发明名称 |
Magnetic resonance imaging method and device |
摘要 |
A magnetic resonance imaging apparatus has means for detecting the movement of an object so as to correct the variation of the non-uniformity of static magnetic field because of the movement of the object and thereby to improve the quality of the MR image. When actually measured data is corrected by using a signal for correcting the static magnetic field obtained in a preliminary measurement, the influence of the non-uniformity of static magnetic field is eliminated from the image based on the information from the body movement detecting means by using a correcting signal measured at the same time phase of the periodic movement as that of the actually measured signal. A navigation echo measured during the same repetition time as that of the actually measured signal is used for detection of time phase by detecting means. As a result, the quality of image is not deteriorated by the variation of the non-uniformity of static magnetic field due to the movement of the body of the object, realizing imaging of high quality image.
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申请公布号 |
US6885885(B1) |
申请公布日期 |
2005.04.26 |
申请号 |
US20020979241 |
申请日期 |
2002.02.20 |
申请人 |
HITACHI MEDICAL CORPORATION |
发明人 |
TAKIZAWA MASAHIRO;TAKAHASHI TETSUHIKO |
分类号 |
A61B5/055;A61B5/11;G01R33/565;G01R33/567;(IPC1-7):A61B5/05 |
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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