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Fig. 7A —Examples of false-positive lesions by computer-aided
detection (CAD). Axial and corresponding 3D endoluminal (lower
corner) CT colonographic images of false-positive findings by
computer-aided detection (CAD). Feces (arrow, A) and prominent
or converging folds (arrow, B) tend to be major causes of
false-positive findings, followed by residual fluid (arrow,
C), ileocecal valve (arrow, D), and rectal tube
(arrow, E). These lesions appear as blobs and were thus
incorrectly identified by CAD as polyp. Various false-positive lesions are
colored red, which indicates false-positive findings by CAD.
