Table 4. Detection performance of the models and radiologists in the external test.

	T1 + CE	T1	CE	Radiologists*
Per-lesion sensitivity	0.857 (0.805–0.909)	0.771 (0.709–0.834)	0.714 (0.647–0.781)	0.746 (0.543–0.960)
Per-lesion positive predictive value	0.794 (0.766–0.821)	0.708 (0.678–0.739)	0.409 (0.388–0.429)	0.701 (0.511–0.882)
Average number of FP per series	0.384 (0.328–0.439)	0.797 (0.715–0.879)	2.263 (2.114–2.412)	1.338 (-0.071–2.833)

The data in parentheses are 95% confidence intervals.

^*Data are the average values of five radiologists.

T1 = non-contrast T1-weighted image, CE = contrast-enhanced fat-suppressed T1-weighted image, FP = false positive