This pilot clinical trial studies copper Cu 64-DOTA-B-Fab positron emission tomography (PET)/computed tomography (CT) in imaging patients with ovarian and breast cancer. Cancer antigen (CA)6 is an antigen (substance) found on the surface of several types of cancer cells such as cancer of the ovary and breast. Diagnostic procedures, such as copper Cu 64-DOTA-B-Fab PET/CT, may help identify CA6 positive tumors and allow doctors to plan better treatment.