 This study will try to determine if ABUS can be a clinically beneficial element of routine breast screening in women who do not have any known abnormalities or symptoms, but do have dense breast tissue which could impact the accuracy of their yearly mammograms. Unlike mammography, ABUS does not use radiation. ABUS uses sound waves at a safe frequency to create pictures of the internal breast tissue. Ultrasound has been shown to find cancer not visible with mammography in women with dense breasts. The ABUS used in this study automatically scans the breast and may help detect cancers in dense tissue. 