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scintillation counter |
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counter /coun·ter/ (koun´ter) an instrument to compute numerical value; in radiology, a device for enumerating ionizing events.
Coulter counter an automatic instrument used in enumeration of formed elements in the peripheral blood. Geiger counter , Geiger-Müller counter an amplifying device that indicates the presence of ionizing particles, particularly β particles. scintillation counter a device for detecting ionization events, permitting determination of the concentration of radioisotopes in the body or other substance.
counter [kown´ter] an instrument or apparatus by which numerical value is computed; in radiology, a device for enumerating ionizing events. Coulter counter an automated instrument for performing blood counts, based on the principle that cells are poor electrical conductors compared with saline solution. Geiger counter (Geiger-Müller counter) a radiation counter using a gas-filled tube that indicates the presence of ionizing particles. It is very sensitive to β particles but relatively insensitive to γ and x-rays. scintillation counter a device for detecting ionization events, permitting determination of the concentration of radioisotopes in the body or other substance.
counter, n a device for enumerating ionizing events. counter, Geiger-Muller (G-M counter, Geiger counter), n.pr a highly sensitive gas-filled device that measures radiation. counter, proportional, n a gas-filled radiation detection tube in which the pulse produced is proportional to the number of ions formed in the gas by the primary ionizing particle. counter, scintillation
n a combination of phosphor, photomultiplier tube, and associated circuits for counting the light emissions that are produced in the phosphor. counter an instrument or apparatus by which numerical value is computed; in radiology, a device for enumerating ionizing events. Coulter counter see coulter counter. Geiger counter, Geiger-Müller counter a radiation counter using a gas-filled tube that indicates the presence of ionizing particles. scintillation counter a device for detecting beta and gamma rays, permitting determination of the concentration of radioisotopes in the body or other substance. It is more important for gamma rays, which are poorly measured by a Geiger counter. scintillation 1. the emission of sparks. 2. a particle emitted in disintegration of a radioactive element. scintillation camera a stationary device that records a photographic image of the distribution of radioactivity of an organ after the administration of a radionuclide. A sequence of photographs records the uptake and the distribution of the radionuclide. scintillation counter see scintillation counter. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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