With conventional digital mammography, the radiologist is viewing the tissues of your breast overlapping on flat images. This tissue overlap can sometimes make cancers hard to detect. Also, overlap can sometimes create areas that appear abnormal, but require that you be “called back” for additional tests to determine that cancer is not present (so-called false positives). Tomosynthesis or “3D” mammography directly addresses the current limitations of standard 2D mammography. Multiple studies have shown that “3D” mammography increases the detection of breast cancer by approximately 25%, and decreases the number of false positive call backs by approximately 15%.