RTE 1401 ACTUAL FINALS ANSWERS AND
QUESTIONS SET A+
✔✔window width - ✔✔adjusting the contrast on an image
wide width= wider scale of contrast
✔✔ screen film - ✔✔most widely used film and used with 1 or 2 intensifying screens
-can be single or double
✔✔direct exposure film - ✔✔used without an intensifying screen, has higher resolution
but needs more XR which increase patient dose
✔✔fast screen-speed has... - ✔✔large silver-halides and used with faster speed screen
film.
is more dense, has less detail and less patient dose
✔✔slow screen- speed has... - ✔✔small silver-halides and used with lower speed
screen film.
is less dense, has more detail, and more patient dose
✔✔spectral sensitivity (regarding film) - ✔✔the color of light to which a particular film is
most sensitive
✔✔panchromatic - ✔✔sensitive to ALL spectrums of light
✔✔orthrochromatic - ✔✔relatively insensitive to red spectrum
✔✔spectral matching - ✔✔matching the color sensitivity of the film to the color emission
of the intensifying screen
✔✔Parts of the film processor - ✔✔developer, fixer, wash tank, dryer, rollers
✔✔developer (film processor) - ✔✔reduces (converts silver to black metallic) the film
-uses two alkaline pH agents: phenidone and hydroquinone
, ✔✔phenidone - ✔✔alkaline pH agent in the developer that works FAST, responsible for
detail and producing the lighter shades in an XR
✔✔hydroquinone - ✔✔alkaline pH agent in the developer that works SLOW and is
responsible for heavy and dark densities in an XR
✔✔fixer (film processor) - ✔✔holds the acidic pH clearing agents that clear the
unexposed silver from film and hardens emulsion: ammonium thiosulfate
✔✔wash tank (film processor) - ✔✔holds water that rinses the excess chemicals
✔✔dryer (film processor) - ✔✔uses heat to dry the film (similar to blow dryer)
✔✔rollers used in developer (4) - ✔✔entrance rollers, crossover rollers, turn-around
rollers, and guide shoes
✔✔entrance rollers - ✔✔determines rate of feed and indicates replenishment system
✔✔crossover rollers - ✔✔helps film to crossover from one tank to another and acts as
squeegees to clean off excess chemicals
✔✔turn-around rollers - ✔✔guides film to turn aroundto exit each vat
✔✔guide shoes - ✔✔guides film to keep fro popping out of the rollers
✔✔Intensifying screen layers - ✔✔base, reflective layer, phosphor layer, protective
layer (foam is next to base to connect to cassette and create stability)
✔✔phospher layer of intensifying screen - ✔✔dictates the screen speed and is made of
rare Earth elements that emit light
✔✔What are the rare Earth elements that make up the phosphors layer of the
intensifying screen? - ✔✔gadolinium, lanthanum, and yttrium
✔✔What determines screen speed? - ✔✔size and thickness of phosphor layer
✔✔Small size phosphors will have a ____speed. - ✔✔slow; therefore better detail,
requires more mAs= higher patient dose
✔✔Thick layer of phosphor will have a _____ speed. - ✔✔fast; therefore less detail, less
mAs= less patient dose
✔✔reflective layer of intensifying screen - ✔✔reflects phosphorus light back toward film
QUESTIONS SET A+
✔✔window width - ✔✔adjusting the contrast on an image
wide width= wider scale of contrast
✔✔ screen film - ✔✔most widely used film and used with 1 or 2 intensifying screens
-can be single or double
✔✔direct exposure film - ✔✔used without an intensifying screen, has higher resolution
but needs more XR which increase patient dose
✔✔fast screen-speed has... - ✔✔large silver-halides and used with faster speed screen
film.
is more dense, has less detail and less patient dose
✔✔slow screen- speed has... - ✔✔small silver-halides and used with lower speed
screen film.
is less dense, has more detail, and more patient dose
✔✔spectral sensitivity (regarding film) - ✔✔the color of light to which a particular film is
most sensitive
✔✔panchromatic - ✔✔sensitive to ALL spectrums of light
✔✔orthrochromatic - ✔✔relatively insensitive to red spectrum
✔✔spectral matching - ✔✔matching the color sensitivity of the film to the color emission
of the intensifying screen
✔✔Parts of the film processor - ✔✔developer, fixer, wash tank, dryer, rollers
✔✔developer (film processor) - ✔✔reduces (converts silver to black metallic) the film
-uses two alkaline pH agents: phenidone and hydroquinone
, ✔✔phenidone - ✔✔alkaline pH agent in the developer that works FAST, responsible for
detail and producing the lighter shades in an XR
✔✔hydroquinone - ✔✔alkaline pH agent in the developer that works SLOW and is
responsible for heavy and dark densities in an XR
✔✔fixer (film processor) - ✔✔holds the acidic pH clearing agents that clear the
unexposed silver from film and hardens emulsion: ammonium thiosulfate
✔✔wash tank (film processor) - ✔✔holds water that rinses the excess chemicals
✔✔dryer (film processor) - ✔✔uses heat to dry the film (similar to blow dryer)
✔✔rollers used in developer (4) - ✔✔entrance rollers, crossover rollers, turn-around
rollers, and guide shoes
✔✔entrance rollers - ✔✔determines rate of feed and indicates replenishment system
✔✔crossover rollers - ✔✔helps film to crossover from one tank to another and acts as
squeegees to clean off excess chemicals
✔✔turn-around rollers - ✔✔guides film to turn aroundto exit each vat
✔✔guide shoes - ✔✔guides film to keep fro popping out of the rollers
✔✔Intensifying screen layers - ✔✔base, reflective layer, phosphor layer, protective
layer (foam is next to base to connect to cassette and create stability)
✔✔phospher layer of intensifying screen - ✔✔dictates the screen speed and is made of
rare Earth elements that emit light
✔✔What are the rare Earth elements that make up the phosphors layer of the
intensifying screen? - ✔✔gadolinium, lanthanum, and yttrium
✔✔What determines screen speed? - ✔✔size and thickness of phosphor layer
✔✔Small size phosphors will have a ____speed. - ✔✔slow; therefore better detail,
requires more mAs= higher patient dose
✔✔Thick layer of phosphor will have a _____ speed. - ✔✔fast; therefore less detail, less
mAs= less patient dose
✔✔reflective layer of intensifying screen - ✔✔reflects phosphorus light back toward film
