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| Number | Title | Issue Date |
| 8217653 | Multi-channel RF coil system with multi-channel RF coil transceiver detecting more than one frequency at the same time for magnetic resonance imaging systems and methods An RF coil system for magnetic resonance applications includes a multi-channel RF coil transceiver and a multi-channel RF coil. The RF coil system is structured for reconfiguration between a plurality of operational modes. ... | 07/10/2012 |
| 7418287 | Magnetic resonance imaging method with accelerated data acquisition A method of dynamic magnetic resonance imaging comprising acquiring undersampled magnetic resonance signals for successive temporal time slots. In a space spanned by geometrical space and temporal frequency and on the basic of a priori information the aliased differ... | 08/26/2008 |
| 7372265 | Compensation of magnetic field disturbances due to vibrations in an MRI system A magnetic resonance imaging (MRI) system includes an examination volume (9), a main magnet system (17) for generating a main magnetic field (B0) in the examination volume, a gradient magnet system (25) for generating gradients of the... | 05/13/2008 |
| 7362099 | Randomized ordered k-space sub-sets for shared pre-pulses in MRI A magnetic resonance imaging scanner (10) includes a main magnet (12), magnetic field gradient coils (16), and one or more radio frequency coils (18). A sequence generator (60, 62, 64, 66) generates an anti-ghosting imaging sequenc... | 04/22/2008 |
| 7358727 | Truncated MR imaging with fractional readout FOV useful for breast and spine imaging A method and system for MR imaging are disclosed that include a fractional readout FOV to provide flexibility in scan volume prescription as well as reduce scan artifacts typically associated with uninteresting anatomy. The fractional readout FOV is defined by a fre... | 04/15/2008 |
| 7323876 | Magnetic resonance imaging receive chain with dynamic gain and wireless receiver coil Methods and apparatuses are disclosed for dynamic adjustment of the receiver gain during magnetic resonance imaging (MRI) scan. To account for distortions introduced by the receiver that may be different at various receiver gains, a reference radio frequency (rf) si... | 01/29/2008 |
| 7319328 | System, method, and computer-readable medium for magnetic resonance diffusion anisotropy image processing A system, method, and computer-readable medium for magnetic resonance diffusion anisotropy image processing are provided. ... | 01/15/2008 |
| 7282917 | Method and apparatus of multi-coil MR imaging with hybrid space calibration The present invention provides a system and method for parallel imaging that performs auto-calibrating reconstructions with a 2D (for 2D imaging) or 3D kernel (for 3D imaging) that exploits the computational efficiencies available when operating in certain data “d... | 10/16/2007 |
| 7275413 | Methods, systems, circuits, and computer program products for determining polarization of a gas A system for determining polarization of a gas comprises a container that contains the polarized gas. An oscillator circuit comprises an Nuclear Magnetic Resonance (NMR) coil that is positioned adjacent to the container. A pulse generator circuit is configured to ge... | 10/02/2007 |
| 7227356 | Method and apparatus of multi-echo MR data acquisition with non-discrete flip angle train An imaging technique is disclosed to reduce ringing artifacts from amplitude decay in MR multi-echo acquisition. A flip angle train is determined to match scan parameters for an MR scan to acquire MR data from a given tissue. Reducing the effects of amplitude decay ... | 06/05/2007 |
| 7224164 | Method of monitoring a magnetic field drift of a magnetic resonance imaging apparatus The invention enables to monitor a magnetic field drift of a magnetic resonance imaging apparatus on the basis of the magnetic resonance signals, which are acquired during magnetic resonance image data acquisition, such as by single shot EPI or by a gradient echo se... | 05/29/2007 |
| 7218111 | Instrument to measure the polarization of a hyperpolarized substance This invention concerns a new embodiment of the instrument to measure nuclear polarization described in U.S. Pat. No. 6,356,080. The coil, that couples the nuclear polarized substance to the electronics, has been designed not to pick up ambient electromagneti... | 05/15/2007 |
| 7218110 | Method and apparatus for diffusion magnetic resonance imaging with the effects of eddy currents compensated A method and a system for acquiring diffusion magnetic resonance images with compensation of the effects of eddy currents induced by the diffusion weighting (DW) gradient pulses. Prescan data are first acquired using the same DW sequence to be used for imaging. The ... | 05/15/2007 |
| 7208950 | Magnetic resonance apparatus and operating method therefor employing a steady-state pulse sequence In a method for operating a magnetic resonance apparatus with a steady-state pulse sequence and a magnetic resonance apparatus for implementing the method, to reduce magnetization in an examination subject outside of a slice of interest, an RF pulse acting selective... | 04/24/2007 |
| 7183770 | High-frequency system for an MR apparatus with multiple transmit channels The invention relates to a high-frequency system for an MR apparatus with a high-frequency coil arrangement comprising a plurality of resonator elements (104), which is connected to a transmit unit (106), where a respective transmit channel (1–8) of ... | 02/27/2007 |
| 7176687 | T1-weighted multiecho magnetic resonance imaging In a method for magnetic resonance imaging of at least a portion of a body placed in a stationary and substantially homogeneous main magnetic field, the body is subjected to a sequence of RF and magnetic field gradient pulses during an interval TSE, thereby generati... | 02/13/2007 |
| 7173421 | Nuclear spin resonance clock arrangements Nuclear spin resonance (NSR) clock arrangements. ... | 02/06/2007 |
| 7132942 | Method and apparatus for detecting a target material in a sample by pre-screening the sample for piezoelectric resonance A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate th... | 11/07/2006 |
| 7109710 | Method and apparatus to improve signal-to-noise ratio without compromising field-of-view for simultaneous MR data acquisition by an array of RF coils of an MR scanner A method and apparatus is disclosed to analogically combine MR signals from RF coils to form multiple sets of analogically combined MR signals, and then digitally combine the analogically combined sets of MR signals to provide a digitized signal set for image recons... | 09/19/2006 |
| 7091721 | Phased array local coil for MRI imaging having non-overlapping regions of sensitivity A capacitor decoupling network allows the production of a multi-loop local coil for magnetic resonance imaging without overlap of the loops and/or with decoupling between both adjacent and non-adjacent coils. The former design may find application for new MRI techni... | 08/15/2006 |
| 7088098 | System, method and apparatus for tuning an RF volume coil A method for tuning a radio frequency coil of a magnetic resonance imaging system includes disposing a plurality of probes at selected portions of a fixture, disposing the fixture proximate to the radio frequency coil at a first location, and obtaining a first set o... | 08/08/2006 |
| 7084630 | Multi-modal RF coil for magnetic resonance imaging Multi-modal coils for coupling MRI RF signals from an anatomical region(s) to be imaged. The coil includes a segmented annular base ring conductor including a plurality of capacitances disposed between the segments, and at least one arcuate conductor symmetrically c... | 08/01/2006 |
| 7078904 | Distortion-corrected magnetic resonance measurement and magnetic resonance device A distortion-corrected magnetic resonance examination with a magnetic resonance device is undertaken by use of a distortion correction algorithm which uses coefficients to describe a magnetic field used in a measurement. In this case, after an examination area has b... | 07/18/2006 |
| 7068032 | Gain adjustment method and magnetic resonance imaging apparatus A method for adjusting a gain for reception of a magnetic resonance signal in a magnetic resonance imaging apparatus includes defining an initially set value of a slice thickness as slthick-original, defining a gain fit therefor as prescan-R1, and calculating... | 06/27/2006 |
| 7064544 | Method and system of scaling MR spectroscopic data acquired with phased-array coils The present invention is directed to a system and method of resealing spectroscopic data acquired with phased-array or surface coils to absolute “local” units and, hence, preserves the industry-desirable quantitative approach to single voxel MRS. An MRS signal i... | 06/20/2006 |
| 7061239 | Method for magnetic field tracking in a NMR check weighing system A method (10) insures that the characteristics of the magnetic field used in a magnetic resonance check weighing system (20) for samples in vials (22) on a production line track deviations from the resonant frequency of the sample. The method ( | 06/13/2006 |
| 7057390 | Linear beam raster magnet driver based on H-bridge technique An improved raster magnet driver for a linear particle beam is based on an H-bridge technique. Four branches of power HEXFETs form a two-by-two switch. Switching the HEXFETs in a predetermined order and at the right frequency produces a triangular current waveform. ... | 06/06/2006 |
| 7010066 | System and method for fast code phase and carrier frequency acquisition in GPS receiver A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code... | 03/07/2006 |
| 7002343 | Method for determining a compensation setting for an eddy current field In a method for determining a compensation setting for an eddy current field that is caused by a temporally variable gradient field of a magnetic resonance apparatus, at least two magnetic resonance data sets arising from different spatial positions are generated us... | 02/21/2006 |
| 6995559 | Method and system for optimized pre-saturation in MR with corrected transmitter frequency of pre-pulses A method, system and computer program product is provided for optimizing pre-saturation in Magnetic Resonance Imaging. The optimization is done by setting a correct transmitter frequency of RF pre-pulses for all scan slices. A B.sub.0 magnetic field map for each sca... | 02/07/2006 |
| 6977501 | MRI apparatus and method for calculating predicted and/or actual net accumulated gradient coil heat and/or temperature A magnetic resonance imaging apparatus includes a calculator that calculates the quantity of heat generated (or to be generated) in a gradient magnetic field coil as a function of current supplied (or to be supplied) to the gradient magnetic field coil and at least ... | 12/20/2005 |
| 6956476 | Method and apparatus for detecting a target material in a sample by pre-screening the sample for piezoelectric resonance A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate th... | 10/18/2005 |
| 6937016 | Reception device for a magnetic resonance tomography installation, having a phase shift-compensating amplifier A reception device for detecting an electromagnetic radio-frequency wave emitted by the examination subject in a magnetic resonance tomography installation has two reception coils and amplifiers arranged following these coils. The mutually phase-delayed reception si... | 08/30/2005 |
| 6812699 | Systems and methods for tuning an RF pulse by changing a pulse width of the RF pulse For the purpose of RF pulse tuning so as to effectively utilize the capacity of an RF transmission apparatus, in tuning the RF pulse for excitation use so as to make the flip angle of spins identical with its target value, the pulse width of the RF pulse is consecut... | 11/02/2004 |
| 6775568 | Exchange-based NMR imaging and spectroscopy of hyperpolarized xenon-129 A method and an apparatus for using hyperpolarized xenon-129 and magnetic resonance imaging or spectroscopy as a probe to non-invasively and non-destructively characterize important properties of certain structures or materials with high spatial and temporal resolut... | 08/10/2004 |
| 6731113 | Method of and device for the compensation of variations of the main magnetic field during magnetic resonance imaging At least one quantity which is characteristic of the temperature-dependent magnetic properties of magnetizable material which interacts with the magnetic fields of a magnetic resonance imaging device is determined in order to compensate the temporally varying streng... | 05/04/2004 |
| 6707301 | External magnetic field measuring method, static magnetic field correcting method, external magnetic field measuring apparatus, and MRI system In order to nullify the adverse effect of an external magnetic field on a static magnetic field generated in an MRI system, small-size coils are used to generate a compensation magnetic field. Thus, the component of the static magnetic field to be applied to a magne... | 03/16/2004 |
| 6694166 | Magnetic resonance method A magnetic resonance method is described for forming a fast dynamic image with an automatically generated grid of essentially orthogonally arranged grid lines by a saturation information induced over the object to be imaged. Therefore a first set of paral... | 02/17/2004 |
| 6591149 | Method for prescribing a ramp by a clock-pulse-controlled quantity In a method for prescribing an essentially linear ramp with a prescribable slope by a quantity, and which is clock-pulse-controlled and which describes the ramp by an increment per clock interval, the ramp is described by a number of regular increments an... | 07/08/2003 |
| 6587706 | Microcoil device with a forward field-of-view for large gain magnetic resonance imaging Microcoils can be used in medical devices to enhance RF response signals and to create fields to enhance imaging capability in MRI imaging systems. An improved microcoil design includes a device to be inserted into a patient comprising a solid body having... | 07/01/2003 |
