Can a sharper beam of radiation shield the mind during brain tumor treatment?

This trial is testing whether proton therapy, a more precise form of radiation, can better preserve memory and thinking skills compared to standard photon radiation in people with slow-growing brain tumors (grade 2 or 3 gliomas). Participants will be randomly assigned to receive either proton or photon radiation, and their cognitive function will be tracked for several years. The goal is to see if the more targeted approach reduces damage to healthy brain tissue and helps maintain quality of life.