Patent ID: 6967480
Filing Date: 2005-11-22
Classification: G01R

Abstract:
1. A superconducting magnet for MRI, comprising: upper and lower coil assemblies arranged to generate a vertical magnetic field in a space between the coil assemblies, each of said coil assemblies including a doughnut-shaped superconducting coil, a coil frame on which said superconducting coil is wound, and a coil conduction member of a highly heat-conductive material interposed between said superconducting coil and said coil frame; a liquid receiver storing liquid helium; a thermal shield accommodating said upper and lower coil assemblies and said liquid receiver; a vacuum container accommodating said thermal shield; a refrigerator for cooling said liquid receiver and said thermal shield; and a thermal anchor provided in said liquid receiver, said thermal anchor being formed of a highly heat-conductive material and thermally connected to said coil conduction member of at least the upper coil assembly.