Author(s)

Tomoaki Yamazaki¹, Gaku Tanaka¹, Ryuhei Yamaguchi^2*, Yodai Okazaki³, Hitomi Anzai², Fujimaro Ishida⁴, Makoto Ohta²

¹Graduate School of Engineering, Chiba University, Chiba, Japan.
²Institute of Fluid Science, Tohoku University, Sendai, Japan.
³School of Engineering, Tokyo Institute of Technology, Yokohama, Japan.
⁴Department of Neurosurgery, Mie Chuo Medical Centre, Tsu, Japan.

Initiation, growth, and rupture of cerebral aneurysms are caused by hemodynamic factors. It is extensively accepted that the cerebral aneurysm wall is assumed to be rigid using computational fluid dynamics (CFD). Furthermore, fluid-structure interactions have been recently applied for simulation of an elastic cerebral aneurysm model. Herein, we examined cerebral aneurysm hemodynamics in a realistic moving boundary deformation model based on 4-dimensional computed tomographic angiography (4D-CTA) obtained by high time-resolution using numerical simulation. The aneurysm of the realistic moving deformation model based on 4D-CTA at each phase was constructed. The effect of small wall deformation on hemodynamic characteristics might be interested. So, four hemodynamic factors (wall shear stress, wall shear stress divergence, oscillatory shear index and residual residence time) were determined from the numerical simulation, and their behaviors were assessed in the basilar bifurcation aneurysm.

Basilar Bifurcation Aneurysm, 4-Dimensional Computed Tomographic Angiography, Moving Boundary Method

Yamazaki, T. , Tanaka, G. , Yamaguchi, R. , Okazaki, Y. , Anzai, H. , Ishida, F. and Ohta, M. (2021) Numerical Simulation of Flow Behavior in Basilar Bifurcation Aneurysms Based on 4-Dimensional Computed Tomography Angiography. World Journal of Mechanics, 11, 71-82. doi: 10.4236/wjm.2021.114006.