Figure 5. Free-response ROC plots show sensitivity versus FP detections per patient (log scale) for radiologists and the cross-validation-trained CAD system among, A, noncalcified nodules with a diameter of 3 mm or more and, B, noncalcified nodules with a diameter of 5 mm or more. The legend in B applies also to A, but note the difference between A and B in the scaling of the y-axis.