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1. 发明公开

EP4390431A1 METHOD AND SYSTEM FOR MAGNETIC RESONANCE IMAGING PROCESSING 审中-公开
公开(公告)号：EP4390431A1
公开(公告)日：2024-06-26
申请号：EP22214558.3
申请日：2022-12-19
申请人： Koninklijke Philips N.V.
发明人： FORTHMANN, Peter , LEUSSLER, Christoph Günther
IPC分类号： G01R33/387 , G01R33/565 , G01R33/44 , G01R33/3815 , G01R33/56
CPC分类号： G01R33/5608 , G01R33/387 , G01R33/56563 , G01R33/3815 , G01R33/445
摘要： According to the invention a method of processing an acquired magnetic resonance image is provided, with the following steps:
S 1) providing a first magnetic resonance image which has been acquired with a magnetic resonance imaging device (1) at a first main magnetic field with a first magnetic flux density at shimming conditions for shimming a second main magnetic field to uniformity, wherein the second main magnetic field has a second magnetic flux density which is different from the first magnetic flux density,
S2) providing a second magnetic resonance image which has been acquired with the magnetic resonance imaging device (1) at the second main magnetic field at shimming conditions for shimming the second main magnetic field to uniformity,
S3) providing a first operator,
S4) providing a second operator,
S5) retrieving a magnetic resonance image which would be expected instead of the first magnetic resonance image if the first magnetic resonance image had been acquired with the magnetic resonance imaging device (1) at the first main magnetic field at shimming conditions for shimming the first main magnetic field to uniformity by applying the second operator onto the first magnetic resonance image and applying the first operator onto the magnetic resonance image which has been received by applying the second operator onto the first magnetic resonance image.

2. 发明公开

EP4364173A1 MAGNET SYSTEM 审中-实审
公开(公告)号：EP4364173A1
公开(公告)日：2024-05-08
申请号：EP22735580.7
申请日：2022-06-29
申请人： Oxford Instruments Nanotechnology Tools Limited
发明人： VARNEY, Andrew John
IPC分类号： H01F6/06 , G01R33/3815
CPC分类号： H01F6/06 , G01R33/3815

3. 发明公开

EP4352763A1 SYSTEM FOR CONTROLLING A SUPERCONDUCTING COIL WITH A MAGNETIC PERSISTENT CURRENT SWITCH 审中-实审
公开(公告)号：EP4352763A1
公开(公告)日：2024-04-17
申请号：EP22734222.7
申请日：2022-06-02
申请人： Koninklijke Philips N.V.
发明人： FORTHMANN, Peter , MENTEUR, Philippe, Abel
IPC分类号： H01F7/122 , H01F7/14 , H01F7/16 , H01F6/04 , F25D19/00 , G01R33/38 , G01R33/3815 , H01L39/16 , F01L9/21 , F16K31/06
CPC分类号： H01F6/04 , H01F7/14 , H01F7/122 , H01F7/1646 , G01R33/3815 , G01R33/3804 , H01F2007/166920130101 , H01F2007/08620130101 , F16K31/082

4. 发明公开

EP4300122A1 MAGNETIC RESONANCE IMAGING DEVICE AND METHOD FOR DESIGNING A SHIELDING ASSEMBLY FOR A MAGNETIC RESONANCE IMAGING DEVICE 审中-实审转让
公开(公告)号：EP4300122A1
公开(公告)日：2024-01-03
申请号：EP22181885.9
申请日：2022-06-29
申请人： Siemens Healthcare GmbH
发明人： DIETZ, Peter
IPC分类号： G01R33/385 , G01R33/421 , G01R33/3815
摘要： Magnetic resonance imaging device (1, 1', 1"), comprising
- a superconducting main field coil assembly inside a vacuum vessel (2) of a cryogenic assembly, wherein the vacuum vessel (2) defines a cylindric patient bore (8), in which a homogeneity volume (10) of a main field created by the superconducting main field coil assembly is located, and
- an, in particular not actively shielded, cylindrical gradient coil assembly (11) having at least one gradient coil and being located inside the patient bore (8), wherein the cryogenic assembly comprises a shielding assembly to shield the main field coil assembly from stray fields of the gradient coil assembly (11),
wherein
- the main field coil assembly comprises multiple superconducting coils (4, 5, 6, 21) successively arranged inside the vacuum vessel (2) along a longitudinal direction (9) of the patient bore (8), wherein at least one pair of superconducting coils (4, 5, 6, 21) are distanced in the longitudinal direction (9) to form a longitudinally extending transparency region (13), and
- the shielding assembly comprises multiple shielding rings (16, 18, 19, 20) pairwise longitudinally separated by one of the at least one transparency region (13).

5. 发明授权

EP3987301B1 A METHOD FOR REDUCING THE TENDENCY OF A THERMAL RADIATION SHIELD FOR A SUPERCONDUCTING MAGNET OF A MAGNETIC RESONANCE IMAGING SYSTEM TO VIBRATE 有权
公开(公告)号：EP3987301B1
公开(公告)日：2023-11-29
申请号：EP20746869.5
申请日：2020-07-07
发明人： MALLETT, Michael John Disney
IPC分类号： G01R33/38 , G01R33/3815 , G01R33/385 , H01F6/04

6. 发明公开

EP4277522A1 RF RECEIVE COIL CIRCUIT FOR MRI SYSTEMS 审中-实审
公开(公告)号：EP4277522A1
公开(公告)日：2023-11-22
申请号：EP22776534.4
申请日：2022-03-23
申请人： Coilone, LLC
发明人： ZENG, Li , ZHENG, David
IPC分类号： A61B5/05 , A61B5/055 , G01R33/34 , G01R33/3415 , G01R33/3815

7. 发明授权

EP3822992B1 METHOD FOR CHARGING A SUPERCONDUCTOR MAGNET SYSTEM, WITH A MAIN SUPERCONDUCTOR BULK MAGNET AND A SHIELD SUPERCONDUCTOR BULK MAGNET 有权
公开(公告)号：EP3822992B1
公开(公告)日：2023-09-06
申请号：EP19209166.8
申请日：2019-11-14
发明人： March, Stephen Alfred , Hinderer, Jörg , Heiss, Stephan
IPC分类号： H01F6/00 , G01R33/3815 , H01F6/04 , H01F13/00 , G01R33/421

8. 发明授权

EP3213103B1 SUPPORT OF SUPERCONDUCTING COILS FOR MRI SYSTEMS 有权转让
公开(公告)号：EP3213103B1
公开(公告)日：2023-07-26
申请号：EP15787935.4
申请日：2015-10-22
发明人： CALVERT, Simon James , NOYS, Jonathan
IPC分类号： G01R33/3815 , H01F6/06

9. 发明公开

EP4212898A1 MAGNETIC RESONANCE DEVICE COMPRISING A SAMPLE SPINNING APPARATUS WITH AN ELECTROMAGNETIC FIELD FOR SPINNING THE SAMPLE 审中-公开
公开(公告)号：EP4212898A1
公开(公告)日：2023-07-19
申请号：EP22151713.9
申请日：2022-01-17
申请人： ETH Zurich
发明人： The designation of the inventor has not yet been filed
IPC分类号： G01R33/30 , G01R33/60 , G21K1/00 , G01R33/38 , G01R33/3815 , H01F6/00 , H01F6/04
摘要： A magnetic resonance device comprises a sample spinning apparatus (20) configured to spin a sample (30) about a sample spinning axis (R), the sample spinning apparatus being configured to exert a torque on the sample by interaction of the sample with an electromagnetic sample spinning field.

10. 发明公开

EP4177624A1 A METHOD FOR HOMOGENIZING A MAGNETIC FIELD PROFILE OF A SUPERCONDUCTOR MAGNET SYSTEM, IN PARTICULAR WITH FEEDBACK BY A MEASURED MAGNETIC FIELD PROFILE 有权
公开(公告)号：EP4177624A1
公开(公告)日：2023-05-10
申请号：EP21207337.3
申请日：2021-11-09
申请人： Bruker Switzerland AG
发明人： March, Stephen Alfred , Hinderer, Jörg , Borgnolutti, Franck
IPC分类号： G01R33/38 , G01R33/389 , G01R33/24 , H01F6/00 , G01R33/3815
摘要： A method for homogenizing a magnetic field profile of a superconductor magnet system (2), wherein the superconductor magnet system (2) comprises
- a cryostat (4) having a room temperature bore (7a),
- a superconductor bulk magnet (5), contained in the cryostat (4) and arranged coaxially with the room temperature bore (7a), and
- a cryogenic cooling system (13) adapted for cooling the superconductor bulk magnet (5),
wherein the superconductor bulk magnet (5) comprises at least N axially stacked bulk sub-magnets (6a-6c), with N≥3, wherein in an initial state, the bulk sub-magnets (6a-6c) carry respective initial currents with relative proportions according to an initial distribution scheme, and the method comprises a posterior correction step (50) which changes the initial currents into final currents with relative proportions according to a final distribution scheme which is different from the initial distribution scheme, wherein a magnetic field profile of the superconductor bulk magnet (5) based on the final currents is more homogenous than a magnetic field profile based on the initial currents, wherein the cryogenic cooling system (13) is adapted for independently controlling the temperature of each bulk sub-magnet (6a-6c), and wherein for changing the initial currents into the final currents, temperatures of at least a part of the bulk sub-magnets (6a-6c) are chosen at least temporarily different from each other, such that
- for a first part of the bulk sub-magnets (6a-6c), the bulk sub-magnets (6a-6c) of this first part are at least almost magnetically saturated, and
- for a second part of the bulk sub-magnets (6a-6c), the bulk sub-magnets (6a-6c) of this second part are significantly away from magnetic saturation,
is characterized in that for changing the initial currents into the final currents, the temperatures of the bulk sub-magnets (6a-6c) are chosen by controlling a heating power and/or a cooling power at the bulk sub-magnets without measuring the temperatures of the bulk sub-magnets, wherein for at least the part of the bulk sub-magnets (6a-6c), the heating powers are set at least temporarily different from each other and/or the cooling powers are set at least temporarily different from each other. The invention provides a method with which a magnetic field profile of a superconductor magnet system may be homogenized in a simple and inexpensive way.

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