Radiosurgery was invented some 30 years ago by Dr. Leksell. The concept was simple; he focused X-ray beams onto a deep seated brain tumor, and destroyed it. The focusing intensified the effectiveness of the X-rays. This led to the development of the Gamma Knife, and subsequently, the X-Knife. Both the Gamma Knife and the X-Knife provided valuable radiosurgery information to the medical world.

The rapid development of computer tracking technology in recent years has led to the invention of CyberKnife, which, although still based on the same radiosurgery concept, has set the patient free from the unpleasant screwed-down-head-frame required by both Gamma Knife and X-knife.