hello,
I am currently undergoing IMRT for a benign optic nerve sheath meningioma.
I do not pretend to have ANY expertise, but, I can tell you that I thought that I was going to be offered PROTON and was worrying over making a decision as to where to get treatment based on that, but I was wrong. Both radiation oncologists, two different institutions and both recommended IMRT.

But each case is different.

However, lots of caveats.....I have a small tumor in a very difficult location.....

I would recommend watching this video, which I watched a while back, as this doctor explains a lot in a very clear manner......it's about a half hour long and he is very easy to listen to in my opinion.....five years old, but I think what he says probably still has value....if you watch it, let me know what you think....

https://www.youtube.com/watch?v=44ei2vMBFTE Dr. Michael B. Sisti

near the end, he makes some comments about how each doctor has their own ideas.....I cannot quote him, but it made sense at the time.....I wish you luck. I have had eleven sessions out of twenty-eight so far. Take care.