Cyberknife Stereotactic Radiosurgery Machine. This device delivers highly focused radiation beams from a large number of unique angles, with continuous automated X-ray target localization throughout the entire treatment, creating a highly potent and conformal high dose target volume with very rapid fall-off of dose outside the target volume. This device may be used for Stereotactic Radiosurgery (SRS) (e.g. - brain lesions) or Stereotactic Body Radiotherapy (SBRT) (e.g. - prostate lesions).