FIGURE 5.  PET-based infarct sizing using automated delineation with varying threshold values. Infarct size is defined as the proportion of MCA of infarcted myocardium, derived by PET and automated delineation, in relation to histomorphometry. Dependency of correlation coefficient (A), slope (B), and y-intercept (C) of linear regression line, as well as mean of wrongly assumed infarct proportion preoperatively (D), on choice of threshold in PET analysis. All data are given for 3D contour calculation (MCA_3D, open bars) as well as for stacked slices' calculation adapted to histomorphometry (MCA_slices, solid bars).