Late to the conversation here, but for members in the future who have the opportunity to visit UTSW in Dallas and interview them as an option, they have a GammaPod machine, which targets the partial breast, not entire. You have to meet certain criteria after a lumpectomy (I don’t know them all, but margins, proportions of tissue removed to remaining tissue are a couple- determined in scan). The big upside is only 5 treatments - long days (you are there for about 4 hours and are hooked to a very awkward contraption, have to be able to lay face down on the table for each session, etc.
Fatigue was still a big factor for me at the end and after. If anyone is considering and in the Dallas area, I would recommend an opinion from them.
(For context, I was DCIS stage 0, and required 2 lumpectomies to remove tissue to clear the margins, ER+)