Intracranial aneurysms are fairly common in the general population. Although most aneurysms go undetected, acute rupture resulting in subarachnoid hemorrhage (SAH) can be a devastating consequence associated with 32%-67% mortality and 15%-30% morbidity. Ruptured aneurysms are treated within 24-48 hours to prevent a rebleed which is lethal in more than 50% of cases. Joppe Schneiders investigates the added value of hemodynamics for assessment of rupture risk in intracranial aneurysms. A state-of-the-art patient-specific Computation Fluid Dynamics (CFD method is used for this purpose.