Stabilizer for MRI system
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United States of America Patent
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Feb 6, 1996
Grant Date -
N/A
app pub date -
Mar 14, 1994
filing date -
Mar 18, 1993
priority date (Note) -
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Abstract
An electron spin resonator (ESR) is used to compensate for temporally varying instabilities in the main magnetic field B.sub.o of a nuclear magnetic resonance imaging apparatus during the derivation of NMR imaging data from an object being imaged. The ESR monitor is placed at a point outside but close to the object such that the ESR monitor is affected by the temporally varying fields. Variances across the ESR caused by gradient fields are compensated for such that the output of the ESR is independent of the strength of the gradient fields. The ESR output is used to reduce the influence of said instabilities on the imaging data.
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