| Patent application number | Description | Published |
|---|
| 20080231272 | Magnetic Resonance Imager - Provided is a magnetic resonance imager capable of efficiently suppressing artifacts in radial scanning that is short of the number of echoes. | 09-25-2008 |
| 20080315880 | Coil apparatus and magnetic resonance imaging apparatus using the same - There is provided an RF coil capable of resonating or tuning two frequencies, having uniform spatial sensitivity and having a small spatially occupied volume, especially an RF coil suitable for a high magnetic field MRI apparatus. A coil apparatus is made up of a plurality of linear conductors | 12-25-2008 |
| 20090030302 | MAGNETIC RESONANCE IMAGING DEVICE - The magnetic resonance imaging apparatus includes a control unit for controlling a pulse sequence that applies an RF magnetic field and a magnetic field gradient to a subject placed in a static magnetic field and detects a magnetic resonance signal generated from the subject, and a calculation unit for processing the signal, and the control unit performs the process including the steps of; (1) obtaining first images at different positions in a first direction, (2) obtaining images after the first images are subjected to correction of brightness distortion, (3) obtaining images after the images as to which the brightness distortion has been corrected are further subjected to correction of positional distortion, and (4) synthesizing by a weighting calculation, overlapping areas of the images, after the positional distortion thereof has been corrected. According to this magnetic resonance imaging apparatus, the positional distortion and the brightness distortion can be corrected upon connecting the images, in the multi-station imaging. | 01-29-2009 |
| 20090160441 | Magnetic Resonance Imaging Apparatus - A vertical magnetic field type MRI apparatus is capable of high-speed-imaging a large cross section such as a whole human body while suppressing an increase in the number of channels and maintaining sensitivity to a deep portion of a subject to be high. A receiving coil is composed of a plurality of sub coils. A first sub coil ( | 06-25-2009 |
| 20090201020 | MAGNETIC RESONANCE APPARATUS UTILIZING TIME-VARYING RATE OF MAGNETIC RESONANT FREQUENCY - The present invention provides a magnetic resonance imaging system capable of performing spectrum measurement even when a magnetic resonant frequency changes during MRS measurement. A time-varying rate of a water magnetic resonant frequency is measured in advance before the MRS measurement. The amount of change in water magnetic resonant frequency during the MRS measurement is predicted from the measured time-varying rate. With the predicted value as the reference, a transmission frequency of an RF magnetic field irradiated in a signal suppression pulse sequence, a transmission frequency of an RF magnetic field for excitation and inversion and a received frequency at the detection of a magnetic resonance signal in a sequence of the MRS measurement are respectively set. A high-precision spectrum measurement is hence enabled. | 08-13-2009 |
| 20090219020 | MAGNETIC RESONANCE IMAGING APPARATUS - When a magnetic resonance signal is received more than once, while a table (transfer unit) is moved, a gradient magnetic field is applied in the table moving direction, and an application amount (intensity and application time) of the gradient magnetic field in the table moving direction is changed every acquisition of data. As for the encoding by the gradient magnetic field in the table moving direction, a series of phase encode is performed at different positions of an examination target, unlike a conventional phase encode. Therefore, the Fourier transform cannot be applied to the image reconstruction. Given this situation, a magnetization map of total FOV of the examination target is determined in such a manner that a sum of the square of an absolute value of a difference is minimized, the difference between a received signal and a signal calculated from the magnetization map set as a variable, and then, the reconstruction is performed. Even when a size of signal acquisition area in the table moving direction is narrow, the magnetic resonance imaging apparatus of the present invention is capable of taking an image of a wide field of view at high speed, by performing the imaging while the table is moved continuously. | 09-03-2009 |
| 20090251142 | Magnetic Resonance Imaging Apparatus - The MRI apparatus of the present invention executes a non-imaging mode | 10-08-2009 |
| 20100033177 | Inspection Apparatus using Magnetic Resonance and Nuclear Magnetic Resonance Signal Receiver Coil - An MRI apparatus capable of selecting an optional direction as a phase encoding direction and achieving a preferable S/N, when an imaging time shortening technique is applied. A receiver coil, used as a receiver coil of a vertical magnetic field MRI apparatus, is a combination of a first coil (solenoid coil) forming a current loop around the outer circumference of a test object, second coils forming even-numbered current loops, and third coils forming odd-numbered current loops, in the direction intersecting the plane of the current loop of the first coil. The second coil and the third coil are arranged in such a manner that, as for the current loops in the array direction thereof, a position where a sensitivity of one coil is minimized approximately coincides with a position where the sensitivity of the other coil is maximized, whereby electromagnetic coupling is suppressed. | 02-11-2010 |
| 20100033183 | MAGNETIC RESONANCE IMAGING APPARATUS AND RF COIL FOR MAGNETIC RESONANCE IMAGING APPARATUS - This invention provides a receiving coil that allows a high-quality image of high depth sensitivity to be obtained during vertical magnetic field MRI without limiting selection of a cross section to be imaged and of a phase-encoding axis. A subject's field of view is broadened without deterioration of the coil characteristics. Two orthogonal solenoid coils ( | 02-11-2010 |
| 20100253347 | ANTENNA SYSTEM AND MAGNETIC RESONANCE IMAGING APPARATUS - An RF coil is provided with a hollow-shaped outer conductive element and strip-shaped conductive elements disposed along the outer conductive element in the axial direction. The strip-shaped conductive elements are disposed with uneven intervals to secure an internal space at a position where the strip-shaped conductive elements are not disposed. In order to obtain uniform sensitivity at the center section of the RF coil, the strip-shaped conductive elements and the outer conductive element are electrically connected via capacitors of which capacitances are adjusted so that a magnetic field component perpendicular to the center axis should be generated at a desired resonance frequency, and the strip-shaped conductive elements are axisymmetrically disposed with respect to the center axis of the outer conductive element. As a result, a comfortable examination space in a tunnel type MRI apparatus is achieved without increasing the manufacturing cost of the MRI apparatus. | 10-07-2010 |
| 20110031970 | Magnetic Resonance Imaging Apparatus - The present invention provides a vertical magnetic field MRI apparatus which is capable of speeding up imaging for taking an image of any cross section of a wide area such as a total body, while suppressing increase of the number of channels and maintaining high sensitivity in a deep portion of a subject. A receiver coil unit | 02-10-2011 |
