A diagnostic system and method for disease of the coronary artery

摘要

PROBLEM TO BE SOLVED: To detect a murmur vibration due to a constriction and a lesion in an early stage, to diagnose an abnormal state and to permit it to be a preventing and medically treating index by providing a processing means for removing an internal murmur caused by means of a measuring instrument and an extraneous murmur, amplifying only the feeble stenosis and dilating distention vibration signal of a coronary artery on a body surface and recording data. ;SOLUTION: A high sensitivity capacitor microphone 23 for detecting the extraneous murmur of measurement environment is fixed to a laser beam source head together with the on-bed environmental murmur vibration selecting sensor 22 of an environmental murmur vibration detecting part and incorporated to the system of a complex sensor 21. Measurement is executed by fixing a projection beam to a left intercostal breast bone left edge positioned in front of the heart or sliding plural heads or the single head from the point over a left rear back surface at a localization without pulmonary tissue between the heart and a chest wall and by stopping a breath for about ten seconds. Besides, a high-pass filter and a low-pass filter are operated by 200 Hz and 100 Hz, the gain of an amplifier is set to almost 200-1,000 times and a measuring signal is recorded in a DTA recorder 29 together with an electrocardiogram signal.;COPYRIGHT: (C)2000,JPO