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Mass-based ROC curves for classifiers designed using manual segmentation by R1 and computer segmentation initialized by R1 for the two cycles of cross validation: (a) Train in set T1 and test in set T2 and (b) train in set T2 and test in set T1. Also shown in (a) is the ROC curve derived from the LM ratings of R1. The difference in the Az values between pairs of ROC curves for each test set did not achieve statistical significance (p>0.05).
