Figure 1From: Relatively higher norms of blood flow velocity of major intracranial arteries in North-West IranPeak systolic flow velocity in different cerebral vessels compared for three age groups. MCA: Middle cerebral artery, PCA: Posterior cerebral artery, ACA: Anterior cerebral artery, VA: Vertebral artey, BA: Basilar artey, PV: Peak systolic velocity, R; Right, L: LeftBack to article page