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collimator |
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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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The small angle scattering effect from this material was studied to obtain initial data for the design of precise collimators. The idea of using such glass-fiber lenses or collimators to guide X-rays and neutrons originated with Muradin A. Inveon features advanced multi-pinhole SPECT collimators for improved sensitivity and spatial resolution; groundbreaking new PET and SPECT acquisition and processing technology; and a unique PET transmission method for faster and more accurate attenuation correction. |
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