collimator


collimator

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col·li·ma·tor 'käl-ə-.māt-ər n a device for obtaining a beam of radiation (as X-rays) of limited cross section

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n.
a device, used in diagnostic radiology or radiotherapy, to produce a narrow beam of radiation by means of metallic slits that control the size of the beam from a radiation source. Many new linear accelerator use multi-leaf collimators, a specialized form of collimator using individual 'leaves' (1 cm or smaller) to shape the radiation treatment field around the tumour. Collimators are also used on radiation detectors, in particular in gamma camera, for which the exact source of radioactivity needs to be known to produce an accurate image.

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col·li·ma·tor (kolґĭ-ma″tər) a diaphragm or system of diaphragms made of an absorbing material, designed to define and restrict the dimensions and direction of a beam of radiation.

Medical dictionary. 2011.

Look at other dictionaries:

  • Collimator — Col li*ma tor, n. 1. (Astron.) A telescope arranged and used to determine errors of collimation, both vertical and horizontal. Nichol. [1913 Webster] 2. (Optics) A tube having a convex lens at one end and at the other a small opening or slit… …   The Collaborative International Dictionary of English

  • collimator — [käl′əmāt΄ər] n. [see COLLIMATE] 1. a small telescope with cross hairs at its focus, fixed to another telescope, surveying instrument, etc. for adjusting the line of sight 2. a device that causes a beam of radiation, as light, to move as parallel …   English World dictionary

  • Collimator — Example of a particle collimator A collimator is a device that narrows a beam of particles or waves. To narrow can mean either to cause the directions of motion to become more aligned in a specific direction (i.e., collimated or parallel) or to… …   Wikipedia

  • collimator — /kol euh may teuhr/, n. 1. Optics. a. a fixed telescope for use in collimating other instruments. b. an optical system that transmits parallel rays of light, as the receiving lens or telescope of a spectroscope. 2. Physics. a device for producing …   Universalium

  • collimator — n. a device, used in diagnostic radiology or radiotherapy, to produce a narrow beam of radiation by means of metallic slits that control the size of the beam from a radiation source. Many new linear accelerators use multi leaf collimators, a… …   The new mediacal dictionary

  • collimator — kolimatorius statusas T sritis Standartizacija ir metrologija apibrėžtis Optinis įtaisas lygiagrečiam elektromagnetinių bangų srauto pluoštui gauti. atitikmenys: angl. collimator vok. Kollimator, m rus. коллиматор, m pranc. collimateur, m …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • collimator — kolimatorius statusas T sritis chemija apibrėžtis Optinis įtaisas lygiagrečiam šviesos spinduliuotės srautui gauti. atitikmenys: angl. collimator rus. коллиматор …   Chemijos terminų aiškinamasis žodynas

  • collimator — kolimatorius statusas T sritis fizika atitikmenys: angl. collimator vok. Kollimator, m rus. коллиматор, m pranc. collimateur, m …   Fizikos terminų žodynas

  • collimator — noun Date: 1865 1. a device for producing a beam of parallel rays (as of light) or for forming an infinitely distant virtual image that can be viewed without parallax 2. a device for obtaining a beam (as of particles) of limited cross section …   New Collegiate Dictionary

  • collimator — noun a) An optical device that generates a parallel beam of light. Often used to compensate for laser beam divergence. b) A similar device that produces a parallel beam of particles such as neutrons …   Wiktionary


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