The Prone to Supine Breast MRI Trial

The purpose of this study is to find out whether additional MRI images taken with patients in a different position after completing a standard MRI are of sufficient quality to allow a radiologist to identify the edges of the tumor. These additional MRI images will only take about 10-15 minutes to obtain and will not require a second injection of contrast material.The information gathered in this study will make it more feasible to use a new device called the "breast cancer locator" to help surgeons more accurately remove breast cancers.