CyberKnife® Radiosurgery is a form of radiation that was initially developed for brain, head and neck, and spine tumors, but it can be used for the process of fractionated stereotactic body radiation therapy in any other tumor type. For this non-invasive procedure, the patient is carefully held still while a robotic arm delivers the high-dose radiation beams to the area of the body being treated. At the same time the robotic arm is delivering the treatment, two X-ray/camera systems are monitoring the position of the tumor. The robotic arm can adjust throughout treatment to stay on target if the patient or tumor move slightly. Treatment can be completed in one session, or it can be broken into two to five shorter sessions.