Study Purpose: This research is looking at a special type of MRI called diffusion MRI (dMRI) to see if it can help understand how head and neck cancer responds to treatment. MRI stands for Magnetic Resonance Imaging, which is a way to take pictures of the inside of the body.

• Study Length: The study will include a few MRI scans over time.
• Eligibility: Participants must be 18 or older and have not started treatment for head and neck cancer yet. They should not have certain medical devices, implants, or a history of seizures.
• Visits: Participants will need to visit the study site for MRI scans. The exact number of visits will be discussed with you.

This study does not use any injections like a contrast agent for the MRI. The study will measure how water moves in cancer cells to help us understand how the cancer is changing. This could help doctors choose the best treatment plan in the future. If you are interested, please talk to the study team to learn more!