Patients will be approached for study participation at the time of their initial radiation oncology consultation in the outpatient department of the Cross Cancer Institute (CCI). Patients who wish to participate, and satisfy the eligibility and exclusion criteria, will be required to review and sign the consent form at that time. Patients will then undergo regular staging investigations, construction of an immobilizing shell, treatment planning MRI, and CT simulation. These studies are typically completed 2 weeks after the initial consult. Radiotherapy will commence approximately 3-4 weeks after the initial consult. At week 0 of RT, prior to beginning therapy, the patient will undergo the baseline MRS. The mid-RT MRS study will be performed during week 4 of RT. The post therapy scan will take place 2 months post-therapy. From then on, patients will be seen in clinic every 2-4 months for follow-up, and will undergo MRI and MRS scans with each visit for 1 year.