counter /coun·ter/ (koun´ter) an instrument to compute numerical value; in radiology, a device for enumerating ionizing events.
counter [kown´ter]
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.
Gei·ger counter (g  g r)n. An instrument that measures the intensity of radiation by detecting radioactive particles as they cross a metal or glass tube filled with gas, causing ionization of the gas molecules and producing an electrical discharge. Also called Geiger-Müller counter. |
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.
Geiger counter, Geiger-Müller counter
an amplifying device that indicates the presence of ionizing particles emitted by a substance; used as a means of determining the presence of radioactivity.
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