CPC G01R 33/3875 (2013.01) [G01R 33/34023 (2013.01); G01R 33/4215 (2013.01)] | 11 Claims |
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.
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