Hi @gently ,
Thanks for the info on CAProton. Dr. Rossi's experience is very impressive! I will definitely try to learn more about them and consider treatment there. (I love San Diego. Have friends there and was stationed there MANY years ago while in the US Navy, when San Diego was a far smaller place. Love La Jolla, great beach memories.)

After reading the article, "Consensus Statement on Proton Therapy for Prostate Cancer" from 2021, I have a much better understanding of the movement issues during therapy. I had been thinking of the whole patient moving, but it is more the prostate moving due to things like the bladder filling, peristalsis, gas in the rectum, and the rectum filling with stool.
See the section "Technical Delivery of Proton Therapy". I don't have permission to post the link as a new member of this forum. It was published in "International Journal of Particle Therapy" and can be found through sciencedirect.com and nih.gov.

Kudos to you for pursuing your choice of proton therapy when doctors were advising against it. That takes strength and determination! Along those lines, I received an interesting
response to my initial post from @5galloncan who indicated that in conversation with many fellow patients undergoing proton therapy at UFHPTI they all indicated "no urologists or doctors outside the proton community recommended or mentioned proton treatment to them".

My RO at Mayo Rochester is Dr. Ryan M. Phillips, MD, PhD. His PhD is in pharmacology. Nowhere near the experience of Dr. Rossi I would say, by the way. He's been at Mayo for about 3 years, I estimate, after being chief resident at Johns Hopkins School of Medicine.

Good luck to you, and thanks again for sharing your experience and knowledge!