| 摘要 |
The present invention aims at providing a diagnostic system for coronary artery disease and others and a diagnostic method using the above diagnostic system, which can detect vibration signal of murmur deriving from stenosis of coronary artery in its early stages, for it is possible to diagnose abnormal condition, prevent and treat heart disease. Disclosed is a diagnostic system for coronary artery disease comprising a detector of vibration signal of subject using pulsed laser beam, which is placed apart from the subject, and a detector of vibration signal of environmental noise, and vibration signal detected by the detector of vibration signal of subject and the detector of vibration signal of environmental noise is filtered for canceling internal noise and external noise, and the filtered vibration signal is amplified and recorded. The above detector of vibration signal of subject has one or a plurality of laser source head and vibration detective sensor with laser displacement gage and three-axial accelerometer, and the detector of vibration signal of environmental noise has three-axial accelerometer and supersensitive microphone.
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