Dynamic Contrast Enhanced MRI (DCE-MRI) Diffusion Weighted MRI (DW-MRI) and Magnetic Resonance Spectroscopy (MRS) of Head and Neck Tumors

Pts undergo DCE-MRI, DW-MRI or 1\^H-MRS studies on either the 1.5T scanner or the 3T MRI scanners. Patients will be grouped based on their treatment: group one will include pts who undergo surgery (we will no longer accrue pts in this group) \& group two will include pts who undergo chemoradiation therapy.Pts who undergo surgery will have pretreatment DCE-MRI, DW-MRI \&/or 1H-MRS studies on the GE 1.5T or 3T MRI scanner. Pts who participate in chemo-radiation therapy protocols will have pretreatment DCE-MRI, DW-MRI \&/or 1H-MRS studies on the 3T Philips MRI scanner in the radiation oncology suite \& will undergo additional recommended weekly DW-MRI including IVIM studies at the same MRI scanner during the course of treatment. Pts will undergo two recommended DCE-MRI studies (unless contraindicated) when possible. 1st intra-treatment DCE-MRI is recommended between the 1st \& 2nd weeks of treatment \& the 2nd intra-treatment DCE-MRI is recommended between the 3rd \& 4th weeks of treatment.