Fludeoxyglucose F 18 PET Scan, CT Scan, and Ferumoxtran-10 MRI Scan Before Chemotherapy and Radiation Therapy in Finding Lymph Node Metastasis in Patients With Locally Advanced Cervical Cancer or High-Risk Endometrial Cancer

This phase I/II trial is studying how well fludeoxyglucose F 18 PET scan, CT scan, and ferumoxtran-10 MRI scan finds lymph node metastasis before undergoing chemotherapy and radiation therapy in patients with locally advanced cervical cancer or high-risk endometrial cancer.