Table 2.

Estimation of the statistical significance of the difference between the test FROC curve of the four-view approach and the FROC curve of each of the other three approaches: Single-view, two-view, and bilateral analyses. The pair of the view-based FROC curves for each test subset was compared using the JAFROC analysis. The p value of each pair and the FOMs of the FROC curves are shown for all masses and the malignant masses.

JAFROC analysis	FOM
	All masses		Malignant masses
	Test subset 1	Test subset 2	Test subset 1	Test subset 2
(1) Single-view	0.67	0.67	0.68	0.69
(2) Two-view	0.72	0.71	0.73	0.73
(3) Bilateral	0.71	0.72	0.73	0.74
(4) Four-view	0.77	0.77	0.80	0.81
P value: (1) vs (4)	<0.0001	<0.0001	<0.0001	<0.0001
P value: (2) vs (4)	0.001	0.0004	<0.0001	<0.0001
P value: (3) vs (4)	0.0004	0.001	<0.0001	<0.0001