Pim van Ooij1, 2, Joppe Schneiders1, Henk A. Marquering1, 2, Charles B. Majoie1, Ed vanBavel2, Aart J. Nederveen1
1Radiology, Academic Medical Center, Amsterdam, Netherlands; 2Biomedical Engineering & Physics, Academic Medical Center, Amsterdam, Netherlands
4D phase contrast MRI measurements (4D PC-MRI) in intracranial aneurysms are presented and compared with patient-specific computational fluid dynamics in which a 4D velocity profile as measured with through-plane PC-MRI (2D PC-MRI) is prescribed as inflow boundary conditions. Quantitative and qualitative similarities were found. Although the inflow velocity assumption in CFD is minimized by using the 2D PC-MRI measurement, other assumptions cause deviations from measured flow patterns. However, in CFD the resolution is higher and results show more flow details. Thus, for hemodynamic assessment, CFD and 4D PC-MRI complement each other.