MCA infarct with CT perfusion


Initial non contrast CT demonstrates no definite abnormality, although in retrospect there is subtle blurring of the grey-white matter junction and slight swelling. 

A CTA and CT perfusion performed at the same time demonstrates a large region of avascularity involving the superior division of the right MCA territory with matching perfusion defect. 

Followup CT performed three days later confirms an established infarct in the same distribution.