METHODS AND APPARATUS FOR COMPENSATING FOR DRIFT IN MAGNETIC FIELD STRENGTH IN SUPERCONDUCTING MAGNETS
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United States of America Patent
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Issued Date -
Aug 21, 2014
app pub date -
Feb 20, 2014
filing date -
Feb 20, 2013
priority date (Note) -
Abandoned
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Abstract
An MRI system has compensating material located at a radial position between the imaging region and the basic field magnet in a location that will be heated over a range of temperatures during operation of the MRI system. The compensating material has a magnetic susceptibility that varies with temperature over the range of temperatures in a manner opposite to the variation in magnetic susceptibility of the material of the OVC bore tube of the basic field magnet over the range of temperatures.
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