 3. To have an Automated Breast Ultrasound ABUS, if the screening mammogram indicates dense breast tissue. ABUS will require the patient to lay comfortably on her back for approximately 10 minutes while the ultrasound is being performed. The study includes as many as three ultrasound scans of each breast, each scan lasting one minute. Unlike a mammogram, ABUS does not involve any mammography-like compression. Instead, the breast will be lightly pressed against the patients body during the scan. If the mammogram shows that the breast tissue is not dense, the volunteer will not be eligible for further participation in the study and will not undergo an ABUS. The participant will still receive the same standard care and treatment she would normally receive. 