Fig. 4
a Representative cerebral blood flow (CBF) map and corresponding T2 map at 28 days post-middle cerebral arterial occlusion (MCAO). The region encircled by the green line is the region of interest (ROI), defined as a T2 abnormal area on the corresponding T2 map. b The CBF value of ROI was quantified. Values were normalized to a homologous region in the contralesional brain. c The percentage of pixels (with normal CBF, hyperperfusion, and hypoperfusion) on ROI was calculated. The thresholds for abnormal perfusion were defined as the mean CBF value of the contralateral hemisphere ± 2 standard deviations (n = 6 per group, mean ± SEM). *P < 0.05, versus the PBS vehicle; ## P < 0.01, versus normal perfusion of the same group. hUCB human umbilical cord blood, MNC mononuclear cell