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公开(公告)号：US11579224B2
公开(公告)日：2023-02-14
申请号：US17527735
申请日：2021-11-16
IPC分类号： G01R33/3815 , G01R33/38 , G01R33/3873 , H01F6/04
摘要： In a magnet system: —a superconducting main field magnet (7) generates a magnetic field in a first sample volume (16), —a superconducting additional field magnet (22) generates another field in a second sample volume (24), —a cryostat (2) has a cooled main coil container (6), an evacuated RT (room temperature) covering (4), and an RT bore (14) which extends through the main and the additional field magnets, and —a cooled additional coil container (21) in a vacuum. The RT covering has a flange connection (17) with an opening (19) through which the RT bore extends, a front end of the additional coil container protrudes through the opening into the RT covering such that the additional field magnet also protrudes through the opening into the RT covering, and a closure structure (20) seals the RT covering between the flange connection and the RT bore.
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公开(公告)号：US11551840B2
公开(公告)日：2023-01-10
申请号：US17386517
申请日：2021-07-27
申请人： Seungyong Hahn , David Larbalestier
发明人： Seungyong Hahn , David Larbalestier
IPC分类号： H01F6/00 , G01R33/3815 , H01F6/06
摘要： An active feedback controller for a power supply current of a no-insulation (NI) high-temperature superconductor (HTS) magnet to reduce or eliminate the charging delay of the NI HTS magnet and to linearize the magnet constant.
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公开(公告)号：US20230003816A1
公开(公告)日：2023-01-05
申请号：US17853093
申请日：2022-06-29
发明人： Michael Mallett , Adrian Mark Thomas , Stefan Popescu , Andreas Krug , Matthias Gebhardt , Stephan Biber , Andreas Greiser
IPC分类号： G01R33/38 , G01R33/383 , G01R33/3815 , G01R33/385
摘要： A magnetic resonance imaging device having a field generation unit configured to provide a magnetic field in an imaging volume of the magnetic resonance imaging device. The field generation unit has at least one magnet. A surface of the field generation unit directed towards the imaging volume of the at least one magnet has a concave shape, wherein a direction of access to the imaging volume is oriented essentially perpendicular to a main direction of magnetic field lines in the imaging volume.
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公开(公告)号：US20220381857A1
公开(公告)日：2022-12-01
申请号：US17661423
申请日：2022-04-29
IPC分类号： G01R33/34 , G01R33/3815
摘要： According to one embodiment, a magnetic resonance imaging system includes a first imaging apparatus, a first cooling system, a second imaging apparatus, a second cooling system and a cooling control device. The first imaging apparatus includes a first magnet configured to generate a static magnetic field. The first cooling system is configured to cool the first magnet. The second imaging apparatus includes a second magnet configured to generate a static magnetic field. The second cooling system is configured to cool the second magnet. The cooling control device is configured to switch a cooling target of each of the first cooling system and the second cooling system.
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公开(公告)号：US20220365154A1
公开(公告)日：2022-11-17
申请号：US17628555
申请日：2020-11-26
发明人： Yaohui Wang , Qiuliang Wang
IPC分类号： G01R33/421 , G01R33/3815 , G01R33/385
摘要： The present application provides a method of designing a high shielding gradient coil for a planar superconducting magnetic resonance imaging (MRI) system and a gradient coil thereof, the method determines a shielding area according to an outer profile of a metal conductor around the position of the gradient coil in the planar superconducting MRI system, and performs partitioned shielding of a stray field. The constraint values of stray fields at different partitioned zones of the shielding area are adjusted according to the shielding requirements. The primary coils of both the transverse gradient coil and the longitudinal gradient coil optimized by the design method of the high shielding gradient coil contain a reverse coil, which generates a magnetic field that offsets leakage magnetic field of other coils, thus achieving the purpose of reducing the stray field of the gradient coil.
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公开(公告)号：US11500050B2
公开(公告)日：2022-11-15
申请号：US17356599
申请日：2021-06-24
IPC分类号： G01R33/3815 , G01R33/385 , H01F6/02
摘要： A magnetic resonance imaging (MRI) system includes a superconducting magnet assembly with a superconducting field coil for generating a stationary uniform main magnetic field. A gradient system includes a gradient coil for generating gradient magnetic fields and a gradient amplifier which is connectable to the gradient coil for driving the gradient coil. A switch assembly is adapted for galvanically coupling the superconducting field coil to the gradient amplifier. In this way, it is possible for energizing and discharging a superconducting magnet of an MRI system in an easy and cost-efficient way.
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公开(公告)号：US20220260657A1
公开(公告)日：2022-08-18
申请号：US17620318
申请日：2020-10-06
发明人： Ezra Petrus Antonius VAN LANEN , Matthew Jonathan VOSS , John Robert ROGERS , John Arthur URBAHN , Alexander James PYNE
IPC分类号： G01R33/3815 , H01F6/02 , H01F6/06 , H01F6/00 , H01F6/04
摘要： An apparatus (200) includes a cryostat (202) containing a volume of myogenic fluid. One or more electrically superconducting coils (204) is disposed within the cryostat. The one or more electrically superconducting coils is configured to produce a magnetic field when an electrical current is passed therethrough. One or more high temperature superconducting (HTS) current leads (206) is permanently disposed within the cryostat and coupled to the one or more electrically superconducting coils. One or more sensors (222) is positioned at or near the one or more HTS current leads to monitor the status of the HTS current leads. An HTS protection switch (208) is selectively coupled to the one or more HTS current leads. A magnet controller (220) controls the HTS protection switch to divert current from the one or more HTS current leads upon detection via the sensors of a quench of the one or more HTS current leads.
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公开(公告)号：US11408956B2
公开(公告)日：2022-08-09
申请号：US17155595
申请日：2021-01-22
发明人： Stephan Biber , Markus Vester
IPC分类号： G01R33/565 , G01R33/36 , G01R33/3815 , G01R33/54
摘要： The disclosure relates to a magnetic resonance tomography system and to a method for operation of the magnetic resonance tomography system. The magnetic resonance tomography system has a magnetic unit, which is configured to change a homogeneous magnetic field B0 with a magnetic field strength, which may vary between a first predetermined value on exciting nuclear spins and a second predetermined value on receiving magnetic resonance signals, in a measuring volume in a short, predetermined time, controlled by the magnetic resonance tomography system.
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公开(公告)号：US20220244332A1
公开(公告)日：2022-08-04
申请号：US17659719
申请日：2022-04-19
IPC分类号： G01R33/3815 , G01R33/38 , H01F6/04
摘要： An intelligent control system (S) and methods (M, M1, M2) for dynamically controlling components of an MRI system (10), the intelligent control system (S) involving a processor (700), configurable to: determine a current-use state of each component; optimize energy usage among the components based on the current-use state of each component, whereby an optimal energy usage is provided; alter an energy consumption profile of each component based on the optimal energy usage, whereby an altered energy consumption for each component is provided; automatically activate power to each component based on the altered energy consumption when the MRI system (10) is to be operated; and automatically deactivate power to each component based on the altered energy consumption when the MRI system (10) is not to be operated, whereby the MRI system (10) is automatically operable when needed and inoperable when not needed, continually powering the components is eliminated, and an average energy consumption of the MRI system (10) is reduced over its lifespan.
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10.发明申请公开(公告)号：US20220244331A1
公开(公告)日：2022-08-04
申请号：US17162051
申请日：2021-01-29
IPC分类号： G01R33/3815 , G01R33/38 , H01F6/04
摘要： A magnetic resonance imaging (MRI) system includes a set of magnet coils for generating a magnetic field. The set of magnet coils are composed of a superconducting material. The system further includes a mechanical cryocooler in thermal contact with the set of magnet coils and operable to reduce and maintain a temperature of the set of magnet coils below a transition temperature of the superconducting material, and an energy storage device coupled to the set of magnet coils. The energy storage device may be capable of receiving and storing energy dissipated from the set of magnet coils during rapid shutdown of the set of magnet coils. The system may also include a controller coupled to the energy storage device. The controller may be programmed to recharge the set of magnet coils using the energy stored in the energy storage device during the rapid shutdown of the set of magnet coils.
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