Table 2 Distribution of false-negative and positive findings (FN/FP) depending on the assessment. Two of 374 cases were normal (BI-RADS 1). The relative and the absolute number of false-negative and false-positive findings for the individual assessments and for the total number of patients are shown.

	FNFirst diagnosis	FPFirst diagnosis	FNSecond diagnosis	FPSecond diagnosis
1 Asymmetries or architectural distortion on mammography and galactography images (2 cases). 2 Findings only visible on sonography.
Focal findings	4.5 %(11/245)	19 %(46/245)	0 %(0/245)	8.6 %(21/245)
Microcalcifications	6.4 %(5/78)	40 %(31/78)	1.3 %(1/78)	13 %(10/78)
Other1	9 %2/22	64 %14/22	0 %0/22	13.6 %3/22
Only sonography2	7.4 %2/27	33 %9/27	7.4 %2/27	14.8 %4/27
Total	5.4 %20/372	26.9 %100/372	0.8 %3/372	10.2 %38/372