Chapter 18 Flashcards
What is the corrective action for a radiograph that displays a ‘tire track’ pattern?
Position film intraorally with the tube side toward the source of radiation.
What does a clear or blank image indicate?
There was no exposure to radiation.
What happens if a film is accidentally placed in the fixer before the developer?
The resultant image will be blank.
What results from residual glove powder on the fingers that touches the film?
Black smudges.
What does improper or insufficient washing of radiographic films result in?
Brown films.
Does misuse of a cotton roll to stabilize the image receptor affect the image?
TRUE
Should the image receptor be placed with the long dimension horizontal for anterior periapical radiographs?
FALSE
Does a herringbone or tire track pattern appear if the film packet was placed reversed?
TRUE
Does elongation error cause images to appear stretched out?
TRUE
Can assembling an image receptor holder incorrectly lead to conecut error?
TRUE
Does a dark image occur when the developing solution is diluted?
FALSE
Does a black film indicate accidental exposure to white light?
TRUE
What causes a partial image on the radiograph?
The level of developer is too low to cover the entire film.
What causes white spots on the film?
Premature contact with the fixer solution.
What causes dark spots on the film?
Premature contact with the developer.
Can a light radiograph result from either underexposure or underdeveloping?
TRUE
Can a dark radiograph result from either overexposure or overdeveloping?
TRUE
Can a scratched safelight filter or incorrect bulb wattage result in film fog?
TRUE
What appears on a processed film where a film packet was bent or subjected to excessive pressure?
A black line.
Does a distomesial projection of the x-ray beam result in more severe overlapping in the posterior region?
FALSE
Can exposing film to excessive heat and humidity compromise radiographic quality?
TRUE
Is electronic noise the digital equivalent of film fog?
TRUE
What should be done to avoid radiographic error while opening a film packet in the darkroom?
Remove the film from the outer packaging slowly.
What happens if the darkroom door is accidentally opened during unwrapping of the film packets?
The resultant image will appear black.
What results from bending a phosphor plate?
A white or missing image area.
What causes an iridescent stain on the radiograph?
Oxidation and exhaustion of the developer.
What causes discrete black lines to appear on the radiograph?
Bending the film or excessive pressure.
What causes the black paper in the film packet to become stuck to the film?
A tear or break in the outer protective wrapping of the film packet.
What produces thin black lines or smudges often in a pattern on the radiograph?
Static electricity.
What is film fog?
The formation of a thin, cloudy layer that fogs or veils the film surface.
What is film fog susceptible to?
Stray radiation.
What conditions permit white light film fog?
A white light leak in the darkroom.
Does radiographic film have an expiration date?
Yes.
Can fluorescent watch faces and dials fog film?
Yes.
