Importance

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Abstract

A magnetic resonance imaging magnet includes a cryocooler penetration assembly and a superconducting coil assembly. The cryocooler penetration assembly has a thermal station within a thermal box within a vacuum vessel. The superconducting coil assembly has a magnet cartridge within a thermal shield within a vacuum enclosure. A flexible bellows hermetically connects the vacuum vessel and the vacuum enclosure. A first rigid thermal busbar is rigidly attached to the thermal shield, and a first flexible thermal busbar thermally connects the thermal box and the first rigid thermal busbar. A second rigid thermal busbar is rigidly attached to the magnet cartridge, and a second flexible thermal busbar thermally connects the second rigid thermal busbar and the thermal station. The weight of the cryocooler penetration assembly is supported independent of the superconducting coil assembly which, together with the flexible connections, isolates the vibrations of the cryocooler coldhead (which is attached to the cryocooler penetration assembly) from the superconducting coil assembly thereby improving imaging quality.

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First Claim