The Gamma Knife and CyberKnife are stereotaxic (focused) radiation units. Both are available to the therapy of Inland Neurosurgery Institute (INI) patients. These non-surgical radiation units are helpful in the therapy of brain tumors, AVM’s (Arterio-Venous Malformations), Essential Tremor, Trigeminal Neuralgia, and spine tumors (CyberKnife only). Additional information can be obtained at the SACH Gamma Knife Center and Pasadena CyberKnife Center.