FIG 1. A, T2-weighted (top), diffusion-weighted (middle), and perfusion-weighted (TTP) (bottom) images obtained 2.5 hours after onset of symptoms. T2 and diffusion findings are negative, but profound perfusion abnormality (hyperintensity) of the right hemisphere is shown.

B, 3-day follow-up T2-weighted (top), diffusion-weighted (middle), and perfusion-weighted (bottom) images (rCBV, max R2*, and TTP) show large right anterior and middle cerebral artery infarctions.

(Courtesy of Michael E. Moseley, Stanford University.)