RecruitingProcedureDynamic Contrast-Enhanced Magnetic Resonance Imaging in Diagnosing Osteoradionecrosis in Patients With Head and Neck Cancer That Is Primary, Has Come Back, or Has Spread to Other Places in the BodyThis trial studies how well dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) works in diagnosing osteoradionecrosis in patients with head and neck cancer that is primary, has come back, or has spread to other places in the body who are undergoing radiation therapy. DCE-MRI may help doctors to predict osteoradionecrosis in patient with head and neck cancer undergoing radiation therapy.