X-ray filter

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An X-ray filter (also known as pre-filtering) is a plate made of light or heavy metal that is placed between the X-ray tube and the skin during X-ray examinations in order to absorb the soft and medium-soft rays that can damage the skin . These soft and medium-soft rays are of no diagnostic relevance since they are absorbed by the patient's tissue and do not arrive at the detector . For this reason, the radiation is “hardened”, that is, the softer (longer-wave and less penetrable) rays are filtered out in the X-ray filter. The spectral distribution of the X-ray tube becomes more uniform, "more homogeneous", since the soft radiation component is cut out, so to speak.

literature

  • W. Schlungbaum, U. Flesch, U. Stabell: Medical radiation. 7th edition, Walter de Gruyter, 1993, ISBN 3-11-012850-0 , p. 84 ( limited preview in the Google book search).