radiology

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Author:
sweetpea281
ID:
40384
Filename:
radiology
Updated:
2010-10-06 23:34:30
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ch5review
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Description:
ch 5 quiz questions from chapter
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  1. t/f every patient should be evaluated individually for dental radiographs
    true
  2. t/f the 8inch PID is more effective in reducing radiation exposure to the patient than the 16inch.
    false
  3. t/f pointed cones should not be used because of increased scatter radiation.
    true
  4. t/f the thyroid collar must be worn for all intraoral and extraoral films.
    false
  5. t/f if necessary the dental radiographer may hold a film in the patients mouth to ensure a diagnostic image.
    false
  6. which of the following describes the use of a filter in a dental xray tubehead
    A.a filter reduces the size and shape of the beam
    B.a filter remove the dose of radiation to the thyroid glad
    C.a filter decrease the mean energy of the beam
    D.a filter removes low energy xrays
    D. a filter removes low energy xrays (long wavelength)
    (this multiple choice question has been scrambled)
  7. which of the following is NOT a component of inherent filtration?
    A.oil
    B.unleaded glass window
    C.a leaded cone
    D. tubehead seal
    C. a leaded cone
    (this multiple choice question has been scrambled)
  8. which of the following is the most effective method of reducing patient exposure to radiation?
    A.film-holding devices
    B.round PID
    C.lead apron
    D.fast films
    D.fast films
    (this multiple choice question has been scrambled)
  9. which of the following position indicating devices is most effective in reducing patient exposure?
    A.conical PID
    B.rectangular PID
    C.round PID
    D. all are equally effective in reducing patient exposure
    B.rectangular PID
    (this multiple choice question has been scrambled)
  10. which of the following devices restricts the size and shape of the xray beam?
    A.barrier
    B.filter
    C.collimator
    D.film badge
    C. collimator
    (this multiple choice question has been scrambled)
  11. which of the following is used as a collimator?
    A.aluminum plate
    B. copper plate
    C.lead plate
    d.all of the above
    C. lead plate
    (this multiple choice question has been scrambled)
  12. which of the following describes the function of filtration?
    A.increases long wavelengths
    B.reduces low energy waves
    C..increase divergent rays
    D.increases scatter radiation
    B.reduces low energy waves
    (this multiple choice question has been scrambled)
  13. which of the following is the recommended size of the beam at the patients face?
    A.2.75 inches
    B.3.25 inches
    C.3.50 inches
    D.4.0 inches
    A.2.75 inches
    (this multiple choice question has been scrambled)
  14. which of the following terms describes the dose of radiation that the body can endure with little or no chance of injury?
    A.radiation limit
    B.maximum permissible dose
    C.ALARA
    D.occupationally exposed dose
    B.maximum permissible dose
    (this multiple choice question has been scrambled)
  15. which of the following is TRUE of film badges.
    A.film badges should be worn at waist level when exposing xray films
    B.film badge should be worn when the radiographer is under going xray exposure
    C.film badges can be shared between employees
    d.all of the above are true.
    A.film badges should be worn at waist level when exposing xray films.
    (this multiple choice question has been scrambled)
  16. provide the requirements for proper filtration:
    a. machines operating at 70kVp or lower require ___mm aluminum
    b.machines operating above 70kVp require ___mm aluminum
    • a.1.5
    • b.2.5
  17. state the angle that the dental radiographer should stand to the primary beam ___-___ degrees
    90-135 degrees (perpendicular)
  18. state the formula for maximum accumulated dose
    MAD=(N-18) X 5 rems/year
  19. wtate the maximum permissible dose for occupationally exposed persons ____ rems/year (____Sv/year)
    • 5.0
    • .05
  20. state the maximum permissible dose for nonoccupationally exposed persons ____rem/year (___Sv/year)
    • .1
    • .001

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