Fig. 1.

a CT angiography of the brain showed an occlusion in the distal part of the left M1 segment of the middle cerebral artery (arrow). b CT perfusion of the brain demonstrated increased mean transit time in the middle cerebral artery territory on the left side (blue area) as compared to the right side. c CT of the brain without intravenous contrast displayed infarction of the basal ganglia on the left side with decreased attenuation of the caudate (upper arrow) and lentiform nucleus (lower arrow).