Fig 1. A 75-year-old man, within 2 hours of right-sided stroke and presentation of NIHSS 20. A, NCCT demonstrates subtle loss of the left posterior putamen, internal capsule, and posterior insular cortex (white arrowhead) (ASPECTS 7). B, Cerebral blood flow. C, Cerebral blood volume. D, Mean transit time. Cerebral blood volume demonstrates an abnormality confined to the posterior putamen and internal capsule (ASPECTS 8), with larger cerebral blood flow and mean-transit-time abnormalities corresponding to the left middle cerebral artery M1 segment occlusion (not shown). E, Follow-up NCCT at day 6 shows an indistinct posterior putamen confirmed on diffusion-weighted MR imaging (F). The patient recovered by 18 points with a final NIHSS of 2.