摘要：

Receiver Operating Characteristic analysis is now generally recognized as the most appropriate methodology for evaluating the diagnostic performance of medical imaging procedures (1–7). ROC analysis has been used in the field of psychophysics for three decades, and its theory and experimental methodology have been developed in considerable detail (8–13). Perhaps surprisingly, the statistical properties of ROC measures had received relatively little attention until several years ago, when the limited size of practical data sets in medical applications indicated the need for careful study of this issue. Recent progress in the statistical analysis of ROC data includes the work of Metz and Kronman (14,15), who developed a bivariate test for the statistical significance of differences between ROC curves measured from independent data sets; the work of Hanley and McNeil, who studied the statistical properties of the area under an ROC curve and developed techniques to predict the number of cases required tc demonstrate the significance of differences between ROC "Area Indexes" measured from either independent (16) or correlated (17) data sets; and the work of Swets and Pickett (7), who identified three components of variation in ROC measures and outlined a general statistical protocol for testing the significance of differences in the Area Index.

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