My oncologist gave me the Prostate Cancer Foundation brochure to read after my biopsy came back positive and before we had our first face to face to discuss treatment. Prior to the visit I had read a lot online and also a book describing the various treatment modalities. To say I was somewhat surprised the Prostate Cancer Foundation labelled Proton Beam Therapy as experimental, especially when other sources rated its ability to kill the tumor as effective as photon radiation without the attendant side effects. I chose Proton Beam Therapy because I did not want to undergo surgery and from what I have read, the side effects short term are minimal compared to photon radiation. My treatment was completed in November 2022 so not enough time has passed in my case so that I can make a definite statement on effectiveness of the PBT, only time will tell.