US 11,675,036 B2
Shimming device for a magnetic resonance imaging system
Shuguang Liu, Shanghai (CN); Man Fan, Shanghai (CN); Jiwen Yang, Shanghai (CN); Yuan Gao, Shanghai (CN); Lifeng Wang, Shanghai (CN); and Tao Wang, Shanghai (CN)
Assigned to SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed by SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed on Jul. 5, 2021, as Appl. No. 17/305,331.
Claims priority of application No. 202110285132.3 (CN), filed on Mar. 17, 2021; and application No. 202120547987.4 (CN), filed on Mar. 17, 2021.
Prior Publication US 2022/0299586 A1, Sep. 22, 2022
Int. Cl. G01R 33/3875 (2006.01); G01R 33/421 (2006.01); G01R 33/34 (2006.01)
CPC G01R 33/3875 (2013.01) [G01R 33/34023 (2013.01); G01R 33/4215 (2013.01)] 11 Claims
OG exemplary drawing
 
1. 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, the main magnet including a plurality of main coils, a main skeleton for supporting the plurality of main coils, and a shielding coil assembly arranged in the cryostat and configured to shield the main magnetic field from leaking to an exterior of the MRI system, wherein the shielding coil assembly includes a plurality of shielding coils and a shielding skeleton for supporting the plurality of shielding coils, and the shielding skeleton is arranged outside the main skeleton; 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, each of the plurality of wire groove groups being in a saddle shape and including a plurality of wire grooves, each of the plurality of wire grooves being in a closed shape, the closed shapes formed by the plurality of wire grooves being nested, 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;
the first supporting component is fixed on a periphery of the main skeleton by a first fixing component;
the second supporting component is fixed on a periphery of the first supporting component by a second fixing component; and
wires arranged in the 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.