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Figure 4 Linear correlation of (A) coronary flow reserve (CFR) and myocardial perfusion reserve (MPR) and (B) endomyocardial/epimyocardial perfusion ratios (Endo/Epi ratios) and CFR in transplant patients. Values in the right lower quadrant represent false positive for transplant arteriopathy (Tx-CHD) as determined by the MPR (A) or Endo/Epi ratios (B); values in the left upper quadrant represents false-negative for Tx-CHD as determined by the MPR (A) or Endo/Epi ratio (B). Cutoff values (dotted lines) for MPR (A) and Endo/Epi (B) ratios as determined by receiver operating characteristic analysis (see text for details). Circles = group A; squares = group B; triangles = group C of the transplant patients.
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