发明名称 |
Magnetic resonance imaging apparatus provided with means for preventing closed loop circuit formation across and between inside and outside of cryostat |
摘要 |
A MRI apparatus includes a super-conducting magnet including a superconducting coil circuit having a super-conducting coil and a permanent current switch for controlling permanent current flowing through the super-conducting coil; at least one electrical circuit which is electrically connected to at least one electrical element and disposed at the outside of the super-conducting magnet; a gradient magnetic filed generating means; a high frequency magnetic field generating means; and shielded examination room which accommodates the super-conducting magnet. The apparatus further comprises means for interrupting noise current generated based on tomographic image measurement of the subject. Said means is disposed outside the super-conducting magnet and inside the shielded examination room while being inserted between the electrical circuit and the super-conducting magnet.
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申请公布号 |
US7304478(B2) |
申请公布日期 |
2007.12.04 |
申请号 |
US20050528759 |
申请日期 |
2005.03.22 |
申请人 |
HITACHI MEDICAL CORPORATION |
发明人 |
TSUDA MUNETAKA;TAKEUCHI HIROYUKI;SAKAMOTO ISAO |
分类号 |
G01V3/00;A61B5/055;G01R33/3815;H01F7/20 |
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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