发明名称 |
RF transmit calibration for open MRI systems |
摘要 |
A pair of quadrature radio frequency coils (32, 34) disposed adjacent an imaging region (10) are typically loaded differently due to factors such as subject geometry, subject mass, and a relative distance from the subject. A tip angle adjustment circuit (50) monitors a combined tip angle adjacent a mid-plane of the examination region, such as by analyzing delivered and reflected power to each of the coils. An adjustment circuit (54) adjusts relative RF power or amplitude to produce a selected, combined tip angle in the examination region.
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申请公布号 |
US6552538(B2) |
申请公布日期 |
2003.04.22 |
申请号 |
US20010833003 |
申请日期 |
2001.04.11 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS, N.V. |
发明人 |
DEMEESTER GORDON D.;BURL MICHAEL;MORICH MICHAEL A. |
分类号 |
G01R33/36;A61B5/055;G01R33/58;(IPC1-7):G01V3/00 |
主分类号 |
G01R33/36 |
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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