Investigation of the Role of Functional Imaging in Characterising Radiotherapy Target Volumes and Assessing Disease Response in Patients Undergoing Chemoradiation for Head and Neck Cancer (HNC)

Adult patients who have a head and neck cancer and are planned to receive chemotherapy and radiotherapy will be invited to participate in the study. Patients who are not in very good health, have diabetes or kidney failure will not be considered for the study. Also patients who can not undergo MRI scan or are allergic to contrast injection given prior to the scan or have had any other form of cancer (except skin cancer) will also be excluded from the study.