CAJ | 학술논문

为了对脑动脉可能发生病变的位置加以分析，进行了此次脑动脉血流动力学数值模拟。本文采用ANSYS Workbench双向流固耦合的方法，模拟入口压力随时间波动，脑动脉血管内的血液流动情况和血管壁的变形情况。结果发现在血管交叉处会出现流速紊乱、液面压力较为集中的现象，且在交叉处的变形较为明显。临床观测发现，脑动脉液面的压力、血液的流速和血管的变形情况都是使脑动脉产生病变的因素，因此本研究方法有助于发现脑动脉的病变可能部位，为临床诊断提供指导。
위료대뇌동맥가능발생병변적위치가이분석，진행료차차뇌동맥혈류동역학수치모의。본문채용ANSYS Workbench쌍향류고우합적방법，모의입구압력수시간파동，뇌동맥혈관내적혈액류동정황화혈관벽적변형정황。결과발현재혈관교차처회출현류속문란、액면압력교위집중적현상，차재교차처적변형교위명현。림상관측발현，뇌동맥액면적압력、혈액적류속화혈관적변형정황도시사뇌동맥산생병변적인소，인차본연구방법유조우발현뇌동맥적병변가능부위，위림상진단제공지도。
Because wall shear stress (WSS) is known to play an important role in initiation, growth and rupture of cerebral aneurysm, predicting the hemodynamic forces near the aneurysmal site helps with understanding aneurysms better. This paper presents a computational vascular fluid-structure interaction (FSI) methodology and its application to patient-specific aneurysm models of the middle cerebral artery bifurcation using the FE software ANSYS Workbench. The results show that the interaction between the blood flow and arterial deformation alters the hemodynamic forces acting on the arterial wall and the interaction strongly depends on the individual aneurysm shapes. Flow impingement on the arterial wall plays a key role in determining the interaction and hemodynamic forces. The results reinforce the importance of FSI in patient-specific analysis of cerebral aneurysms.