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Figure 1 Scatter Plots of FFR Versus QCA, QCT, CCA, and CTCA

Quantitative coronary angiography (QCA), quantitative computed tomography coronary angiography (QCT), CCA, and CTCA are plotted versus FFR. There was a weak, but significant, negative correlation between QCA and FFR (r = –0.30) and between QCT and FFR (r = –0.32). Coronary arteries smaller than 3.5 mm are depicted as solid circles, coronary arteries larger than 3.5 mm as open circles. Abbreviations as in Figure 1.