A Comparison of the 15 and 30 Acquisition Angle Breast Tomosynthesis Mammography for Breast Abnormalities

Inclusion Criteria: * Subject is female of any race and ethnicity * Subject is at least 40 years old * The screening and diagnostic mammograms were performed at the recruiting institution on a Hologic Selenia System * Subject is categorized as BI-RADS 0 because if mass, density, or calcifications detected on the basis of screening or diagnostic mammography * Subject will undergo study imaging within 30 days of standard of care imaging Exclusion Criteria: * Patients who are pregnant or think they may be pregnant * Patients who are breast feeding * Subjects unable or unwilling to undergo informed consent * Subjects with breast implants