Yes, I have done a number of postings about Proton Radiation. Here is what i know.
Radiation send a beam into your body. That beam emits radiation all along the length of the beam with the strongest dose at the end of the beam. Unfortunatly the radiation beam touches tissue all along that beam that can couse a number of effects including tissue damage.
Proton sends a beam but only emits radiation at the end inside the tumor so all the tissue along the way is not radiated. This is in part why formerly treated areas can still take Proton radiation but not conventional Radiation.
Its new, its expensive and only available in a few locations in the uSA but from what I am reading has been very successful in clinical trials that are still on going.
Let us know what happens and what you learn tomorrow and good luck.