利用脉冲DSPI技术测量心动位移分布

The Measurement of Cardiac Displacement Using DSPI

提出了一种基于脉冲数字散斑干涉（ＤＳＰＩ）系统的心动位移测量技术。该技术利用激光照射体表产生的动态生物散斑相关条纹图提取并记录心动周期时间历程中瞬态空－时位移场分布，进而通过条纹自动分析技术获得高精度重建的光学心动图。

We present a DSPI based technique for measuring cardiac displacement. Body surface illuminated by a coherent laser will diffuse light and generate dynamic speckle field in the space. By using correlation fringe pattern produced from double exposure speckle patterns we can record temporal spatial displacement distribution in the cardiac cycle with double pulsed digital speckle pattern interferometry. Furthermore, it can also be possible to obtain reconstructed optical cardiogram with high accuracy through the technique of automatic fringe analysis.