@mlabus3 I must defer to Jeff Marchi on this one - he always ‘knows a guy’ since he is plugged into a few organizations.
As for your radiation question, I had SRT of 25 sessions to the bed and nodes with no long term SE’s to date…that can always change.
But as a practical matter, you do have a more aggressive PCa and a wide area approach makes sense to me so that would involve a form of EBRT.
I do not know if an SBRT approach is really ideal - or if it can be tweaked- to accomplish SRT.
By definition it is a much higher dose and sensitive tissues (bladder esp) can be damaged.
My 25 sessions was a marked reduction from the standard 39; they might even be able to go with even less in the future if they run another study.
Proton vs Photon will probably be debated for the next couple of decades so I wouldn’t focus too much on that myself.
But if you are in a situation to get salvage therapy with proton beam radiation, and it seems better to you, well why not?
Outcome-wise, however, there’s no difference.
Phil