Yes. HDR Brachytherapy fit the bill for me.
I wanted a treatment that would attack the cancer without extending beyond the prostate. Proton therapy seemed like it fit the bill and it did. I will update the forum when I have my first post-radiation review this month.

I had thought HDR Brachytherapy also fit the bill. But I heard that that it wasn’t done much and none of my doctors mentioned it. But later in following up, I came to the conclusion that it might be a better choice. It covers the entire prostate and the radiation is from the inside out. By that time I was already scheduled for Proton at Mayo and decided against delaying any further. My side effects after treatment were minor. But yes, I think I might have chosen Brachy under other circumstances.