waymen, thanks for information. I am 77 and plan to be around a lot of years. I too chose to limit the possibility of future issues that photon would have. Mayo Jacksonville does use a new photon machine but the photon radiation still does pass through body.

I was reading that research is showing that the high dose radiation treatments (5) are having more secondary side affects issues than the long dose (20-30). UFPTI where I had my proton done received a 25 million dollar federal grant to do long term research on proton and photo secondary cancer and long term side affects. Right now all research has been 5 year.