Diagnostic performance and inter-observer concordance in lesion detection with the automated breast volume scanner (ABVS)

Table 6 Estimation of the performance of the ABVS in a scenario, where second-reading of the data is performed

	At least one examiners judges ABVS as normal (negative)	Both examiners concordantly suspicious ABVS (positive)	Total
Benign cases (conventional ultrasound negative)	64^a	18^b	82
Malignant cases (conventional ultrasound positive)	3^b	15^a	18
Total	67	33	100

Sensitivity, specificity and accuracy calculate to 83.3%, 78.0% and 79.0%, respectively. For the evaluation of the second-reading the following rules were applied: If both examiners agreed that a scan was suspicious, the evaluation was considered “positive”. If both examiners agreed that a scan was unsuspicious or disagreed and only one examiner regarded the scan as unsuspicious, the evaluation was considered “negative”.
^a“true” evaluation.
^b“false” evaluation.

ISSN: 1471-2342