ERRORS THAT CAN OCCUR Flashcards
Film Appears Too Dark:
Overdeveloping - Temperature or time too high OR developer too concentrated
Film Appears Too Light:
Underdevelopment - Temperature or time is too low OR developer is too weak/exhausted.
NO IMAGE:
- X-Ray machine was not switched on
- The film has been put into the fixer too quickly, so the film has not been exposed to any x-rays.
Partial Image:
- Film has been in contact with another developer tank
- Film has not been totally immersed in the developer
Fogged Image:
- Old film stock (lack of film stock rotation) or light leakage
- Daylight exposure before development
Stained Image:
Inadequte fixing or washing
Double Image:
Patient or tube moved during the X-Ray exposure.
Blurred Image:
- Patient movement
- Movement of the collimator tube head
White Spots:
- Chemical Splashes
- Water Splashes
- Debris on Automatic Processing Rollers.
Why Might X-Rays Appear BLACK?
Exposed to light before processing.
Elongation Of Image Means that…
Collimator angulation is too shallow
Foreshortening of image means that…
Collimator angulation is too steep - produces a squat image.
Coning of an image means…
Collimmator angulation is not central with the film - so film is only partly exposed.
Scratches or Fingerprints means…
Handler has been catching the film on the tank side during immersion
Not holding the film at the corners.
Black line across the film means…
Film has been bent or folded during processing
