March 6 - 8, 2017 | Berlin
LEADING ENGINEERING SIMULATION CONFERENCE
Intracranial aneurysms, which are dilatations of the cerebral vasculature, can be prone to rupture. To assess the patient-specific rupture risk, hemodynamic parameters are acquired using Computational Fluid Dynamics (CFD). However, the impact of the vessel wall is mostly neglected. To overcome this limitation, precise vessel wall imaging was performed in a 33-year old male human, who died due to aneurysm rupture. Furthermore, fluid-structure interaction (FSI) simulations were carried out considering patient-specific and constant vessel wall thickness, respectively. Although the hemodynamic variables (e.g. wall shear stress) do not vary significantly after the FSI computations, the importance of occurring wall stresses is shown. Especially, the comparison between individual and constant vessel wall demonstrates that significantly different stress distributions are predicted, particularly close to the actual rupture site. Overall, the study highlights that the consideration of wall information is a crucial step towards the assessment of an individual rupture risk for cerebral aneurysms. Hence, CFD might become a valuable supporting tool for physicians during therapy planning in the future.