densitometer

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densitometer

 [den″-sĭ-tom´ĕ-ter]
1. an instrument for determining density or specific gravity of a liquid.
2. an instrument used to measure the degree of exposure (darkening) on photographic or x-ray film.

den·si·tom·e·ter

(den'si-tom'ĕ-tĕr),
1. An instrument for measuring the density of a fluid. Synonym(s): densimeter
2. An instrument for measuring, by virtue of relative turbidity, the growth of bacteria in broth; useful in microbiologic assay of nutrients and antibiotics, phage studies.
3. An instrument for measuring the density of components (for example, protein fractions) separated by electrophoresis or chromatography, using light absorption or reflection.
4. An electronic instrument for measuring the blackening of radiographic film by x-ray exposure; used for film sensitometry, bone densitometry, measurement of line spread function (microdensitometer).
5. An instrument for measuring the extent to which a material absorbs or reflects light.
[L. densitas, density, + G. metron, measure]

densitometer

(dĕn′sĭ-tŏm′ĭ-tər)
n.
1. An apparatus for measuring the optical density of a material, such as a photographic negative.

den′si·tom′e·try (-trē) n.

densitometer

[den′sitom′ətər]
Etymology: L, densus + Gk, metron, measure
a device that uses a photoelectric cell to detect differences in the intensity of light transmitted through a substance, such as x-ray film.

den·si·tom·e·ter

(dens'i-tom'ĕ-tĕr)
1. An instrument for measuring the density of a fluid.
Synonym(s): densimeter.
2. An instrument for measuring, by virtue of relative turbidity, the growth of bacteria in broth; useful in microbiologic assay of nutrients and antibiotics and phage studies.
3. An instrument for measuring the density of components (e.g., protein fractions) separated by electrophoresis or chromatography, using light absorption or reflection.
4. An electronic instrument for measuring the blackening of radiographic film by x-ray exposure; used for film densitometry, bone densitometry, measurement of line spread function (microdensitometer).
[L. densitas, density, + G. metron, measure]

den·si·tom·e·ter

(dens'i-tom'ĕ-tĕr)
1. An instrument for measuring the density of a fluid.
2. An instrument for measuring the growth of bacteria in broth.
3. An instrument for measuring the density of components separated by electrophoresis or chromatography, using light absorption or reflection.
4. An electronic instrument for measuring the blackening of radiographic film by x-ray exposure; used for film densitometry and bone densitometry.
[L. densitas, density, + G. metron, measure]

densitometer (den´sitom´ətur),

n an instrument for determining the degree of darkening of developed photographic or radiographic film, based on the use of a photoelectric cell to measure the light transmission through a given area of the film.

densimeter, densitometer

1. an instrument for determining density or specific gravity of a liquid.
2. an instrument used for measuring photographic transmission and/or reflection density.
References in periodicals archive ?
Densitometrically, the gelatinase concentrations appeared to be two- to fourfold higher in type II NAFs than in type I NAFs (P <0.
Each band was densitometrically quantified by image analysis and normalized vs.
Electrophoresis of the LDL fraction in sodium dodecyl sulfate-polyacrylamide gels stained with Coo-massie blue R250 revealed contamination of apo A-I in that fraction that was estimated densitometrically as <1.
For quantification the signals of the filters were scanned and evaluated densitometrically using a phosphoimager BAS 1500 from Fuji (Raytest, Straubenhardt, Germany).
12), using a back-propagation ANN that accepts 94 online input elements from the [gamma]-region of densitometrically scanned data (Hitesystem 310; Olympus), achieved a correct diagnosis in 90% (45 of 50) of pathological or suspect samples and a correct diagnosis in 234 of 256 samples lacking MCs (specificity, 91%; PPV, 71%).