Faults Flashcards
Revision for online assessment
What has happened if a radiograph appears completely ‘blank’?
X-ray machine not switched on
Put into the fixer solution first
How will a radiograph appear if it has been exposed to light?
Fogged
Foggy
Black
What name do we give to an image on a radiograph which has been partially exposed?
Coning
How would a radiographic image appear if the film had been positioned incorrectly i.e the foil facing the collimator?
With a ‘herringbone pattern’
What has happened if the image appears stretched or the apex is missing off the end of a periapical?
Elongation
What has happened if the teeth on an image appear stunted, short, squat or squashed?
Foreshortening
What would cause ‘blank spots’ on an image?
Being splashed by fixer solution prior to developing
What would cause crystals to be present on a processed radiograph?
Insufficient washing off of the fixer solution
How would a radiograph appear if deteriorated or old Fixer solution had been used during processing?
The radiograph would have brown or green staining
What causes a ‘fading’ image?
Inadequate fixing time (not in the fixer solution long enough)
What causes an image to appear ‘dark’?
Too long in the developer solution (overdeveloped)
The developer solution is too concentrated
The developer solution is too hot
Over exposed
What causes an image to appear ‘faint or pale’?
Not long enough in the developer solution (underdeveloped)
The developer solution is exhausted/deteriorated
The developer solution is too cold
Under exposed
What would cause the loss of a film?
Stuck to the sides of the processing tanks
What would cause an image to appear ‘blurred’?
Collimator moved
Patient moved
What colour would a radiograph appear if it looked ‘overexposed’ or ‘overdeveloped’?
Black/fogged/dark
