Figure 1: 18F-FDG PET imaging of cardiac viability.

(a) Representative polar map of the PET images obtained from pigs treated with PBS versus MSCs at week 1 and week 4. (b,c) Myocardial metabolism evaluation by measuring the left ventricular segmental average signal intensity (mean signal intensity, MSI) at Control group (b) and MSCs group (c). *MSI increased significantly, P < 0.05; #MSI increment value was significantly higher in the MSCs group than in the control group, P < 0.05.