If you have been diagnosed with breast cancer, your physician may recommend a breast MRI to understand the following: • The size of the cancer and whether it is spreading to surrounding tissue • If there are other cancers present in the same breast or in the opposite breast • Assess the lymph nodes to determine if the cancer has spread in that area • If a mammogram or ultrasound shows an unclear result, a breast MRI can provide a much clearer picture and determine if further studies are needed.