(a) A single photon emission computed tomography using 123I-N-isopropyl-p-iodoamphetamine (123I-IMP SPECT) perfusion scans on day 98. Compared with a standard normal database in perfusion findings, the Z-scores (SD) were calculated for each region and a regional Z-score of >2.0 was considered significant and indicated in green to red (compatible with the side color bar). The decreased perfusion was mainly observed in the left posterior middle frontal gyrus (pointed by red circles and arrows). (b) A following SPECT 3 years after stroke onset. The previous hypoperfusion showed an attenuation in both the area and degree on the left side view of this study.