SYSTEM AND METHOD FOR ACOUSTIC DETECTION OF CORONARY ARTERY DISEASE AND AUTOMATED EDITING OF HEART SOUND DATA

摘要

Systems and methods for acoustic detection of coronary artery disease (CAD) and automated editing of heart sound data are provided.

主权项

1. A system for acoustic detection of coronary artery disease and automated editing of heart sound data, said system comprising: a transducer for detecting acoustic heart signals; one or more reference microphones for detecting external and internal noises; a filter with a cutoff frequency of 90 Hz applied to a signal from the one or more reference microphones; an adaptive filter which matches and cross correlates frequency responses of the transducer signal and the signal of the one or more reference microphones; and one or more computers connected to the transducer and reference microphones which executes software for detecting coronary artery disease by processing the detected acoustic heart signals and which serves as a means for enhancing narrowband components in the signal from the one or more reference microphones, for dividing the enhanced signal into non-overlapping segments and calculating log-variance of each segment, for applying a threshold value to potential noisy segments, and for removal of deleterious noise segments from the transducer signal.