Gamma Knife (Gamma Knife) is the main treatment method of stereotactic radiosurgery (Stereotactic Radiosurgery). It is based on the principle of stereometrical orientation to selectively determine the normal or diseased tissues of the skull as the target, using cobalt -60 The gamma rays produced are irradiated in large doses at one time to cause focal necrosis or functional changes to achieve the purpose of treating diseases.
Gamma-ray head stereotactic radiosurgery treatment system (referred to as head gamma knife) is a large-scale equipment that combines stereotactic technology and radiosurgery technology to treat brain diseases. It has no craniotomy and damage. The advantages of small. The equipment is expensive and requires high application technology. [2]
Due to the particularity of the distribution of radiation in the target area, the surrounding tissues are almost unaffected, and the necrotic edge of the target area is like a knife cut, so the image is called "gamma knife". The treatment principle of gamma knife is similar to the focusing process of magnifying glass. Place the magnifying glass in the sun, and a dazzling light spot, the focal point, will be formed under the magnifying glass. Outside the focus, people feel as usual, but there is a high heat at the focus, enough to ignite some objects. Of course, if you want to focus in the human body, it is impossible to use solar rays. Instead, you must use penetrating high-energy rays, such as gamma rays. At the same time, it is not as simple as magnifying glass focusing. A series of modern technologies such as nuclear physics, computers, biological radiation, and electromechanical can be realized. [1]
Therefore, Gamma Knife is a product of modern high technology at the end of the 20th century. As a brand-new non-invasive treatment method, it is a revolutionary breakthrough in the history of medical treatment. Since the radiation beam passes through the normal tissue from all directions, the irradiation dose of the normal tissue is very scattered, and the normal tissue per unit volume is only instantaneously irradiated, so the normal tissue is protected, and the normal tissue outside the target is only subjected to uniform, Weak dose irradiation. As long as the focus is on the lesion, you can destroy the lesion at one time accurately like a scalpel, achieving a magical effect of no trauma, no bleeding, no infection, no pain, rapid, safe and reliable.