Английская Википедия:Beam spoiler
A beam spoiler is a piece of material, placed into the path of the photon beam in radiotherapy. The purpose of the spoiler is to reduce the depth of the maximum radiation dosage.[1]
Composition
The beam spoiler is composed of a sheet of material which has a low atomic number,[2] typically lucite, the thickness of which is varied according to the beam energy and the distance by which the radiation dose must be shifted.[1]
Action
As the primary photon beam passes through the plate, secondary electrons are generated. The beam exiting the spoiler is a combination of the spoiler-attenuated photons and the spoiler-generated electrons. The electron component alters the depth dose in the buildup region in a way that depends on the photon beam energy, the field size, and the distance of the spoiler from the treatment surface.
References
Шаблон:Optics-stub
Шаблон:Medical-equipment-stub
- ↑ 1,0 1,1 Bentel, G.C. (1996) Radiation therapy planning p.103. McGraw-Hill Professional Шаблон:ISBN Retrieved September 2011.
- ↑ Specht, L., Yahalom, J. (2010) Radiotherapy for Hodgkin Lymphoma p.125. Springer. Шаблон:ISBN Retrieved September 2011
