JENNIFER HODGES

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JenniferHodges
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84890
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JENNIFER HODGES
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2011-05-09 21:06:50
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JENNIFER HODGES
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  1. What is the most insensitive?
    CNS
  2. What is the increase in brightness by acceleration of the electron in the image intensifier?
    • Flux Gain
    • Flux=Movement
  3. What is the relationship between mAs and Density?
    Reciprocity Law
  4. What are the grid conversion factors?
    • 5:1=3
    • 8:1=4
    • 12:1=5
    • 16:1=6
  5. What interaction does not cause ionization?
    Coherent
  6. What does increasing the filtration do to contrast?
    Deacreases Contrast
  7. The smaller the Intensifying Phosphors the?
    Better the recorded detail
  8. What bone has no body?
    Atlas?
  9. What converts x-ray energy into light?
    Input Phosphor
  10. How often are crossover racks cleaned?
    Twice daily
  11. What is X-Ray tube current measured in?
    Milliamps
  12. What chemical slows oxidation?
    Preservatives
  13. How do you figure the Heat Unit (HU) for single phase equipment?
    mAs*kVp
  14. How do you figure the Heat Unit (HU) for triple phase six pulse?
    mAs*kVp*1.35
  15. How do you figure the Heat Unit (HU) for triple phase 12 pulse?
    mAs*kVp*1.41
  16. What voltage ripple does a single phase have?
    100%
  17. What voltage ripple does a triple phase six pulse have?
    13%
  18. What voltage ripple does a triple phase twelve pulse have?
    4%
  19. What voltage ripple does a high frequency generator have?
    1%
  20. Where is high contrast films plotted?
    On the left
  21. What interaction results in differential absorption?
    Photoelectric effect
  22. When is exposure lattitude the narrowest?
    At lower kVp levels
  23. What photon tissue interaction that produces scatter and leaves the patient?
    Compton
  24. WHat is the factor that is expressed as the ratio of primary radiation through the rid to secondary radiation transmitted through the grid?
    Grid Selectivity
  25. How sensitive is the OSL monitor?
    1mrem
  26. How sensitive is the TLD monitor?
    5mrem
  27. What is a compound smallest unit?
    Molecule
  28. As kVp increases a greatest potential difference exsist between what?
    Anode and Cathode
  29. What part of the stomach is most proximal?
    Cardia
  30. How do trough filters work?
    Thinner at Center and Thicker at Edges
  31. What do x-ray photons not have?
    • Charge
    • Mass
  32. What is plotted on the y-axis of the H&D curve?
    Density
  33. What is plotted on the X-Axis of the H&D curve?
    Exposure
  34. What interaction occurs when an incident photon strikes a k-shell electron?
    Photoelectric
  35. What happens when a patient takes a deep breath?
    The diaphragm contracts and the dome moves down
  36. What is the grid error with density deacreased across the entire film?
    Off-level grid
  37. What is the grid error tgat shows normal density in the middle but decreased density on the sides?
    Upside down grid
  38. What is the purpose of the sensitivity specks?
    Serves as cneters for making the visible image
  39. What is not an organelle?
    Nucleus
  40. What is the annula effective dose for natural background radiation?
    295mrem
  41. What is the symbol for the atomic mass?
    A
  42. What is the dose at tabletop for fluoro?
    10R/Minute
  43. What interaction results from very low energy?
    Coherent
  44. What happens as filtration increases?
    Contrast Decreases
  45. What abdominal structure is not an accessory digestive organ?
    Spleen(Part of the Lymphatic System)
  46. What is the relationship between kVp and Density?
    Direct but not proportional
  47. What are the lower risk levels for embryo-fetus?
    15-20Rad
  48. What is the Example of low LET?
    X-rays
  49. what is an example High LET?
    Alpha, Neutrons, and radioactive Fallout
  50. What does slower film screen speed do?
    Increases definition
  51. What does faster speed screen do?
    Decrease Sharpness
  52. What do slower film screen speed demonstrate?
    Higher Patient dose
  53. What organ is responsible for radiation induced leukemia?
    Bone Marrow
  54. Where is the CR for lateral projection of the sinuses?
    0.5-1.0 posterior to outer canthus
  55. What is the unit of radiation that takes into account different biologic effects caused by different types of radiation?
    REM
  56. Where is the pylorus located?
    Narrow Distal end that connects with the small intestine (G)

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