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    • 3. 发明授权
    • Magnetoencephalograph
    • 脑电图
    • US5339811A
    • 1994-08-23
    • US969489
    • 1992-10-30
    • Hiroshi OhtaKazutomo Hoshino
    • Hiroshi OhtaKazutomo Hoshino
    • A61B5/05A61B5/04G01R33/035H01L39/22
    • A61B5/04008G01R33/035
    • A magnetoencephalograph comprising an oxide superconductor magnetic shielded vessel and a cryostat for cooling the magnetic shielded vessel, a multichannel SQUID and a cryostat for cooling the SQUID inserted together in the magnetic shielded vessel from one end of the magnetic shielded vessel, a magnetic-field detection unit situated in the vessel for detecting magnetic fields, and a coupling portion for coupling the SQUID and the magnetic-field detection unit with respect to the signals, and the SQUID and the magnetic-field detection unit being detachable. The magnetoencephalograph makes possible the detection of the very weak magnetic fields from the human brain and therewith reduction of the diameter of the opening of the magnetic shield vessel for inserting the SQUID. The reduction of the diameter of the SQUID opening in turn makes it possible to reduce the length of the magnetic shielded vessel, thereby preserving a high shielding effect of the magnetic shield vessel because of the L/D relationship. The magnetic shielded vessel is thus reduced to a practical size which is easy to handle and fabricatable at a low cost.
    • 包括氧化物超导体磁屏蔽容器和用于冷却磁屏蔽容器的低温恒温器的磁脑图,多通道SQUID和用于冷却从磁屏蔽容器的一端插入磁屏蔽容器中的SQUID的低温恒温器,磁场检测 位于用于检测磁场的容器中的单元,以及用于将SQUID和磁场检测单元相对于该信号耦合的耦合部分,SQUID和磁场检测单元可拆卸。 磁脑图使得能够检测来自人脑的非常弱的磁场,从而减少用于插入SQUID的磁屏蔽容器的开口的直径。 SQUID开口的直径的减小又使得可以减小磁屏蔽容器的长度,从而由于L / D关系而保持了磁屏蔽容器的高屏蔽效果。 因此,磁屏蔽容器被减少到易于处理和可以以低成本制造的实用尺寸。