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60 Cards in this Set
- Front
- Back
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The acid in the fixer serves to "neutralize" the developer.
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True
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When a positive silver ion of the film obtains one of the free electrons in the crystal lattice, a stable black ______silver ion is formed.
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metallic
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Which type of film is sensitive to all colors?
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panchromatic
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If the fixer is not cleared from the film, it may result in:
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yellowing of the emulsion
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The clearing agent will bond with ___silver halides.
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unexposed
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The image becomes visible during:
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development
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Radiographic film should be stored:
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at a temp below 68 degrees F, in 30 to 60, percent humidity upright
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Which reducing agent slowly reduces silver halides, producing heavy density?
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hydroquinone
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The wash cycle serves to rid the film of chemical residue.
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True
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The acid in the fixer serves to "neutralize" the developer.
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True
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For darkroom lighting, the_______directs light upward the ceiling and then reflects back downward.
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kodak all purpose filter
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The special coating applied to the film to prevent the "cross over effect" is called the _________ coating.
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antihilation
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What describes the process by which duplicate film is "pre-exposed" in order to reproduce a radiographic image?
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Solarization
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Each of the following is a primary step of automatic processing except:
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ripening
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The sensitivity speck serves as an electrode to attract:
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free silver atoms
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In radiographic film, each crystal of the cubic lattice is made of the following atoms except:
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potassium
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Which reducing agent quickly reduces silver, producinig more shades of gray?
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phenidone
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Adhesive is used to:
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glue the emulsion to the base
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Which silver recovery system constitutes silver precipitation collected onto steel wool?
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metallic displacement
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The purpose of radiographic processing is to convert the _______ image into the _____________image.
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latent, invisible
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T or F. No practical amount of mAs can ever compensate for inadequate kVp.
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True
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The base of the intensifying screen is made of polyester plastic.
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True
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Aluminum is embedded in the back of cassettes to prevent backscatter from fogging the film.
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False
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Poor film/screen contact is the most common screen resolution problem.
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True
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Bent cassette frames can be a cause of poor film-screen contact.
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True
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Increasing the kVp can result in an increase to the screen speed.
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True
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What type of screen was present when Roentgen discovered x-rays?
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Barium Plantinocyanide
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Poor film-screen contact can be caused by?
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warped cassette, bent cassette frame, broken cassette latch
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200 speed rare earth screens require how much less radiation than 400 speed rare earth screens?
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they require more radiation
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The image on a radiograph before development is known as what?
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a latent image
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What does it mean if a radiographic film is duplitized?
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emulsion is coated on two sides
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Which of the following tests will determine film-screen contact?
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wire mesh test
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400 speed rare earth screens require how much less radiation than 200 speed rare earth screens?
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50%
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Which of the following is not a characteristics of effective intensifying screen phosphors?
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maximum phosphorescence
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Which of the following relates to the principle of light reflecting through the film base and bouncing off of the lower screen and back up again?
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Parallax Effect
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Resolution is measured by all of the following except:
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line to image distance
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The opposite of blur on a film:
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gain of contrast
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What will increase the recorded detail in a radiograph?
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decreasing the screen speed
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Who developed the calcium tungstate intensifying screen?
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Thomas Edison
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Silver ________ is found in radiographic film.
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bromide
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Screen speed depends on all of the following except:
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type of film used
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Which of the following screen speeds will produce the best recorded detail?
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50
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Resolution can be improved by:
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decreased speed screen
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An unexposed radiographic film will have a slight density after processing. What is this density called?
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base plus fog
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The use of intensifying screens will cause a slight blur in the radiographic image due to:
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diffusion of light rays
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If a 400 speed screen were used with 5 mAs for a knee raidograph, what mAs would be required if using a 200 speed screen?
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10 mAs
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An increase in the size of the phosphors of the intensifying screen results in a _____ in screen speed.
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increase
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Which is not a function of the cassette?
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protect film from backscatter
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What is another name for the "crossover" effect?
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Parallax Effect
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A characteristic curve is a graphic representation of:
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density and exposure
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What material is included in the back of a cassette to reduce the residual beam and absorb backscatter?
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a thin sheet of lead foil
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What type of screen did Thomas Edison use to convert x-ray photons to light?
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calcium tungstate
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Which of the following factors is best for reducing the risks of motion?
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shortest possible exposure time
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Resolution can be improved by which of the following:
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decreased phosphor size
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What radiolucent material is not used in the front of a cassette?
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lead
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An example of effective use of a "detailed" or "fine" cassette would be:
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a hand radiograph
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What are cassettes made of?
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graphite carbon fiber
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Does the reflective layer of the screen increase or decrease resolution?
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decrease
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What is the normal life of intensifying screen?
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5 to 7 years
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Gadolinium oxysulfide rare-earth screens emit _____ light.
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green
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