 Breast cancer is one of the most commonly diagnosed cancers in American women with an estimated 210,000 new cases diagnosed in 2007. Death rates in women with breast cancer are much lower when the cancer is detected at an early stage, and less intense forms of treatment can be used at early stages when cancerous lesions are the smallest. It is for this reason that annual routine mammograms are recommended by the American Cancer Society for women 40 years of age and older and are the current standard of care for breast cancer screening. 