发明名称 |
Temperature compensated NMR magnet and method of operation therefor |
摘要 |
An MRI system includes a magnet which produces the main polarizing magnetic field. Variations in strength of this field are corrected by a temperature compensation system that calculates a compensating flux needed to maintain the field at constant strength. The compensating flux is calculated from changes in sensed magnet temperature and a magnet temperature coefficient. One or more correction coils are wound around the magnet and driven with the current necessary to produce the compensating flux.
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申请公布号 |
US6252405(B1) |
申请公布日期 |
2001.06.26 |
申请号 |
US19990440813 |
申请日期 |
1999.11.15 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
WATKINS RONALD DEAN;BARBER WILLIAM DANIEL;FRISCHMANN PETER GEORGE |
分类号 |
A61B5/055;G01R33/38;(IPC1-7):G01V3/00 |
主分类号 |
A61B5/055 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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