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Fluoro Ch. 12 Rad Protection

  1. The concept of ALARA stresses that all radiation doses to _____ bekept as low as reasonably achievable.
    • Patients
    • Public
    • X-ray operator
  2. The probability of an effect occurring rather than it's severity refers to a _____
    Stochastic effect
  3. What type of effect is regarded as a function of radiation dose without a threshold?
    Stochastic effect
  4. Stochastic effects are _____




    D) Somatic effects & carcinogenetic.
  5. The severity of an effect varies with the radiation dose and for which a threshold may occur refers to _____
    • Non-stochastic effects
    • Deterministic effects
  6. Non-stochastic effects are _____




    C) Non-malignant skin damage & cataracts
  7. Which of the following is/are equivalent limits sufficiently low so that no threshold will be reached?
    • Deterministic
    • Non-stochastic
  8. Stochastic effects can be _____ by following ALARA and making sure no occupationally exposed individual receive more than 5 rems / year?
    • Prevented?
    • Limited?
  9. Besides the chief source of radiation exposure to the operator, which of the following can also contribute to operator exposure?
    • Leak radiation
    • Scatter from the collimator
    • Scatter from the bucky tray
    • Scatter from the x-ray table top
  10. T or F
    Operator exposure can occur for a few milliseconds after the exposure switch is released because of the effects of scatter radiation.
    False
  11. Operator exposure during fluoroscopy is _____ to the patient's exposure.




    B) Directly proportional
  12. Operator exposure during fluoroscopic examinations can best be reduced by ____
    • Standing as far as practical from the patient
    • Wearing a lead apron of preferably 0.5mm lead equivalent
  13. How frequently should fluoro ABC be checked / monitored with a designated phantom?




    C) Once a week
  14. Primary radiation includes which of the following?




    C) Useful beam
  15. At 75kVp, protective apparel of 0.25mm lead equivalent will reduce the exposure by approximately.




    A) 97%
  16. At 100 kVp, protective apparel of 0.25mm lead equivalent will reduce the exposure by approximately...
    97%
  17. T or F
    Scattered and leakage radiation are of much lower energy than that of the primary beam.
    False
  18. Why should protective apron hangers always be used?
    • Makes putting appron on much easier
    • Prevents cracking of protective lead material
    • Prevents excessive local strain on apron or apron shoulders
  19. A lead apron covers about _____ ofth active bone marrow of the body.
    80%
  20. If the operator is wearing an apron and is facing the patient, the bone marrow being exposed is contained primarily in the...
    • Skull
    • Clavicles
    • Arms
  21. An overhanging shield is considered a...
    Ceiling supported leaded glass shield
  22. Mobile screens are usually available in...
    1.0mm or 2.0mm lead equivalent
  23. Protective curtains are also referred to as...




    C) All of the above
  24. Protective curtains must be at least...
    0.25mm lead equivalent
  25. When is a thyroid shield generally used?
    When the wearer is in close proximity to the patient during fluoroscopy.
  26. Thyroid shields are available in what thicknesses?
    • 0.5 mm lead equivalent
    • 0.25 mm lead equivalent
Author
Ghoelix
ID
324490
Card Set
Fluoro Ch. 12 Rad Protection
Description
Questions and answers regarding radiation monitoring and protection during fluoro .
Updated

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