Figure 3. ROC curves show performance with clinical reading (dashed-dotted line; Az = 0.86), computerized analysis (dotted line; Az = 0.85), and combined model (solid line; Az = 0.91) in the set of 72 clinically and mammographically occult (52 benign, 20 malignant) lesions. TPF = true-positive fraction, FPF = false-positive fraction.