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Fig. 1B —Free-response receiver operating characteristic (FROC) curves
for external validation (diamonds) and previously reported internal
validation training (triangles) and testing data sets
(squares). Curves show the trade-off in sensitivity per adenomatous
polyp versus number of false-positive findings per patient as tunable
threshold is varied in computer-aided detection (CAD) software. Circles
indicate operating points used to determine sensitivities in
Table 1. Graph shows FROC
curves for adenomatous polyps 6–9 mm in diameter. Sensitivity of CAD in
external validation data set is greater than for both previously reported
internal validation data sets.
