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collimator |
Also found in: Wikipedia, Hutchinson | 0.07 sec. |
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collimator [kol′imā′tər] Etymology: L, collinare, to bring into alignment a device for limiting the size and shape of a radiation beam. It is used to reduce scatter radiation, thereby decreasing the patient dose needed and increasing radiographic quality. collimator (kol´imātur), n a diaphragm or system of diaphragms made of an absorbent material and designed to define the dimensions and direction of a beam of radiation.
collimator a device, sometimes a diaphragm, or series of diaphragms, which control the direction and the dimensions of the x-ray beam.
collimator An optical apparatus for producing parallel rays of light. It usually consists of a positive achromatic lens, with an illuminated object (a slit, a graticule, a scale, etc.) placed at one of its focal points, so that light from any point on the object emerges from the collimator parallel. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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