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rad imaging

film, rad

QuestionAnswer
observable difference between x-ray film and photographic film is thickness and rigidity of the base
principal characteristic of the emulsion that makes it particularly x-ray sensitive is its sensitivity center
average silver halide crystal surface size in radiographic film is 1.0 um
radiographic film base appears blue because a tint is added to make viewing more comfortable
celluslose nitrate and cellulose triacetate are used in what component of film in the film base
emulsion that is commonly used in x-ray film consists of silver halide and gelatin
common base in contemporary x-ray film polyester
ensures uniform contact of the emulsion to the base adhesive layer
the overcoat of film usually consists of? gelatin
in film, dimensional stability is the property of maintaining the size and shape of the base
principle purpose of gelatin in film emulsion support the silver halide crystals uniformly
most important property of silver halide in production of the latent image atomic number
x-ray film is sensitive to x-rays, gamma rays, visible light
x-ray film used in radiographic intensifying screens usually has what type of emulsion emulsion coat on both sides of the base
silver bromide is a principal component of what the silver halide crystals in the emulsion
the latent image is formed where silver halide crystals
during the photographic process, metallic silver accumulates where sensitivity center
a collection of silver atoms in the latent image occurs at the crystal level
the sensitivity center is silver __________ sulfide
what additive/impurity is added to emulsion to form sensitivity specs AgBr (silver sulfide)
image-forming and remnant are referred to as the radiation exiting the patient that is responsible for the latent image formation
the interstitial atoms in a crystal of silver halide are silver, bromide, iodine
the formation of the latent image follows what interaction with the emulsion photoelectric effect
theory that best explains the photographic effect gurney-mott theory
the difference between fast film and slow film is silver halide crystal __________ concentration
the spectral response of an emulsion refers to absorption of visible light
calcium tungstate screen emit what type of light blue and blue-violet light
factors that can cause fog darkroom light leak, background radiation, humidity, temperature
orthochormoatic film is sensitive to what light? green light
rare earth films require what color safelight red
describe mammography film fine grain film used with a screen
most rare earth screen emit what color light ultraviolet, blue, green and red
what are the optimal temps and humidity for storing film 20C/68F or lower with 30-60% humidity
film resolution is determined by size of silver halide crystals
smaller crystals result in what type of resolution higher resolution
silver halide crystals are sometimes called grains/graininess
film sensitivity is determined by these factors silver halide crystal size, number of sensitivity specs and thickness of emulsion layer
compare film speed of smaller crystals vs larger crystals smaller = slower film speed larger = faster film speed
compare film speeds related to emulsion thickness of thick vs thin thick = faster film speed thin = slower film speed
what are the primary characteristics of film resolution, contrast, speed, latitude
ability of film to stop light is termed opacity
instrument that provides a readout of the amount of density (blackening) on a film densitometer
type of sensitometric equipment sometimes referred to a step wedge, increasingly thick, uniform absorbers penetrometer
measurement of the characteristic response of film exposure and processing? sensitomertry
as contrast increases what happens to the latitude? decreases
what component makes silver halide crystals photosensitive? sensitivity specs
inherent object unsharpness refers to? constant motion (ie heart)
as the OID increases the detail becomes? less sharp
as the SID increases detail becomes? sharper
as the OID decreases the details become? sharper
the most important consideration in selecting screen-film is? the spectral absorption characteristics
Created by: srehrauer