radiology

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Author:
charleydawn
ID:
279075
Filename:
radiology
Updated:
2014-07-16 19:27:46
Tags:
protection
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Description:
Rad. protection test 2
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  1. ______ is most radio resistant.
    Muscle cells
  2. The cytoplasm consist primarily of
    water
  3. How does the energy of a scattered photon compare with that of the incident photon?
    Less
  4. What is the single largest source of natural background radiation?
    Radon
  5. To what height must in-wall secondary protective barriers extend?
    To the ceiling
  6. Thernoluminescent dodimeters use what type of crystals to record use?
    Lithium Fluoride
  7. As low-energy x-rays are removed from the beam, it becomes
    harder
  8. What is the thickness of a lead apron that should be worn while being exposed to radiation?
    .50 mm lead equivalent
  9. The radiation dose that, if received by the entire population, would cause the same genetic injury as the total of doses received by the member actually being exposed is called
    Genetically significant dose
  10. samller bodies within the cytoplasms are called
    organelles
  11. For optimal radiation protection, what type of film-screen system should be used?
    Fast
  12. The traditional unit of dose equivalency is the
    REM
  13. What is the annual effective absorbed dose equivalent limit for the general public(frequent exposure)?
    .1 rem
  14. Thermoluminescent dosimeters are heated and release what tyoe of energy to indicate dose.
    Visible Dose
  15. What percent of human exposure is background radiation?
    82%
  16. The photon-tissue interaction that results from very low energy x rays is
    coherent
  17. The photon tissue interaction that occurs when an outer shell electron is struck by an incident photon is
    compton
  18. what is stochastic effect?
    Increased dose equals increased probability of effects
  19. How is damage to the cell being radiated described?
    Somatic
  20. The greatest source of artificial exposure is from?
    Diagnostic imaging procedures
  21. When using a grid, radiation dose
    increases
  22. A filter is placed in the xray beam to remove
    long wavelengths rays
  23. The annual effective absorbed dose equivalent limit for the general public, assuming infrequency exposure is
    .5 rem
  24. Genetic effects follow what type of dose-response curve?
    Linear-nonthreshold
  25. Scattered photons emerging from the patient travel in what kind of paths?
    Divergent
  26. Free radicals may recombine to form
    hydrogen peroxide
  27. examples of low-linear transfer (LET) radiations include
    x-rays
  28. How dose the energy of a scattered photon compare with that of the incident photon?
    Less
  29. Germ cell division is called
    Meiosis
  30. Most damage from exposure to radiation occur as a result of
    Indirect effect
  31. Film badges are changed
    monthly
  32. The traditional unit of absorbed dose is the
    Rad
  33. How often is filtration adjusted by the radiographer
    Never
  34. Medical and dental x-rays are examples of
    human produced radiation
  35. How may cell damage manifest?
    Both as loss of function and as abnormal function
  36. What describes increased dose equaling increased probability of effects?
    Sochastic effects
  37. The process of somatic cell division called
    mitosis
  38. The photon-tissue interaction that produces scatter that exits the patient is
    compton
  39. The secondary protective barrier must overlap the primary protective barrier by at least
    1/2 inch
  40. What occurs when radiation transfers its energy to DNA
    Direct effect
  41. The SI unit for the REM is the
    Sievert
  42. Paitent dose is recorded in
    RAD
  43. Differential absorption is a result of which photon tissue interaction
    Photoelectric
  44. An area called that is used primarily by persons trained in radiation safety and wearing personnel monitoring devices?
    Controlled area
  45. The photon tissue interaction that does not occur in the diagnostic imaging is
    Pair production
  46. The law of Bergonie and Tribondeau
    Immature, undifferentiated and rapidly diving cells
  47. The unit of radiation tht takes into account the different biological effects caused by different types of radiation is the
    REM
  48. What occurs when radiation transfers its energy to the cytoplasm
    indirect effect
  49. for optimal radiation protection, what technique should be used?
    High kvp low mas
  50. Personal dosimetry report reads in _____ units
    Rem or mrem
  51. Which photon tissue interaction is responsible for producing radiographic contrast?
    photoelectric
  52. Walls that may be struck by scatter or leakage radiation require
    secondary protective barriers
  53. The photon-tissue interaction that results in absortion of all the energy of the incident photon is
    photoelectric
  54. The dose-response relationship starting no level of radiation can be considered completely safe and that the degree of response if directly proportional to the amount of radiation received in
    Linear nonthreshold
  55. The photon tissue interaction that occurs when an incident photon strikes a k-shell electron is
    photoelectri

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