发明名称 |
Magnetic field variation measuring method and magnetic field variation compensating method for MRI apparatus, and MRI apparatus |
摘要 |
For the purpose of compensating for a variation in the static magnetic field of an MRI apparatus, RF probes 1P1 and 1P2 are placed and a reference static magnetic field is measured as a reference frequency in the beginning; the static magnetic field is measured at an appropriate time as a frequency to determine the amount of static magnetic field variation from their difference; and the transmission frequency of an RF pulse and the receiving detection frequency of an NMR signal are corrected or the gradient current for a gradient coil is corrected so as to compensate for the amount of the magnetic field variation.
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申请公布号 |
US6489765(B2) |
申请公布日期 |
2002.12.03 |
申请号 |
US20010961174 |
申请日期 |
2001.09.22 |
申请人 |
GE MEDICAL SYSTEMS GLOBAL TECHNOLOGY COMPANY, LLC |
发明人 |
GOTO TAKAO |
分类号 |
G01R33/387;A61B5/055;G01R33/389;G01R33/565;(IPC1-7):G01V3/00 |
主分类号 |
G01R33/387 |
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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