System and apparatus for compensating for magnetic field distortion in an mri system
AssigneeGeneral Electric Company
InventorsWeijun Shen, Timothy J. Havens, Longzhi Jiang, Tesfaye K. Kidane
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Abstract
A magnet apparatus for a magnetic resonance imaging system, the magnet apparatus includes a cylindrical vacuum vessel, a closed loop cooling system disposed within the vacuum vessel and a cylindrical thermal shield disposed between the vacuum vessel and the closed loop cooling system. A set of passive compensation coils are disposed within the vacuum vessel and used to compensate for magnetic field distortion caused by mechanical vibrations within the magnet apparatus.
Claims18
A magnet apparatus for a magnetic resonance imaging system, the magnet apparatus comprising:
- a cylindrical vacuum vessel;
- a closed loop cooling system disposed within the vacuum vessel;
- a cylindrical thermal shield disposed between the vacuum vessel and closed loop cooling system;
- and
- a set of passive compensation coils disposed within the vacuum vessel.
A magnet apparatus for a magnetic resonance imaging system, the magnet apparatus comprising:
- a cylindrical vacuum vessel;
- at least one cylindrical coil former disposed within the vacuum vessel, the at least one coil former having at least one superconducting coil mounted thereon;
- a cylindrical thermal shield disposed between the vacuum vessel and the at least one coil former;
- and
- a set of passive compensation coils disposed within the vacuum vessel.
Dependencies are inferred from the claim text.