Fig. 3
From: SWI as a promising tool comparable to CT perfusion in evaluation of acute cerebral infarction
a DWI shows no definite abnormality along the territory of MCA at both sides. b SWI of the same patient revealed asymmetrical vessel sign in the form prominent cortical veins (arrow head) on the left cerebral hemisphere along (M1-M6 segments) representing the area at risk with ASPECT score 4. c CT perfusion of the same patient revealed asymmetry in tissue perfusion between the left and right hemisphere with affected left cerebral hemisphere along (M1-M6 segments) (white arrow) as well as left lentiform nucleus (black arrow) representing the area at risk with aspect score 3