What is Gamma Knife ? Gamma Knife is the main treatment method of stereotactic radiosurgery. It is based on the principle of stereotactic geometry to selectively determine the normal tissue or diseased tissue in the brain as the target, and use cobalt-60 to produce The gamma ray is focused and irradiated in a large dose at one time, so that it can produce focal necrosis or functional changes to achieve the purpose of treating the disease. Working principle： Gamma-ray head stereotactic radiosurgery system (referred to as head gamma knife) is a large-scale equipment that integrates stereotactic technology and radiosurgery technology, mainly for the treatment of craniocerebral diseases. The advantage of less damage. The equipment is expensive and requires high application technology. [2] Due to