This document discusses radiosurgery techniques for treating brain tumors, focusing on Gamma Knife and CyberKnife. It indicates that 132 total tumors were treated, with around 20 being malignant glial tumors. Radiosurgery involves delivering a high dose of radiation in a single fraction for curative intent. CyberKnife has advantages over Gamma Knife like not requiring a rigid head frame and allowing for treatment of larger and extracranial lesions through motion tracking and fractionation. Radiosurgery shows promise as a non-invasive brain tumor treatment option.