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2010-10-20 19:48:10

quiz 5
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  1. what are the guidelines for prescribing dental radiographs to an adult and to a pregnant women?
    • adult 12-36 months
    • no change for pregnant women same as all other adults
  2. what is the aluminum filtration used above 70 kVp
    2.5 mm
  3. a rectangular collimator is better than circular why
    • restricts beam more than round
    • decreases patient exposure
  4. what length of PID is most effective
    16 inch rectangular
  5. what are two facts about the thyroid collar
    • not used on extraoral films
    • may be separate from lead apron
  6. what angle should the operator be standing to the primary beam?
  7. where must the film badge be worn
    waist level
  8. what is the MPD for a occupationally exposed person
    5 rem/year
  9. what is the MPD for a occupationally exposed pregnant women?
    same as for a nonoccupationally exposed person
  10. what does ALARA stand for?
    as low as reasonably achievable
  11. what 4 things do radiographs detect?
    • disease
    • lesions
    • conditions of teeth
    • conditions of bone
  12. the benefit of disease detection ____ _____ the risk of the small doses of xradiation
    far outweighs
  13. what is something you can instruct the patient to do to avoid gag reflex or help?
    lift the arm and leg
  14. if intraoral films are impossible what must you do?
    take extraoral films
  15. what is something you can do to avoid a gag reflex before taking the film?
    demonstrate placement
  16. if the patient is blind or visually impaired what must you do?
    communicate with clear verbal explanations
  17. developmental disability is a mental or physical disability that occurs before age __
  18. with an edentulous patient the film must extend _/_ inch beyond the ridge
  19. how many feet and at what angle must the operator stand to the primary beam?
    • 6 feet
    • right angle
  20. what does MPD stand for?
    maximum permissible dose