Flashcards in Chapter 12 Deck (25):
What are the two basic components of radiographic film?
the base and emulsion
The main purpose of the gelatin emulsion in radiographic film is to hold what?
silver halide crystals
Crystals in film emulsion consist of two things?
Silver bromide and Silver iodide
The overcoat on radiographic film is a protective covering of what?
Latent image formation occurs during what?
A contaminant in the silver halide crystal creates the what?
The latent image can be seen only after what?
Photon interaction free the electrons form bromide and iodide atoms in the what?
Silver halide crystal
The latent image is made up of what atoms?
Photon interactions in the emulsion occur with exposure to what two things?
X-rays and light
High contrast film contains smaller silver halide crystals of what size?
Film is made with double emulsion to enhance the film what?
The layer of screen that lies closest to the film is what?
the protective coating
The light-emitting efficiency of the intensifying screen is improved by the what?
Screen characteristics are determined by the size of the phosphor crystals, thickness, of the phosphor layer and what?
A phosphorescent material emits light for a period of time after what?
An intensifying screen is an example of what two things?
luminescence and fluorescence
Luminescent material emits light after its outer shell electrons are what?
A screen that emits light after an exposure terminates is exhibiting screen what?
The intensification factor is a measurement of screen what?
The intensification factor is exposure required without screens divided by the what required with screens?
The intensification factor increases with increased what?
The ability of an intensifying screen absorb x-rays is called?
detective quantum efficiency
image noise increased with increased what?
conversion efficiency (CE)