タケシマ　ユリコ   竹島　由里子    所属   メディア学部 メディア学科    職種   教授
言語種別	英語
発行・発表の年月	2010/08
形態種別	国際会議論文
査読	査読あり
標題	The Effect of 3D Visualization on Optimal Design for Strut Position of Intracranial Stent
執筆形態	共著
掲載誌名	Proc the 3rd ASME2010 3rd US-European Fluids Engineering Summer Meeting and 8th International Conference on Nanochannels, Microchannels and Minichannels
掲載区分	国外
出版社・発行元	ASME
巻・号・頁	pp.1859-1867
著者・共著者	Hitomi Anzai, Toshio Nakayama, Yuriko Takeshima, Makoto Ohta
概要	In this study, we simulated blood flow with several aneurysm geometries to confirm the effect of 3D visualization on determination of optimal stent position. First, flow simulation using real aneurysm geometries without a stent was performed as a "pre-stenting situation." Meshes were generated using a commercial code (Gambit 2.3). CFD was carried out using a commercial code (Fluent 6.3) based on steady flow. The streamlines around an aneurysm were visualized using a 3D visualization system (EnSight Gold 8.2) in Realization Workspace (RWS) to visualize the inflow zone. Secondly, a rectangular solid as a strut model was set in the inflow zone using computer-aided design (CAD) techniques. CFD was then performed as a "post-stenting situation" under the same conditions as the pre-stenting situation using the same mesh generator and CFD code. Three-dimensional visualization showed an inflow zone in the aneurysm. A bundle of flow streamlines hit the wall of the neck of the aneurysm and entered it. The inflow zone was a narrow local part in contrast to the outflow. After setting a strut, a change of flow pattern could be observed. The flow speed and the wall shear stress (WSS) were both reduced. When the strut position was moved away from the original position, the flow speed and the WSS were not reduced. These results may suggest that 3D visualization can provide information useful for strut positioning to realize effective reduction of flow into an aneurysm, especially a side wall aneurysm.