Correlation between fractional flow and magnetic resonance perfusion in patients with intracranial artery stenosis in the anterior circulation

There is a correlation between MRI perfusion and FF in patients with anterior circulation ICAS. A low FF may indicate a higher time to maximum tissue residue function and a poorer hypoperfusion stage. FF provides hemodynamic information that is distinct from and complementary to the anatomical assessment of DS. The ability to compute FF intraoperatively could, in the future, provide real-time feedback on physiological improvement following revascularization.