Women who consent for the study will be escorted by the research coordinator to a dressing room, where the subject will change into a gown. The research coordinator or research technologist will then escort the participant to the dedicated study room for the imaging exam. The patient will have the SDBT study performed in a similar manner as conventional mammography in the mediolateral oblique and cranio-caudal plane. The participant will stand up and the mammography research technologist, ensuring patient comfort, will assist in positioning their breast in the breast tomosynthesis unit with standard compression. Once positioned, the total scan time is approximately 10 seconds. Both the left and right breast will be imaged. The length of time for the positioning and examination of a subject's breast may vary but it is expected that the entire imaging procedure will take about 5-10 min, including positioning time.