Diagnostic Procedures & Interpretation Flashcards
7 cards from real Radiation Health and Safety Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Diagnostic Procedures & Interpretation flashcards as text
A periapical image shows teeth that appear longer than the actual teeth. What is the most likely cause?
Answer: Insufficient vertical angulation
Insufficient vertical angulation (beam too flat) stretches the image, causing elongation.
Overlapped interproximal contacts on a bitewing image result from which error?
Answer: Incorrect horizontal angulation
The central ray must pass through the contacts at a right angle in the horizontal plane to open them.
A rounded or straight unexposed clear area on one side of a film, known as a cone cut, is caused by:
Answer: The PID not covering the entire receptor
A cone cut occurs when the beam does not cover the whole receptor because the PID is misaligned.
A herringbone (tire-track) pattern on an exposed film indicates what?
Answer: Film was placed backward
The lead foil in the packet shows its pattern when the film is exposed from the back.
A film that is too light (low density) can be caused by:
Answer: Insufficient exposure time
Too little exposure delivers too few photons to the film, producing a light image.
A completely black processed film most likely means:
Answer: The film was exposed to white light
White light exposure turns all silver halide crystals to metallic silver, producing a black film.
The primary diagnostic purpose of a bitewing radiograph is to detect:
Answer: Interproximal caries and crestal bone levels
Bitewings show the crowns of upper and lower teeth together, ideal for interproximal caries and alveolar crest assessment.
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