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Fig. 5 —66-year-old man (patient 36) with focal perfusion abnormality
at superior cortex. Focal perfusion abnormality is found at left precentral
and postcentral gyri (arrow), which was missed on 20-mm-coverage
perfusion CT. Follow-up MR angiography (MRA) and diffusion-weighted imaging
(DWI) show focal stenosis only at right middle cerebral artery bifurcation,
but acute infarction at left superior cortex (arrows). CBV = cerebral
blood volume, CBF = cerebral blood flow, MTT = mean transit time, and TTP =
time to peak.
