发明授权
US5856744A Method and apparatus for B.sub.0 eddy current compensation by B.sub.1
phase modulation
失效
通过B1相位调制进行B0涡流补偿的方法和装置
- 专利标题： Method and apparatus for B.sub.0 eddy current compensation by B.sub.1 phase modulation
- 专利标题（中）： 通过B1相位调制进行B0涡流补偿的方法和装置
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申请号： US772684申请日： 1996-12-23
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公开(公告)号： US5856744A公开(公告)日： 1999-01-05
- 发明人: Walter F. Block , Adam B. Kerr , John M. Pauly
- 申请人： Walter F. Block , Adam B. Kerr , John M. Pauly
- 申请人地址： CA Palo Alto
- 专利权人： Board of Trustees of the Leland Stanford Junior University
- 当前专利权人： Board of Trustees of the Leland Stanford Junior University
- 当前专利权人地址： CA Palo Alto
- 主分类号： G01R33/565
- IPC分类号： G01R33/565 ; G01V3/00
摘要：
In accordance with the invention, spatially invariant B.sub.0 eddy currents induced by a slice-selection gradient, G.sub.Z in an MRI system, are compensated by phase modulating the RF excitation pulse with a compensating function. In one embodiment, the compensating function is based on a measure of the integral of the B.sub.0 eddy current. In another embodiment, a scaled copy of the excitation gradient can be used as an approximation of the compensating function.
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