一种限制点集的Delaunay网格剖分方法  

Delaunay mesh grid method based on restricted points set

作　　者：董路[1] 汪友生[1] 宁克友 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100124

出　　处：《国外电子测量技术》2014年第10期25-28,共4页Foreign Electronic Measurement Technology

摘　　要：对血管壁区域进行三角形网格划分是研究计算血管壁弹性的关键。采用基于Delaunay网格划分算法生成接近规则化的三角形网,在确定血管壁内外边缘上点集时,将点对之间的角度和距离作为取点的限制条件,较好的保持边缘形状特征。之后,由三角形中心点与内外膜边缘点的位置关系判断该三角形是否处在血管壁区域进而去除处在血管腔中的三角形。与传统的非限制点集取点方法相比,本方法产生的点集小,且能消除血管腔内产生的无效三角形,并使得血管壁的剖分更趋均匀合理。Triangular mesh on the arterial wall area is the key to calculate arterial wall elasticity .The algorithm based on Delaunay meshing has been used to generate the triangular mesh of regularization .Regard the angle and distance between two points as restrictions when choose points at the inner and outer edges of the arterial wall in order to keep the edge shape features better .Then determine whether the triangles is on the arterial wall area or not according to the position relationship of the center points of the triangle’s and points at the inner and outer edges of the arterial w all and remove those in the lumen area Compared with the conventional non-restricted points algorithm ,this method need less points and can eliminate invalid triangles inside the lumen area .Thus making the mesh of arterial wall become more evenly and rea-sonable .

关 键 词：血管壁 Delaunayl三角剖分 限制点集 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]