTRAST ENHANCED MR IMAGING WITH COMPRESSED SENSING RECONSTRUCTION - The present invention relates to a method of performing dynamic contrast enhanced magnetic resonance imaging of an object ( | 04-11-2013 |
20130099786 | PARALLEL MAGNETIC RESONANCE IMAGING USING UNDERSAMPLED COIL DATA FOR COIL SENSITIVITY ESTIMATION - A computer program product ( | 04-25-2013 |
20130134975 | VIRTUAL COIL EMULATION IN PARALLEL TRANSMISSION MRI - The invention relates to a virtual coil emulation method to be used in a magnetic resonance imaging scan for acquiring a magnetic resonance image of an object ( | 05-30-2013 |
20130249553 | MR IMAGING USING A MULTI-POINT DIXON TECHNIQUE - The invention relates to a method of MR imaging of at least a portion of a body ( | 09-26-2013 |
20140035582 | MAGNETIC RESONANCE IMAGING OF OBJECT IN MOTION - A magnetic resonance imaging method includes acquisition of datasets of magnetic resonance data from an object. At least some of the datasets are undersampled in k-space. Each dataset relating to a motion state of the object. Images are reconstructed from each of the datasets by way of a compressed sensing reconstruction. Motion correction is applied to the reconstructed images relative to a selected motion state, so as to generate motion corrected images. A diagnostic image for the selected motion state is derived, e.g. by averaging from the motion corrected images. | 02-06-2014 |
20140043021 | SIMULTANEOUS NON-CONTRAST MR ANGIOGRAPHY AND INTRAPLAQUE HEMORRHAGE (SNAP) MR IMAGING - Magnetic resonance (MR) spins are inverted by applying an inversion recovery (IR) radio frequency pulse ( | 02-13-2014 |
20140055135 | MOTION TRACKING BASED ON FAST IMAGE ACQUISITION - A magnetic resonance imaging (MRI) system including a memory for storing machine executable instructions and a processor for controlling the magnetic resonance imaging system. The MRI system for performing a plurality of MRI scans for acquiring magnetic resonance data from a target volume of a patient in accordance with respective predefined scan geometries. The execution of the machine executable instructions causes the processor to control the MRI system to at least: perform a first calibration scan; perform a second calibration scan; generate geometry transformation data; determine a deviation of the target volume caused by a movement of the patient; update each of the predefined scan geometries and the second scan geometry as a function of the geometry transformation data; and perform at least one MRI scan of the plurality of MRI scans to acquire image data in accordance with the respective updated predefined scan geometry. | 02-27-2014 |
20140070805 | MR IMAGING WITH B1 MAPPING - The invention relates to a method of MR imaging, wherein a portion of a body is subjected to an imaging sequence of RF pulses and switched magnetic field gradients, which imaging sequence is a stimulated echo sequence including an off-resonant Bloch-Siegert RF pulse (BS) radiated during a preparation period ( | 03-13-2014 |
20140121492 | MRI WITH SEPARATION OF DIFFERENT CHEMICAL SPECIES USING A SPECTRAL MODEL - The invention relates to a method of MR imaging of at least two chemical species having different MR spectra. The method comprises the steps of: generating MR signals of the chemical species by subjecting a portion of a body ( | 05-01-2014 |
20140296696 | METHOD AND SYSTEM USING MAGNETIC RESONANCE IMAGING FOR TISSUE CLASSIFICATION AND BULK-DENSITY ASSIGNMENT - An apparatus includes a magnetic resonance imaging system, a processor for controlling the apparatus, and a memory containing machine executable instructions and a pulse sequence. The machine executable instructions and pulse sequence cause the processor to control the apparatus to: acquire magnetic resonance data from an imaging volume, wherein the magnetic resonance data includes gradient echo data; segment the magnetic resonance data into a plurality of segments, the segments including a fat segment, a water segment, a cortical bone segment, and an air segment; and create a bulk density map of the imaging volume from the segments. | 10-02-2014 |
20150042335 | MR IMAGING WITH B1 MAPPING - The invention relates to a method of MR imaging, wherein a portion of a body ( | 02-12-2015 |