proton treatment

Search for "progression-free survival" rather than "cure".

I think the progression-free survival rates for protons are comparable to other treatments, although no large scale randomized trials have been done to compare. Loma Linda did a study in its early days and reported that at 5 years out, 89% of patients were alive and free from progression of their cancer.
http://www.ncbi.nlm.nih.gov/pubmed/10394406

Proponents of proton beam therapy emphasize a low rate of side effects for protons compared to photons (protons deliver their energy in a precise 3D location compared to photons, which do their damage all the way through) as a differentiating factor.

There's a major trial underway since 2009 addressing your question:
http://clinicaltrials.gov/ct2/show/NCT01045226

I looked into protons as a possible salvage therapy when my PSA came back after surgery. I ended up going with IMRT instead, mainly for logistical reasons. It would have been hard to relocate to the nearest proton beam site for the duration of treatments.

Thanks Galileo and Jarry_Delaware you have been great help. Now I will know where to look for Information.

Humana is likely not willing to pay for proton therapy for my prostate cancer. Is there any way to get them to pay? Anyonewho has an idea, I would like to at least explore this form of treatment.