Open MRI magnet with uniform magnetic field

Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type

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335299, 324318, H01F 100, H01F 500, G01V 300

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active

054102871

ABSTRACT:
An open magnetic resonance imaging (MRI) magnet having first and second spaced-apart superconductive coil assemblies each including a toroidal-shaped coil housing containing a superconductive main coil and a superconductive bucking coil. The bucking coil is spaced radially inward and radially apart from the main coil. The bucking coil carries an electric current equal in amperage, and opposite in direction, to the main coil. The bucking coils overcome the gross magnetic field distortions in the imaging volume of the main coils (created by the open space between the magnet's superconductive coil assemblies) to produce a magnetic field of high uniformity within the imaging volume.

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