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sthomp88
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What strucure will appear most radiolucent on a radiograph?
air space
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Many areas of black and white = __________ scale contrast, and ________ contrast
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Many areas of gray = _______ scale contrast, and ________ contrast
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The stepwedge can be used to demonstrate __________. It can also be used to monitor the ________ of film and film processing
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the _______ _______ of the ________ serves as a focal spot and converts electrons into x-ray photons
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The _______ the focal spot the sharper the image. Also, the emulsion of faster films contain __________ crystals that produce ________ image sharpness
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a decrease in object-film distance = a ______ in magnification
decrease
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What portion of the silver halide crystals is chemically removed during the reduction process of film processing?
halide portion of the exposed energized silver halide crystals
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What results in precipitated black metalic silver?
reduction of the exposed silver halide crystals
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true or false. selective reduction refers to the reduction of the energized exposed silver halide crystals into black metallic silver, while the unenergized unexposed silver halide crystals are removed from the film
true
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White areas on the film result from the removal of ___________ by the __________ solution
- unexposed silver halide crystals
- fixer
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When does the film emulsion harden?
during fixation by the fixer solution
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Both powder and liquid concentrate forms of film processing solutions must be mixed with ____________
distilled water
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How often should the film processing solutions be replenished? Changed?
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What is the optimum temperature for developing?
68*
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What is the purpose of the restrainer?
to control the developer, and prevent it from developing the exposed and unexposed crystals
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true or false. The restrainer in the developer solution stops the development of both unexposed and exposed crystals, it is most effective in stopping the development of the unexposed crystals
true
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What is about the average amount of films that are processed in a day?
30
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What is the purpose of the hardening agent in the fixer solution?
harden and shrink the gelatin in film emulsion
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Films that are unwrapped too close to the safe light for more than ____ -_____ minutes appear fogged. Also, a safelight must be placed a minimum of ______ feet away from the film and working area
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weakened or exhausted developer solution produces what?
weakened or exhausted fixer solution produces what?
- film with reduced density and contrast
- films can turn a yellow or brown color
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How often should the automatic film processor be cleaned
daily to weekly
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an extraoral sized cleaning film removes any ________________ or ______ from the rollers of the automatic processor
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Developer spots are ______ spots on the film. Fixer spots are _________ spots on the film
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What is the appearance of static electricity on the film?
black, thin, branching lines
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What will help you view the films better once they are mounted?
removing extraneous light
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When and where should films be mounted?
infront of the patient, immediately after processing, and in an area equiped for mounting
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curve of spee curves________towards the distal
up
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If you have higher temperature you should ________ developer time
decrease
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