TY - JOUR
T1 - Role of 0D peripheral vasculature model in fluid-structure interaction modeling of aneurysms
AU - Torii, Ryo
AU - Oshima, Marie
AU - Kobayashi, Toshio
AU - Takagi, Kiyoshi
AU - Tezduyar, Tayfun E.
PY - 2010/6
Y1 - 2010/6
N2 - Patient-specific simulations based on medical images such as CT and MRI offer information on the hemodynamic and wall tissue stress in patient-specific aneurysm configurations. These are considered important in predicting the rupture risk for individual aneurysms but are not possible to measure directly. In this paper, fluid-structure interaction (FSI) analyses of a cerebral aneurysm at the middle cerebral artery (MCA) bifurcation are presented. A 0D structural recursive tree model of the peripheral vasculature is incorporated and its impedance is coupled with the 3D FSI model to compute the outflow through the two branches accurately. The results are compared with FSI simulation with prescribed pressure variation at the outlets. The comparison shows that the pressure at the two outlets are nearly identical even with the peripheral vasculature model and the flow division to the two branches is nearly the same as what we see in the simulation without the peripheral vasculature model. This suggests that the role of the peripheral vasculature in FSI modeling of the MCA aneurysm is not significant.
AB - Patient-specific simulations based on medical images such as CT and MRI offer information on the hemodynamic and wall tissue stress in patient-specific aneurysm configurations. These are considered important in predicting the rupture risk for individual aneurysms but are not possible to measure directly. In this paper, fluid-structure interaction (FSI) analyses of a cerebral aneurysm at the middle cerebral artery (MCA) bifurcation are presented. A 0D structural recursive tree model of the peripheral vasculature is incorporated and its impedance is coupled with the 3D FSI model to compute the outflow through the two branches accurately. The results are compared with FSI simulation with prescribed pressure variation at the outlets. The comparison shows that the pressure at the two outlets are nearly identical even with the peripheral vasculature model and the flow division to the two branches is nearly the same as what we see in the simulation without the peripheral vasculature model. This suggests that the role of the peripheral vasculature in FSI modeling of the MCA aneurysm is not significant.
KW - Cerebral aneurysm
KW - Fluid-structure interaction
KW - Outflow boundary condition
KW - Structural tree model
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U2 - 10.1007/s00466-009-0439-7
DO - 10.1007/s00466-009-0439-7
M3 - Article
AN - SCOPUS:77951766384
VL - 46
SP - 43
EP - 52
JO - Computational Mechanics
JF - Computational Mechanics
SN - 0178-7675
IS - 1
ER -