超電導磁石装置

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专利权人:

株式会社日立メディコ

发明人:

津田 宗孝,竹内 博幸,坂本 勲

申请号：

JP2008308070

公开号：

JP5149134B2

申请日:

2008.12.03

申请国别(地区):

JP

年份:

2013

代理人:

摘要：

PROBLEM TO BE SOLVED: To provide a high magnetic field open-magnet MRI device capable of ensuring safe operation of a superconducting magnet, not being affected by interference from electromagnetic noise.

SOLUTION: A static magnetic field generating magnet 102 includes a pair of cryostat devices 117 connected via a connection tube 201, each being positioned above or below a space 118 where a subject is supposed to be placed and each filled with liquid helium with a superconducting coil inside. The cryostat pair 117 has an attached measurement unit 121 which monitors inside information and an attached emergency demagnetization unit 120 for attenuating a magnetic field. Their signal cables are connected to the inner circuit of a static electromagnetic field generating magnet 102 via a filter circuit 122. Even when a gradient magnetic field or high-frequency magnetic field is generated by the MRI device, the high frequency current excited by the generation is blocked by a filter circuit 122, and led to a ground point 123 through the outer casing of the cryostat pair 117, thereby having no influence on the inner circuit of the cryostat.

COPYRIGHT: (C)2009,JPO&INPIT

来源网站：

中国工程科技知识中心

来源网址：

http://www.ckcest.cn/home/