Physicians use Gamma Knife radiosurgery as a non-surgical method to target specific areas of the brain. Rather than performing invasive surgery to remove a tumor or lesion by opening the skull, this treatment employs precise gamma irradiation beams to treat the affected area externally, making it non-invasive.

Gamma Knife employs 192 beams of gamma irradiation to precisely target the tumor or lesion without using a knife. The beams meet at a single point with extreme accuracy, less than one-tenth of a millimeter, minimizing exposure to healthy tissue. This non-invasive treatment may result in a shorter recovery time than traditional surgery. It can target the smallest and most difficult brain tumors or lesions while preserving healthy tissue and organs. Stereotactic radiosurgery, also known as Gamma Knife radiosurgery, can be an alternative to whole brain radiation therapy for multiple brain metastases.