To assess the benefit of stereoscopic digital mammography in daily practice.

Stereoscopic digital (SD) mammography allows a fused 3D view of mammogram. A 4-degree cranio-caudal (CC) angle view matched with a regular CC view allows generating a stereoscopic view Three breast radiologists reviewed retrospectively 1,110 stereoscopic digital mammograms (1075 women) performed between November 2011 and February 2013 with the following sequence: each evaluated firstly conventional mammogram alone, and then integrated SD mammograms. The benefit was quoted in 3-grade scale: 0 for no benefit, 1 moderate and 2 excellent. The concordance between radiologists was evaluated by the W Randall coefficient. Subgroup analysis according to the BI-RADS classification, breast density and type of abnormalities were performed by calculating Odds-ratio.

The readers had the same opinion regarding the value of stereoscopic digital mammograms in 87% of cases (962/1,110). Benefit was null, moderate and excellent in 8%, 52% and 26% respectively. The concordance of radiologists was excellent with a W coefficient above 0.89.

SD mammogram improved interpretation of abnormal mammograms. This potentially interesting and promising complementary tool might be beneficial in daily breast imaging practice.