Proton radiation: I spent 2.5 months at Loma Linda Hospital near Riverside, California in 2010. As I understand, the cost of building a proton radiation system will exceed $200 million USD. Or, more. Hence, the reason why there are so few in the US. Initially, so I was told proton radiation was used for brain cancer in children. It was then used later for prostate cancer. I understand the time frame has changed.

In the mornings awaiting "my turn", several men in smocks would gather in the waiting room to be called. So, most of us had some conversations. Many of the patients were physicians. This validated my decision to select proton radiation over the other options. Make every effort to explore the options. Mayo or Cleveland Clinic would be two excellent choices.