RAD-139 CH.4 RADIATION QUANTITIES AND UNITS

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Author:
anatomy12
ID:
260758
Filename:
RAD-139 CH.4 RADIATION QUANTITIES AND UNITS
Updated:
2014-02-19 20:25:10
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xray
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xray
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  1. what is the unit of measurement of exposure to x and gamma radiation
    roentgen
  2. Fuoroscopic entrance exposure rates are measured in
    roentgen
  3. Equivalent dose is measure in ____
    rem = radiation equivalent man
  4. absorbed dose is measured in ___
    Rad or Gy
  5. what is the measurement of exposure in air
    roentgen or also known as exposure
  6. what are exposure factors
    kvp and mas
  7. what is the result of of the interaction that occurs between the radiation and neutral atoms in the air
    some electrons being liberated from those air atoms = ionization
  8. what device is used to measure exposure or radiation in air
    ionization chamber
  9. what is a result of ionization
    can cause somatic damage because the atom is now unstable
  10. what is absorbed dose (definition)
    the amount of energy per unit mass absorbed by an irradiated object
  11. what energy is responsible for any biological damage resulting from the exposure
    absorbed
  12. how do we reduce abosrbed dose to the patient
    increase kvp and decrease mas
  13. what three factors is the amount of absorption dependent on  
    • atomic # of tissue composing the structure
    • mass density of the tissue
    • energy of the incident photon
  14. what the three things increase absorption increases
    • atomic # increases
    • mass density increases
    • photon energy decreases

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