FIG 3. Images from the case of patient 5, a 75-year-old woman.

A, Three sections of isotropic trace diffusion images (5900/159/2) show abnormal hyperintensities limited to the left corona radiata and deep frontal white matter.

B, Three time-to-peak perfusion maps (2199/82/35), obtained immediately after the diffusion images and at the same section positions, show marked hypoperfusion in the territory of the posterior division of the left middle cerebral artery.

C, Angiographic frames obtained before (left) and after (right) the intraarterial administration of thrombolytic therapy. Note the wedge of absent posterior vessels (to the right of the left image) compared with the addition of three large branches after therapy (white arrows).

D, Isotropic trace diffusion images, obtained at the 24-hour follow-up examination, reveal only scattered subcortical white matter hyperintensities (thin white arrows), without evidence for cortical infarct.

E, Follow-up perfusion maps obtained at the same levels show normal symmetrical time-to-peak effects