基于非刚性运动分析理论的心脏运动估计

Estimation of Cardiac Motion Based on Non-rigid Motion Theory

针对心脏的运动分析问题,本文提出一种采用非刚性运动分析理论,根据X射线冠状动脉造影图像序列中血管的形态变化分析心脏三维运动的算法。该方法根据已经被临床实验证实的有关心脏运动的先验知识,将复杂的心脏运动分解为整体运动和局部运动,按照从整体到局部、从粗糙到精细的顺序定量估计各运动组成部分的参数。实验结果表明,该算法可以得到心动周期中心脏运动的全面量化描述。

An approach for analyzing 3D cardiac motion from X-ray coronary artery angiogram sequences based on non-rigid motion principles was presented. According to actual characteristics of cardiac motion which have been confirmed by medical observations, complex cardiac motion is decomposed into global rigid motion, global deformation and local motion and deformation. Parameters of all components are estimated from global to local and coarse to fine to obtain quantitative description of cardiac dynamics. Experimental results demonstrate the feasibility and efficiency of the method.