collimator

(redirected from collimators)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to collimators: interferometer

collimator

 [kol´ĭ-ma″ter]
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.

col·li·ma·tor

(kol'i-mā'ter),
A device of high absorption coefficient material used in collimation.

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.

col·li·ma·tor

(kol'i-mā-tŏr)
A device with blocks or jaws that restrict a beam of emitted radiation to a given area; composed of a high-absorption coefficient material such as lead or tungsten.

collimator

1. A shield, shutter or cone, usually of lead, attached to an X-ray tube to limit the width of the beam.
2. A thick perforated lead plate designed to allow passage only of parallel radiation, as in a GAMMA CAMERA.

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.

col·li·ma·tor

(kol'i-mā-tŏr)
A device of high absorption coefficient material used in collimation.

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.
References in periodicals archive ?
We achieved the same sub-millimeter precision we've come to rely on with the CyberKnife System, in 20 minutes, so half the time compared to previous treatment session using another collimator.
In 2003, we found out that diurnal changes in histogram shapes also disappear when alpha-radioactivity is measured with collimators that issue alpha-particle beams directed towards the Pole star.
Using the data of the small angle scattering process that was obtained, a multi-diaphragm collimator has been designed.
In addition, a new device, the multileaf collimator, allows for the collimation of the x-ray beam during treatment.
FDA 510(k) clearance was granted to Varian's Millennium MLC-120 multileaf collimator (MLC), a device used with its medical linear accelerators for increasing the cancer-killing energy directed at tumors, while minimizing the radiation dose to surrounding healthy tissue.
The InCise MLC is the world's first multileaf collimator to be available on a robotic platform, the CyberKnife M6 System.
The smallest possible distance between the collimator (camera head) researcher and institution (.
When collimators were West and East directed no synchronism by absolute time between Puschino and Novolazarevskaya was noticed.
has introduced a new beam-shaping system that will allow physicians to deliver more precise cancer radiation therapy treatments than ever before - - the Millennium MLC(TM)-120 multi-leaf collimator.
The thermal neutron background component from the thermal and epithermal neutrons multiply scattered on collimators will depend on the collimation system.
Providing clearer images at a higher resolution than traditional single or multi-pinhole collimators, this advanced Single Photon Emission Computed Tomography (SPECT) solution could allow researchers to more quickly and accurately image new diagnostic and therapeutic compounds in preclinical studies.