I asked about IMPT when I had my recurrence. I got the same answer from a few different doctors. They said that the IMPT beam is very precise, probably too precise for head and neck cancers. Unless the cancer is very well defined and tight, the beam will not hit all the cancer cells around the edges as IMRT does. It does well with childhood cancers in certain places because those tumors tend to have very well defined edges and are typically very tight whereas Head and Neck cancers tend to be a bit more diffused at the edges.

Although there were a few trials out there at the time, no one I was dealing with felt it was a good idea to go off the farm that far when they had so much more experience with current radiation treatments.

My two cents.