Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1995-10-23
1996-05-28
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
335301, 324320, G01V 300, H01F 100, H01F 500
Patent
active
055215718
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. A generally annular-shaped resistive coil is associated with each coil assembly, being generally coaxially aligned with the associated coil assembly and being spaced radially inward and radially apart from the associated coil assembly's superconductive main coil. The resistive coils overcome the gross magnetic field distortions in the imaging volume of the superconductive 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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Pending U.S. Patent Application Serial No. 373,995, Filed Oct. 17, 1995, by B. Dorri, "Method for Passively Shimming an Open Magnet".
Pending U.S. Patent Application Serial No. 373,996, Filed Oct. 17, 1995, by B. Dorri, "Method for Passively Shimming A Magnet".
Pending U.S. Patent Application Serial No. 08/509,565, Filed Jul. 31, 1995, by T. Havens et al., "Open Architecture Magnetic Resonance Imaging Superconducting Magnet Assembly".
Dorri Bizhan
Laskaris Evangelos T.
Barrera Raymond M.
Erickson Douglas E.
General Electric Company
Picard Leo P.
Snyder Marvin
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