| 摘要 |
PURPOSE:To obtain a cardiomagnetic wave signal with high accuracy by removing a noise component with high accuracy based only on the cardiomagnetic wave measurement signal. CONSTITUTION:The operation frequency of a cryogenic refrigerator 1 is changed by an operation frequency control section 4 in response to the time the frequency of heat beats equals to the operation frequency of the cryogenic refrigerator 1. The output signal from a SQUID fluxmeter 2 is supplied in this state to a signal processing section 3. The high-accuracy cardiomagnetic wave signal, from which the noise component is removed, is thereby obtd. |
