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| Number | Title | Issue Date |
| 8035388 | Method and apparatus for providing a sensitive volume for single-sided NMR An apparatus for providing a sensitive volume for single-sided NMR includes: (i) at least one first permanent magnet for providing a first magnetic field at the sensitive volume; and (ii) at least one of the following means for superimposing at least one second magn... | 10/11/2011 |
| 8035387 | Methods and apparatus for compensating field inhomogeneities in magnetic resonance studies One aspect of the present disclosure relates to a method or determining location(s) at which at least one magnetic article is to be positioned during a magnetic resonance imaging procedure of at least one subject. A magnetic field Bo is applied to a region that incl... | 10/11/2011 |
| 7898258 | Compact superconducting magnet configuration with active shielding having a shielding coil contributing to field formation A superconducting magnet configuration (4; 14) for generating a homogeneous magnetic field B0 in an examination volume (4b), has an interior radial superconducting main field coil (1) which is disposed rotationally symmetricall... | 03/01/2011 |
| 7755359 | Magnetic resonance imaging apparatus with noise suppressing structure A magnetic resonance imaging apparatus capable of suppressing noise caused by vibration of a gradient magnetic field coil and improving image quality includes a large number of ferromagnetic shims disposed in a large number of holes formed in a shim tray, and vibrat... | 07/13/2010 |
| 7741847 | Magnetic resonance apparatus with temperature controlled magnet shim pieces A magnetic resonance apparatus in which magnetic metal pieces are accommodated in an accommodation section so as to correct uniformity in a main magnetic field, includes an acquisition unit which acquires temperature information related to at least one of a temperat... | 06/22/2010 |
| 7719279 | Self-fastening cage surrounding a magnetic resonance device and methods thereof The present invention discloses a self-fastening cage of a magnetic resonance device (MRD) for providing a homogeneous, stable and uniform magnetic field therein, characterized by an outside shell comprising at least three flexi-jointed superimposed walls. The multi... | 05/18/2010 |
| 7714580 | Shim for imaging magnets An arrangement for producing an imaging region of increased maximum radial diameter in a magnetic resonance imaging (MRI) system, comprising a solenoidal magnet arrangement (30) comprising primary magnet coils (32) arranged symmetrically about an axis ... | 05/11/2010 |
| 7683624 | Magnetic field adjustment device and magnetic field adjustment method for superconducting magnet A magnetic field adjustment device for a superconducting magnet, wherein magnetic material shim mechanisms are arranged in an axial direction of an inside periphery of the cylindrical superconducting magnet, each of the magnetic material shim mechanisms including a ... | 03/23/2010 |
| 7635981 | Magnetic resonance imaging apparatus A magnetic resonance imaging apparatus is provided in which vibration of a gradient magnetic field coil is reduced, the vibration is not transmitted to a static magnetic field correcting unit, and space can be saved. ... | 12/22/2009 |
| 7605589 | Method for automatic shimming for nuclear magnetic resonance spectroscopy A method for homogenizing a static magnetic field with a magnetic field distribution B0(r) for nuclear magnetic resonance spectroscopy by adjusting the currents Ci through the shim coils, thus creating spatial field distributions Ci·S | 10/20/2009 |
| 7592812 | Magnetic resonance imaging apparatus and static magnetic field correction method A magnetic resonance imaging apparatus includes: a static magnetic field generating unit which generates a static magnetic field, a measuring unit which measures the strength distribution characteristic of the static magnetic field, a determination unit which determ... | 09/22/2009 |
| 7579838 | Systems, methods and apparatus for a partially elongated field of view in a magnetic resonance imaging system Systems, methods and apparatus are provided through which a partially elongated field-of-view in a magnetic resonance imaging system is generated either by an asymmetric primary coil or a conventional symmetrical primary coil with a supplementary high odd-order shim... | 08/25/2009 |
| 7554327 | Method for determination and evaluation of a shim parameter set for controlling a shim device in a magnetic resonance apparatus In a method for determination and evaluation of a shim parameter set for controlling a shim device in a magnetic resonance (MR) apparatus, the shim device is set using a first shim parameter set, a first field distribution is measured in a body region encompassing a... | 06/30/2009 |
| 7535231 | Method for adjustment of a shim device of a magnetic resonance apparatus In a method for adjustment of a shim device of a magnetic resonance apparatus before an image acquisition in a body region that has a volume of interest, a field distribution is measured in a region encompassing the volume of interest produced with a shim device set... | 05/19/2009 |
| 7532009 | Method and magnetic resonance apparatus for monitoring apparatus interaction with magnetically-attracted objects A magnetic resonance apparatus has a magnetic field generation device for generating a strong magnetic field, and at least one detection device for automatic detection of an object attracted onto or into the magnetic resonance apparatus due to interaction with the m... | 05/12/2009 |
| 7525314 | Method and device for active compensation of magnetic and electromagnetic disturbance fields A first sensor of the device for compensating magnetic and/or electromagnetic disturbance fields in a predetermined volume range is provided beyond the predetermined volume range for producing a signal that is determined by the magnetic and/or electromagnetic field ... | 04/28/2009 |
| 7514929 | Magnetic resonance imaging apparatus and static magnetic field correction method A magnetic resonance imaging apparatus includes a collector which collects magnetic resonance signals emitted from a region of interest of a subject, and a correction magnetic field generator which generates a correction magnetic field to correct the nonuniformity o... | 04/07/2009 |
| 7492158 | Method for determining construction parameters of magnet structures designed to generate magnetic fields in predetermined volumes of space and method for correcting magnetic fields in predetermined volumes of space, particularly in MRI apparatus A method for determining construction parameters of magnet structures designed to generate magnetic fields in predetermined volumes of space, comprising the steps of: a) defining a predetermined volume of space in which a static magnetic field is to be generated; b)... | 02/17/2009 |
| 7459908 | Passive shimming for MR spectroscopy at high magnetic fields A method of providing shim sheets for adjusting a magnetic field in a magnetic resonance device by passive shimming, comprises the steps of field mapping of a region of interest in the MR device for obtaining an uncorrected magnetic field distribution including fiel... | 12/02/2008 |
| 7459909 | Magnetic field generating apparatus and MRI apparatus To achieve a good balance among the magnetic field intensity, region of homogeneous magnetic field intensity and cost, a magnetic field generating apparatus for generating a magnetic field in a vertical direction comprises: a pair of magnets having respective magnet... | 12/02/2008 |
| 7427908 | Magnetic shimming configuration with optimized turn geometry and electrical circuitry A magnetic shimming configuration for a high-field magnet having optimized turn geometry and electrical circuitry. The present invention accomplishes this by combining the corrective functionalities of the standard X and ZX shims into two single, simplified electric... | 09/23/2008 |
| 7423431 | Multiple ring polefaceless permanent magnet and method of making A permanent magnet assembly for an imaging apparatus having a permanent magnet body having a first surface and a stepped second surface which is adapted to face an imaging volume of the imaging apparatus, wherein the stepped second surface contains at least four ste... | 09/09/2008 |
| 7417435 | Method for generating a homogeneous magnetization in a spatial examination volume of a magnetic resonance installation In a method and magnetic resonance apparatus wherein a homogenous magnetization is generated in a spatial examination volume of the apparatus during examination of a subject, individual resonator segments of a body coil, that are electromagnetically decoupled from e... | 08/26/2008 |
| 7394255 | Single-sided magnetic resonance magnet assembly Magnetic resonance apparatus is provided comprising a magnet having a plurality of pairs of coils arranged in respective substantially parallel planes. The coils in each pair are operable in a counter-running manner when in use so as to generate a region of magnetic... | 07/01/2008 |
| 7375528 | Shielded, asymmetric magnets for use in magnetic resonance imaging Magnetic resonance systems are provided which employ a shielded, asymmetric magnet to produce an offset dsv. The magnets include at least a first coil C1, which carries current in a first direction, and two coils C2 and C3, which are... | 05/20/2008 |
| 7372270 | Compensating for non-uniformity of excitation field in MRI A method and system are described for compensating for non-uniformity of excitation field B1+ in magnetic resonance imaging (MRI) of an object. The variation in the RF excitation field B1+ is measured over a region of interest (ROI) in the object, the B1+ field caus... | 05/13/2008 |
| 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 |
| 7372393 | Method and system for determining unwrapped phases from noisy two-dimensional wrapped-phase images A method converts an input image of noisy wrapped phases to an output image of absolute unwrapped phases. The noisy wrapped phases in the input image are represented as a set of re-wrapped phases and a set of phase shifts. The set of re-wrapped phases are partitione... | 05/13/2008 |
| 7368915 | Shim board system In a shim board system with at least one shim board formed by an insulating substrate and at least one conductor trace on the substrate for generation of a shim magnetic field, in particular for homogenization of the basic magnetic field of a magnetic resonance appa... | 05/06/2008 |
| 7366559 | Nuclear magnetic resonance apparatus and method for assessing whole body composition A method is disclosed for measuring whole body composition. The method includes confining movement of the body to a selected volume, inducing a static magnetic field in the volume, inducing a pulsed radio frequency magnetic field in the volume, and receiving nuclear... | 04/29/2008 |
| 7365540 | Hybrid magnet configuration A co-axial magnet configuration for the production of a magnetic field and investigational volume which is suitable for measurement of magnetic resonance has at least one superconducting solenoid coil or solenoid coils which are radially nested within each other, wh... | 04/29/2008 |
| 7365623 | Permanent magnet, magnetic device for use in MRI including the same, and manufacturing processes thereof The present invention provides a permanent magnet, comprising a cylinder formed with a permanent magnetic material. The cylinder comprises along a radial direction, a magnetic core and a magnetic sheath that are coaxial. The magnetic core is assembled in the magneti... | 04/29/2008 |
| 7358726 | System of generating a magnetic field and MRI system using the system of generating a magnetic field An MRI system using an open type magnet, wherein two coils different in radius for generating gradient magnetic fields in a vertical direction are arranged in the open type magnet for generating a static magnetic field in the vertical direction. Currents are caused ... | 04/15/2008 |
| 7359540 | Systems and methods for correcting inhomogeneity in images A method for generating an estimate of inhomogeneity includes generating a first estimate of inhomogeneity, generating a second estimate of inhomogeneity, and generating a final estimate of inhomogeneity using at least the first and second estimates. ... | 04/15/2008 |
| 7358728 | Magnetic resonance imaging apparatus and magnetic resonance imaging data processing method A magnetic resonance imaging apparatus 20 includes a phase difference calculation unit 44 configured to perform a one-dimensional Fourier transform on complex data not phase-encoded extracted from complex data of a nuclear resonant signal collected by ... | 04/15/2008 |
| 7358734 | Single-sided NMR sensor with microscopic depth resolution A low-cost single-sided NMR sensor to produce depth profiles with microscopic spatial resolution is presented. The open geometry of the NMR sensor provides a non-invasive and non-destructive testing method to characterize the depth structure of objects of arbitrary ... | 04/15/2008 |
| 7359745 | Method to correct magnetic field/phase variations in proton resonance frequency shift thermometry in magnetic resonance imaging PRF shift MRI data is acquired. The PRF shift MRI data may include signals affected by both a desired PRF shift and an undesired PRF shift. Thus, example systems and methods describe manipulating the PRF shift MR! data to make it substantially free of the effects of... | 04/15/2008 |
| 7358735 | NMR probe head with heated housing An NMR probe head for investigating a temperature-sensitive test object in a volume under investigation with at least one RF receiver coil which is cooled to cryogenic temperatures during operation, and is surrounded by a housing, wherein at least one heatable separ... | 04/15/2008 |
| 7355499 | Magnet assembly A magnet assembly comprising first and second sets of coils (1, 2) for generating respective magnetic fields, wherein the coils are constructed and arranged such that under working conditions, a first homogeneous region (3) can be generated within the ... | 04/08/2008 |
| 7352184 | MRI apparatus with high-resistance magnet Eddy current generated around a magnetic circuit in an MRI apparatus is one of the causes of deviation from an ideal magnetic field gradient waveform and causes image distortion, loss of strength, ghost generation, loss of signal, and spectral distortion. An object ... | 04/01/2008 |
