基于快速建立四面体网格的有限元心脏建模  

Heart Modeling of Finite Element Based on Rapid Generation of Tetrahedral Mesh

作　　者：肖鹏飞[1] 黄芳[1] 李显良[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《计算机仿真》2008年第9期223-226,230,共5页Computer Simulation

基　　金：湖南省自然科学基金(05JJ40130)

摘　　要：针对目前通过医学成像技术获得心脏序列图像来提取相关心脏结构参数,判断心脏的功能的三维心脏建模技术的热点问题,提出了一种基于快速建立四面体网格的有限元心脏建模的方法,结合心脏这种形变模型的各种约束条件,模拟心脏的动态形变,利用有限元与生物力学原理构建心脏表面重建的有限元方程,由心脏表面三角网格数据点快速构建一系列不相重叠的四面体网格单元,以满足单元的应力矢量及单元节点位移矢量计算的需要,为模拟重建心脏运动奠定基础。实验结果表明了有效性和可行性。Focused on the heart 3D modeling through medical imaging technology to obtain the heart sequence of images for extracting relevant parameters of cardiac structure,a new method based on the rapid generation of tetrahedral mesh for heart modeling of the finite element is presented in this paper.Various restrictive conditions of deformable model are combined to simulate dynamic deformation of the heart.The finite element equation of the heart surface reconstruction is constructed by using biomechanics principle and finite element,and the non-overlap tetrahedral mesh cells are constructed rapidly by triangle mesh data points on heart surface to meet the requirement of calculating cell＇s stress and displacement.The proposed method provides a foundation for reconstructing heart movement,and the experimental results also show its effectiveness and validity.

关 键 词：心脏建模 有限元方法 形变模型 四面体网格 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]