with protons you potentially can have the dose go into the brain to a certain depth and not exit out the other way like an X-ray would x-rays are like light it goes right through you you may have a decreasing dose but it's kind of like a bullet you got an exit wound going out with proton therapy this is one of the areas where protons shine because you can actually modulate what's called the brag peak of the physics of the protons to where it'll go at certain depth and not go out the other way so down the road hopefully we'll start to see improved survival so far it really hasn't shown to be a huge improvement but there's less less integral dose to the rest of the brain