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7606019 |
Magnet coil system with active drift compensation for two independent current paths
A magnet coil system ( 2 ) which is at least partially superconducting at a cryogenic temperature, comprising at least two partial coils ( 3, 4, 5 ) which are connected in series and are each...
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7605589 |
Method for automatic shimming for nuclear magnetic resonance spectroscopy
A method for homogenizing a static magnetic field with a magnetic field distribution B 0 (r) for nuclear magnetic resonance spectroscopy by adjusting the currents C i through the shim coils, thus...
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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...
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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...
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7579837 |
Arrangement for magnetic field measurement
The invention concerns an arrangement for magnetic field measurement of a measurement object (in particular a gradient coil in a magnetic resonance apparatus) with a magnetic field sensor that is...
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7567158 |
Superconducting magnet arrangement with hysteresis free field coil
A magnet arrangement (M, M′, M″, M′″) for generating a magnetic field in the direction of a z-axis in a working volume (V) disposed on the z-axis about z=0, with a magnet coil system (A,...
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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...
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7543370 |
Method for production of a superconducting magnetic coil
In a method for production of a superconducting magnetic coil, winding of superconducting wires of the superconducting magnetic coil is implemented with at least one UV-curable plastic, and the...
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7541811 |
Apparatus for electron spin resonance CT
A compact, lightweight, and easy-to-use ESR-CT apparatus including a magnetic field leak line (5-G line) which is capable of imaging a small animal, such as a mouse, within 15 minutes, and of...
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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...
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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...
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7528602 |
Magnetic shielding apparatus and magnetic field measuring apparatus using same
A magnetic shielding apparatus having a high shielding effect. With the magnetic shielding apparatus having an opening (for example, a cylindrical magnetic shielding apparatus provided with a...
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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...
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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...
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7514928 |
Superconducting magnet configuration with reduced heat input in the low temperature regions
The invention concerns a magnet configuration comprising a superconducting magnet coil ( 1 ) within which a gradient system is to be switched. All low temperature oscillation systems (R 1 ) with a...
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7508209 |
Magnetic resonance apparatus with a gradient coil unit with integrated passive shim devices
A magnetic resonance apparatus has a gradient coil unit with passive shim devices inserted into side receptacles in the molded body of the gradient coil unit. Each shim device has a carrier with a...
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7508208 |
Magnetic resonance imaging scanner with booster iron
A magnetic resonance imaging scanner includes a magnet ( 20 ) generating a temporally constant magnetic field, magnetic field gradient-generating structures ( 30 ) superimposing selected magnetic...
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7504826 |
Superconducting magnet and MRI apparatus using the same
A superconducting magnet of the present invention includes a switching element that closes its output side (operation side) when the voltage on its input side is smaller than a predetermined value...
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7504825 |
Method and probe for compensating for magnetic noise fields in space volumes, particularly in magnetic resonance imaging apparatus
A method for compensating in a space volume for a magnetic noise field outside the space volume includes determining a strength of the magnetic noise field outside the space volume; defining a...
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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...
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7479860 |
Magnetic field generating assembly and method
A magnetic field generating assembly comprising a set (A 1 -A 3 ;B 1 -B 3 ;C 1 -C 3 ) of, typically substantially coaxial, coils substantially symmetrically arranged about a plane orthogonal to the...
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7468606 |
Vacuum housing for a magnetic resonance apparatus
Disclosed is a vacuum housing for a magnetic resonance apparatus having a recess for leading through lead wires to elements located inside the vacuum housing, and a first lead-through bushing...
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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...
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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...
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7449885 |
Magnetic resonance imaging method and apparatus
A magnetic resonance imaging method comprising a step for applying one or more gradient magnetic field pulses continuously, a step for calculating a residual magnetic field being generated from a...
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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...
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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...
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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...
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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...
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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 C 1 , which carries current in a first...
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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...
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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...
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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...
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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...
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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...
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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,...
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7348780 |
Asymmetric radio frequency coils for magnetic resonance
Asymmetric radio frequency (RF) coils for magnetic resonance applications are provided. Also provided are time harmonic methods for designing such coils as well as symmetric coils. In addition,...
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7348779 |
Magnetic resonance imaging method and system
A magnetic resonance imaging method comprising a step for applying one or more gradient magnetic field pulses continuously, a step for calculating a residual magnetic field being generated from a...
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7332912 |
Method for correcting inhomogeneities of the static magnetic field, particularly of the static magnetic field generated by the magnetic structure of a machine for acquiring MRI image
An exemplary method for correcting inhomogeneities of the static magnetic field generated by the magnetic structure of a machine for acquiring nuclear magnetic resonance images includes determining...
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7330031 |
Matrix shim system with grouped coils
A matrix shim system for generating magnetic field components superimposed on a main static magnetic field, comprising a plurality of annular coils, is characterized in that it comprises g groups G...
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7323875 |
Shimming structure and method for a magnetic resonance imaging apparatus
In a magnetic resonance imaging apparatus and a method for shimming such an apparatus, at each of mirror-symmetrical assemblies respectively disposed at opposite faces of a static magnetic field...
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7319329 |
Cold mass with discrete path substantially conductive coupler for superconducting magnet and cryogenic cooling circuit
A cold mass for a superconducting magnet system in one example comprises a superconducting magnet, a cryogenic cooling circuit, and a magnet and cooling circuit support. The magnet and cooling...
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7315168 |
Shimming with MRI gradient
A method of correcting active shimming element of a magnetic resonance device, including providing a set of correction values for each shimming element for a given N sub volumes, wherein N is an...
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7295012 |
Methods and apparatus for MRI shim elements
A MRI shim element includes a plurality of thin wires extending substantially parallel to each other wherein each wire has cross sectional dimensions less than δ sk , wherein δ sk is the wire's...
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7279901 |
Magnetic resonance apparatus and operating method for generating a homogenous RF field in the examination volume
In a method and magnetic resonance system for generating a homogenous, radio-frequency excitation field in a spatial examination volume of the magnetic resonance system for a subject examination,...
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7274192 |
Combined open and closed magnet configuration for MRI
A magnetic resonance imaging (MRI) magnet having a first section and a second section is disclosed. The first section has a first housing, and a first set of magnet coils arranged about a common...
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7271591 |
Methods and apparatus for MRI shims
A method includes heating a MRI shim with a heater to reduce a temperature rise per unit of time during a gradient operation of a MRI system.
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7271590 |
MRI magnet apparatus for vertically and circularly suppressing the magnetic fringe field
In order to suppress fringe field due to the magnetic field generated from shield coils along the center axis of main coils and the shield coils that are disposed with their center axes being...
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7256672 |
Magnetic field generating device and method of shimming thereof
A magnetic field generating device is disclosed having an arrangement of permanent magnets, each permanent magnet (PM) having a north end and a south end, and each aligned in the same north-south...
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7253624 |
Magnet system and magnetic resonance imaging system utilizing the magnet system
In a magnet system utilizing a pair of magnet bodies each having a cylindrical hollow, by effectively utilizing the hollow spaces of the magnet bodies, the ability of adjusting through magnetic...
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