MRI and PET Imaging in Predicting Treatment Response in Patients With Stage IB-IVA Cervical Cancer

Inclusion Criteria: * Patients must have histologically confirmed stage IB2-IVA epithelial carcinoma of the cervix, including squamous cell, adeno-, and undifferentiated carcinoma, and excluding small cell/neuroendocrine carcinoma, who will undergo radiation therapy for cervical cancer with curative intent * Surgical staging with retroperitoneal staging and lymphadenectomy is permitted * Patients who will undergo standard radiation therapy with concurrent cisplatin-based chemotherapy for cervical cancer * Patients with no prior radiation therapy to the pelvis * Patients with no contra-indications to magnetic resonance (MR) imaging * Patients must have adequate renal function: glomerular filtration rate (GFR) \> 30 mL/min/1.73 m\^2; for the test-retest sub-study MRI, patients must have a GFR of \> 60 mL/min/1.73m\^2 * Ability to understand and the willingness to sign a written informed consent document Exclusion Criteria: * Patients with small cell/neuroendocrine cervical carcinoma * Patients who have received any prior pelvic radiation therapy in the area of the tumor that precludes the delivery of a curative dose of pelvic radiation * Medical contraindication to MR imaging (e.g. pacemakers, metallic implants, aneurysm clips, known contrast allergy to gadolinium contrast, pregnancy, nursing mothers, weight greater than 350 pounds, GFR \< 30) * Major medical or psychiatric illness that, in the investigator's opinion, would prevent completion of treatment, completion of the study protocol, or interfere with follow-up * Life expectancy of less than 6 months