- 期刊
- OpenAccess
Distribution of Vibration of Chest Surface with Heart Movement
並列摘要
A technique for imaging distribution of chest's surface vibration due to heartbeat has been established. This technique is based on measurement of minute vibration of the chest surface using 64 sensors and image processing unit. Relations of the vibrational distribution and the heart motion were discussed. The results showed that vibration of the chest surface included three or four frequency bands; less than 50Hz, 150-200Hz, 500-600Hz, and 700-800Hz. Clear contour images of the heart were derived from vibration of less than 50 Hz band. And contour of contraction/expansion of atrioventricular and ventricle and location of valves were derived from whole frequency band. This method would be applicable to monitor the cardiac function for long time, e.g. to investigate some changes of the heart movement by abnormal heart rhythm on the basis of an electrocardiogram (ECG). We expected that the technique would assist much better understanding of heart function visually.