Table 5.

False Positive Radiologist Findings According to Whether the CAD Marks were Intentionally Spatially Co-located on Supine and Prone Scans

Reader	Non-Matched FPs	Matched FPs
1	12	1
2	28	0
3	14	0
4	10	1
Average	64/1788* 3.6%	2/72 2.8%

Data are numbers (%) of false positive radiologist diagnoses according to whether the false positive was intentionally matched by the experimenters with a false positive in the same approximate location of the colon on the other scan. Multiple counts for some of the same false positives for readers and readings were included. The 72 matched false positives consist of a pair of false positives in each of 9 normal patients interpreted by each of four readers.

^*Includes 16 false positives (4 for each reader) on the same object, believed to be an inverted diverticulum that was very polyp-like in appearance; and 12 false positives on the same 6 mm hyperplastic polyp.