Patients will be treated according to the current department protocol. This study is only an imaging / treatment planning study. No changes in treatment will be made based on the obtained imaging data set. The risk for the patients will be negligible. From the MV-CT approximately 1 cGy. The MRI will be performed without contrast (so no dynamic gadolinium enhanced MRI to evaluate perfusion distribution) to limit the patient burden and risk. Regarding the total irradiation dose of 7200 till 8200 cGy to the patient this additional risk is negligible. The current waiting time for the patient to start with radiotherapy is approximately 5 to 6 weeks. In this waiting time the imaging studies will be performed, so participation to the study will not result in any treatment delay for the patient. The MV-CT scan will take approximately 30 minutes to perform and the combined MRI/MRS approximately 1 hour.