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US 12,748,169 B2Granted
Shimming device for a magnetic resonance imaging system
AssigneeShanghai United Imaging Healthcare Co., Ltd.
InventorsShuguang Liu, Man Fan, Jiwen Yang, Yuan Gao, Lifeng Wang, Tao Wang
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Abstract
The present disclosure relates to a shimming device. The shimming device may include at least one supporting component each of which is configured with a plurality of wire groove groups. Each of the plurality of wire groove groups may include a plurality of wire grooves. Each of the plurality of wire grooves may be in a closed shape. The closed shapes formed by the plurality of wire grooves may be nested. The shimming device may further include wires arranged in the wire grooves of the plurality of wire groove groups of the at least one supporting component.
Claims19
A magnetic resonance imaging (MRI) system, comprising:
- a cryostat;
- and
- a main magnet arranged in the cryostat and configured to generate a main magnetic field;
- and
- a superconducting shimming device arranged in the cryostat and configured to improve uniformity of the main magnetic field, wherein the superconducting shimming device includes:
- at least two supporting components each of which is configured with a plurality of wire groove groups arranged on an outer side wall of the supporting component, wherein each of the plurality of wire grooves is in a closed shape, the closed shapes formed by the plurality of wire grooves are nested, and the at least two supporting components include a first supporting component with a first distance to the main magnet and a second supporting component with a second distance to the main magnet, the first distance being smaller than the second distance;
- wires arranged in wire grooves of the plurality of wire groove groups of the at least two supporting components;
- and
- a third fixing component arranged on the outer side wall of one of the at least two supporting components and configured to fix the wires in the wire grooves of the plurality of wire groove groups, and the wires in the wire grooves are fixed between the one of the at least two supporting components and the third fixing component in a direction perpendicular to an axial direction of the main magnet.
6 more elements
A magnetic resonance imaging (MRI) system, comprising:
- a cryostat;
- and
- a main magnet arranged in the cryostat and configured to generate a main magnetic field;
- a shielding coil assembly arranged in the cryostat and coaxially arranged relative to the main magnet, wherein the main magnet is placed closer to a center of the cryostat than the shielding coil assembly;
- and
- a superconducting shimming device arranged in the cryostat and configured to improve uniformity of the main magnetic field, wherein
- the superconducting shimming device is arranged between the main magnet and the shielding coil assembly and closer to the main magnet than the shielding coil assembly, and a gap between the superconducting shimming device and the main magnet is filled with a cooling medium,
- the superconducting shimming device includes:
- at least one supporting component each of which is configured with a plurality of wire groove groups arranged on an outer side wall of the supporting component, wherein a distribution of wire grooves of each wire groove group on a corresponding supporting component is adapted to a current density distribution on the corresponding supporting component;
- wires arranged in wire grooves of the plurality of wire groove groups of the at least one supporting component;
- and
- a third fixing component arranged on the outer side wall of the supporting component and configured to fix the wires in the wire grooves of the plurality of wire groove groups, and the wires in the wire grooves are fixed between the supporting component and the third fixing component in a direction perpendicular to an axial direction of the main magnet.
9 more elements
A magnetic resonance imaging (MRI) system, comprising:
- a cryostat;
- and
- a main magnet arranged in the cryostat and configured to generate a main magnetic field;
- and
- a superconducting shimming device arranged in the cryostat and configured to improve uniformity of the main magnetic field, wherein the superconducting shimming device includes:
- at least two supporting components each of which is configured with a plurality of wire groove groups arranged on an outer side wall of the supporting component, wherein the at least two supporting components include a first supporting component with a first distance to the main magnet and a second supporting component with a second distance to the main magnet, the first distance being smaller than the second distance;
- and
- wires arranged in wire grooves of the plurality of wire groove groups of the at least two supporting components, wherein a distribution density of wires on the first supporting component is greater than a distribution density of wires on the second supporting component.
5 more elements
Dependencies are inferred from the claim text.