分步模拟三维动脉血管树方法及优越性分析  

Introduction and Advantage Analysis of the Stepwise Method for the Construction of Vascular Trees

作　　者：张艳[1] 解海卫[1] 诸凯[1] 

机构地区：[1]天津商业大学机械工程学院天津市制冷技术重点实验室,天津300134

出　　处：《生物医学工程学杂志》2010年第4期902-906,共5页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(54076067)

摘　　要：为建立符合循环系统实际特征的血管树模型,提出了一种新的血管树生成方法。该方法将整个血管树划分为输送血管和供给血管两类,分步进行模拟,即先根据测量数据确定输送血管的分布规律,利用统计规律和优化原则建立全部输送血管;然后在生成的输送血管树上,利用结构强制优化(CCO)方法生成供给血管。以人舌动脉为例,分别用CCO方法和分步模拟血管树方法建立了人舌三维动脉血管树模型。并以真实人舌血管铸型为参照,分析、对比了两种方法所得模拟血管树的直径随血管等级变化的分布曲线及不同方向的一级分支的分布比例和平均直径。结果表明:分步模拟方法得到的血管树比CCO方法得到的血管树更符合实际。A new method for constructing the model of vascular trees was proposed in this paper.By use of this method,the arterial trees in good agreement with the actual structure could be grown.In this process,all vessels in the vascular tree were divided into two groups： the conveying vessels,and the delivering branches.And different branches could be built by different ways.Firstly,the distributing rules of conveying vessels were ascertained by use of measurement data,and then the conveying vessels were constructed in accordance to the statistical rule and optimization criterion.Lastly,delivering branches were modeled by constrained constructive optimization（CCO） on the conveying vessel-trees which had already been generated.In order to compare the CCO method and stepwise method proposed here,two 3D arterial trees of human tongue were grown with their vascular tree having a special structure.Based on the corrosion casts of real arterial tree of human tongue,the data about the two trees constructed by different methods were compared and analyzed,including the averaged segment diameters at respective levels,the distribution and the diameters of the branches of first level at respective directions.The results show that the vascular tree built by stepwise method is more similar to the true arterial of human tongue when compared against the tree built by CCO method.

关 键 词：模拟 血管树 分步 结构强制优化 优越性 

分 类 号：R318[医药卫生—生物医学工程]