发明名称 |
Magnetic resonance apparatus utilizing time-varying rate of magnetic resonant frequency |
摘要 |
The present invention provides a magnetic resonance imaging system capable of performing spectrum measurement even when a magnetic resonant frequency changes during MRS measurement. A time-varying rate of a water magnetic resonant frequency is measured in advance before the MRS measurement. The amount of change in water magnetic resonant frequency during the MRS measurement is predicted from the measured time-varying rate. With the predicted value as the reference, a transmission frequency of an RF magnetic field irradiated in a signal suppression pulse sequence, a transmission frequency of an RF magnetic field for excitation and inversion and a received frequency at the detection of a magnetic resonance signal in a sequence of the MRS measurement are respectively set. A high-precision spectrum measurement is hence enabled.
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申请公布号 |
US7518362(B2) |
申请公布日期 |
2009.04.14 |
申请号 |
US20050562643 |
申请日期 |
2005.12.28 |
申请人 |
HITACHI MEDICAL CORPORATION |
发明人 |
HIRATA SATOSHI;OCHI HISAAKI;TANIGUCHI YO;TAKAHASHI TETSUHIKO;TAKEUCHI HIROYUKI |
分类号 |
G01V3/00;A61B5/055;G01R33/389;G01R33/485 |
主分类号 |
G01V3/00 |
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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