Fig. 4.

ROC curves for the four readers using LOR-LOP-CV. Model built from single-phase features combined with venous–arterial delta phase features. (a)–(d) Curves for readers 1, 2, 3, and 4, respectively. Also shown AUC and standard error (SE) for each ROC curve ($\mathrm{CI}=\mathrm{AUC}\pm 1.96\times \mathrm{SE}$).