Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1996-01-04
1997-12-23
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
335301, G01R 3338, H01F 702
Patent
active
057010757
ABSTRACT:
A magnetic resonance imaging superconducting magnet including a cryostat, a gradient coil and superconducting gradient shield positioned around the gradient coil with an active resistive shimming member contiguous to the cryostat vessel; and the gradient shield being selectively cooled to superconducting operation after the magnetic shimming fields generated by the shimming member for field homogeneity within the bore of the magnetic resonance imaging magnet are induced onto, and maintained by, the superconducting gradient shield and operation of the resistive shimming member discontinued.
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Tsavalas Yannis P.
Xu Bu-Xin
Freedman Irving M.
General Electric Company
O'Shea Sandra L.
Phillips Roger C.
Pilarski John H.
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