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FROC curves for automatic computer detection after feature classification with LDA. After prescreening, the system achieved 84.4% sensitivity with 4.3 FPs/case for the training set, and 84.9% sensitivity with 5.4 FPs/case for the test set. After LDA classification, at 1.7 FPs/case, the sensitivities were 77.8% and 75.5% for the training and test sets, respectively.
