可实现特殊网格划分的个性化动脉瘤实体模型的构建

目的　通过建立一个可以用于有限元分析，可进行分区域网格划分的个性化主动脉弓动脉瘤实体模型，探索一种能满足特殊网格划分要求的个性化实体模型的建立方法。方法　采用逆向工程的思想方法，借助Geomagic和Pro/E软件，以原始STL格式的表面模型为依据，建立了一个个性化主动脉弓动脉瘤实体模型，并加入理想化支架模型，导入ANSYS有限元分析软件最终完成实体模型的建立和分块。结果　建立的有限元模型，可进行针对边界层和支架的分区域网格划分，并完成了一个血流动力学模拟仿真。结论　建立的模型基本满足对特定区域网格细划分的需要，可以为支架介入治疗动脉瘤的血流动力学仿真提供基础。所建模型的方法是可行的，可以为将来建立其他类似模型提供参考。

Method of Reconstruct patient-specific Model of Aortic Arch Aneurysm for Particular Demands on Meshing

Objective In order to investigate a method for model construction that could meet particular demands on meshing, a patient-specific model of aortic arch aneurysm was established which can be divided and meshed in finite element software. Method Based on a surface model in STL format, reverse engineering concept was adopted to reconstruct a solid model of aortic arch aneurysm by means of integrating CAD software of Geomagic and Pro/E, and simplified stents model was also created in it. This model was transferred to ANSYS software and divided into several parts. Result Particular meshing was performed especially in boundary layer and around the stents, and hemodynamics simulation was carried out using the finite element model. Conclusions This solid model could be meshed according to particular requirements in several parts respectively, and employed to simulate hemodynamics in aortic arch aneurysm treated with endovascular stent. The method of modeling was applicable and could be used as a reference for similar model construction.