Use of Molecular Breast Imaging (MBI) to Detect Additional Disease in Women With Breast Cancer Who Are About to go to Surgery

Conventional mammography is not a reliable method for determining the extent of disease in women with breast cancer. Molecular Breast Imaging (MBI) is a new nuclear medicine technique that allows the breast to be imaged in a manner similar to mammography, but without the pain of compression. Initial results with this method have shown it is very good at detecting small breast cancers (\~1/4 inch). The purpose of this study is to see if MBI is a better method than mammography in determining how much cancer is present before a woman goes to surgery. The study will comprise 120 women with breast cancer who are going to surgery. The investigators hope that this study will demonstrate that MBI will be more accurate in determining how much cancer is present.