| 摘要 |
PURPOSE:To enable execution of simultaneous measurement at a number of points and to know a detected magnetic signal easily in relation to a point of detection by disposing a number of detecting coils in the bottom part of a cooling vessel. CONSTITUTION:A number of detecting coils 1b are disposed in the bottom part of a cooling vessel (Dewar) 1a. The detecting coils 1b are connected to input coils 1c of superconducting quantum interference type devices (SQUID) 1d respectively and constitute superconducting magnetic flux transformers. Accordingly, measurement of biomagnetism can be executed at each position of the detecting coil 1b and thus multipoint simultaneous measurement can be executed. Since the position of the detecting coil 1b is memorized beforehand, a detection signal can be displayed at a position corresponding to a point of detection. This makes it easy to know a waveform as a whole. Since a time cursor is displayed corresponding to each waveform of the detection signal and also the detection signal at a time specified by the time cursor is extracted, in addition, a chart of magnetic field contour and the like can be prepared at a desired timing. |
