Fig. 4.

Regression plots for perfusion parameters and cell survival. a Immediate retention of cells, measured by [¹⁸F]-FDG-labeling, was not significantly correlated with infarct size, although there was a nonsignifcant trend towards inverse correlation. b 24-h engraftment of cells, measured by reporter gene imaging, showed a significant positive correlation with perfusion defect size. Cell engraftment was measured as relative signal intensity when compared to group average and normalized to cell number. c, d Lack of significant correlation of early cell retention and 24-h engraftment with the residual perfusion at the cell injection site as a measure of injection location relative to infarct center. ID injected dose, LV left ventricle