弹性配准在冠状动脉三维运动分析中的应用  

Application of Elastic Registration in Motion Analysis for Coronary Artery

作　　者：孙正[1] 康元元[1] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003

出　　处：《光电工程》2008年第10期63-69,共7页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(30500129)

摘　　要：针对冠状动脉的运动分析问题,本文提出基于弹性配准的血管骨架三维运动估计方法。在对X射线冠脉造影图像序列进行三维血管骨架序列重建的基础上,寻找两个时刻同一血管分支上点之间的对应关系,得到各点的运动向量。通过使适当的目标函数最小化,运用动态规划算法,得到最优匹配。通过采用运动场已知的模拟数据对算法精度进行定量估计,并采用临床图像序列进行实验,结果表明,算法具有较高的精度和较快的运算速度。An approach for estimating three-dimensional motion field of cardiac vessel axes recovered from X-ray angiographic sequences based on elastic registration is proposed. Displacement vector of each skeleton point is obtained by matching vascular axes at consecutive instants in point-by-point manner. A proper cost function is minimized to acquire the global optimal match by using the algorithm of dynamic programming. The accuracy of the method was quantitatively assessed by using computer-simulated data with known transformation parameters. Experiments with clinical data were also carried out. Results show the validity of the method.

关 键 词：冠状动脉 血管造影 弹性配准 运动估计 动态规划 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]