Patent ID: 7535225
Filing Date: 2009-05-19
Classification: G01R

Abstract:
1. A magnetic resonance apparatus comprising: a basic field magnet that generates a basic magnetic field in an examination volume, said basic field magnet comprising superconducting coils contained in a helium reservoir that is cooled by liquid helium, an outer vacuum chamber forming a reservoir that surrounds said helium reservoir with a vacuum between said outer vacuum chamber and said helium reservoir, and a cryoshield between the outer vacuum chamber and the helium reservoir, said basic field magnet defining an interior chamber in which said examination region is located; a gradient coil located in said interior chamber of said basic field magnet that generates a gradient magnetic field in said examination volume, operation of said gradient coil in combination with operation of said basic magnetic field producing vibrations in said cryoshield; and said cryoshield comprising a structural reinforcement that counteracts said vibrations.