Synonym(s)
Linac; Linear accelerator
DefinitionThis section has been translated automatically.
Facility for the acceleration of electrically charged atomic particles (particle accelerator) on a rectilinear path. After leaving the acceleration section, the electron beam is directed in the deflection unit exactly perpendicular to the treatment table by means of strong magnetic fields.
General definitionThis section has been translated automatically.
- There are two types of energy for irradiation:
- Electrons: The accelerated and deflected electrons are scattered over metal foils and brought to the desired field size by so-called electron tubes. This type of energy is mainly used for the irradiation of tumours in the body periphery
- Photons: The accelerated and deflected electrons collide with a "target". This results in an energy conversion into X-rays. Since the electrons in the target are decelerated and then release their energy as X-rays, these rays are also called braking rays.
Note(s)This section has been translated automatically.
With the development of linear accelerators it was possible to adapt the energy of the radiation and the type of radiation to the requirements of modern radiation therapy. Thus, the penetration depth can be varied and a better field homogeneity can be achieved. Linear accelerators play an increasing role in the treatment of malignant skin tumors.
Prof. Dr. med. Peter Altmeyer