复杂颅内动脉瘤的流固耦合模型的建模方法

Modeling of fluid-structure interaction model of complex intracranial aneurysms

目的:探讨复杂颅内动脉瘤的流固耦合模型的建模方法。方法:通过3D脑血管造影取得1位患者左侧颈内动脉巨大螺旋形梭状动脉瘤的原始数据,使用MIMICS 12.0对原始数据进行处理获得动脉瘤血管段STL格式的表面模型,将表面模型导入Geomagic Studio 12中处理得到双层NURBES曲面,使用UGS NX 8.0处理曲面得到流固耦合的颈内动脉瘤几何模型。把几何模型导入到ANSYS Workbench 14.0进行流固耦合计算评价其可靠性。结果:迅速快捷地构建出流固耦合的几何模型,模型形态几乎和患者实体一致,模型导入到ANSYS Workbench 14.0能够很好地进行流固耦合分析。结论:联合运用MIMICS 12.0、Geomagic Studio 12和UGS NX 8.0能够快速构建可靠的复杂颅内动脉瘤的流固耦合模型,为这种脑血管疾病数值模拟研究提供可靠方法。

Objective：To study methods of modeling of fluid-structure interaction model of complex intracranial aneurysms. Methods：The original data series of left internal carotid artery spiral giant fusiform aneurysm in a patient were got by 3D cerebral angiography.The original data series was processed to obtain a surface model of STL format of the aneurysm＇s vessel segment using MIMICS 12.0.The surface model was imported into Geomagic Studio 12 and was processed to get double NURBES surfaces,which were processed to get the fluid-structure interaction model of internal carotid artery aneurysm using UGS NX 8.0. The model was imported into ANSYS Workbench 14.0 and fluid-structure interaction calculation was performed to evaluate its reliability. Results：A fluid-structure interaction model was built rapidly and quickly,which was almost the same as actual entities of the patient and was good for fluid-structure interaction analysis. Conclusion：In combination with MIMICS 12.0,Geomagic Studio 12 and UGS NX 8.0,reliable fluidstructure interaction model of complex intracranial aneurysms can be quickly built. This provides a reliable method for the numerical simulation of cerebrovascular disease.