Figure 3b. (a–d) ROC curves for the four readers based on the BI-RADS categories assigned to the lesions by each reader. On each graph, the dashed line represents the ROC curve generated from the initial interpretations, which were based on the morphologic features and time–signal intensity curves of the lesions, and the solid line represents the ROC curve generated from the second interpretations, which were based on the morphologic features, time–signal intensity curves, and tCho concentrations of the lesions. Note that the accuracy (expressed as area under ROC curve) of the interpretations made by also assessing tCho measurements (solid lines) is higher than the accuracy of the interpretations made without assessing tCho measurements (dashed lines).