Patent ID: 6157276
Filing Date: 2000-12-05
Classification: G01R,Y10S

Abstract:
A magnet assembly for an MRI system, comprising;a vessel cylinder having an outer wall and a bore axis;a pair annular-shaped end plates fastened to respective ends of the vessel cylinder outer wall and extending radially inward therefrom;a cylindrical-shaped inner wall fastened to the end plates and centered around the bore axis radially inward of the vessel cylinder outer wall, the inner wall being comprised of an epoxy and glass composite material which forms a vacuum vessel with the vessel cylinder outer wall and the end plates, and including a vapor barrier said vapor barrier comprising a first non-conductive layer, and a ribbon comprised of a metal foil layer and a non-conductive material wrapped around said first non-conductive layer such that the metal foil layers on successive wraps overlap; anda cylindrical-shaped gradient coil assembly mounted within the bore of said magnet assembly and positioned radially inward of, and adjacent to, the inner wall.