RAD-172 (DENS/IR CONTRAST. REC. DETAIL)INCREASE OR DECREASE REVIEW

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anatomy12
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266504
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RAD-172 (DENS/IR CONTRAST. REC. DETAIL)INCREASE OR DECREASE REVIEW
Updated:
2014-05-05 08:25:02
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xray
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xray
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  1. which of the tech factors will produce a darker radiograph (increased density)or an increased exposure to IR
    10 mAs 60kv
    10mAs 70kv
    • 10mAs 70kv
    • More scatter, more photons, more penetration
  2. increasing kvp will ____ the radiographic density/IR exposure
    • increase
    • More penetration, more scattered photons hitting the IR
  3. decreasing mAs will ___ the radiographic density/IR exposure
    • decrease
    • Less photons created and hitting the IR
  4. increasing the thickness of the body part will _____ radiographic density/IR exposure
    • decrease
    • Less photons will make it through the patient to expose IR
  5. increasing sid from 40-80 will ____ radiographic density
    • D
    • Less radiation hits the IR (Inverse Square)
  6. decreasing the grid ratio will ___ the radiographic density/Ir exposure
    increase
  7. 7.    Increasing processor temperature will ________the radiographic film density.
    • increase
    • Reducing agents over-react and turn all crystals into black metallic silver
  8. 6.    Decreasing the grid ratio will ____________the radiographic density/IR exposure.
    • increase
    • Less photons get absorbed in lead strips and more scatter gets through
  9. 6.    Decreasing the amount of filtration will ___________ the radiographic density/IR exposure.
    I
  10. 6.    Increasing collimation will ______________the radiographic density/IR exposure.
    • D
    • less tissue is irradiated so less scatter is created
  11. Increasing the speed of the intensifying screens will _________the radiographic film density.
    • I
    • faster screens expose IR to more light photons
  12. 7.    Decreasing kVp will ______________the radiographic density/IR exposure.
    D
  13. 7.    Increasing the mAs 15% will _____________visible radiographic film density.
    • no change
    • mAs must be changed 30% to see a visible density difference on film
  14. 7.    When the anode heel effect is apparent, what side of the IR can appear more exposed?
    cathode more photons hit the cathode side due to absorption of the beam in the heel of the anode
  15. 9.    Increasing kVp will ________________the amount of photoelectric absorption interactions occurring.
    D
  16. 9.    Decreasing the kVp will _____________contrast.
    I
  17. 9.    Decreasing the mAs 30% will ____________contrast.
    not affect
  18. 9.    Increasing filtration will __________contrast.
    D
  19. 9.    Increasing collimation will _______________ contrast.
    I
  20. 9.    Decreasing the thickness of the body part will _____________ contrast.
    I
  21. 9.    Increasing grid ratio will ______________contrast.
    I
  22. 9.    Increasing kvp and IS screens will _______ contrast.
    • I
    • H&D curve shows films with increased speed generally have higher contrast
  23. 9.    Decreasing processing temperature will _______contrast.
    • D
    • any change that does not provide optimal processing conditions will decrease film contrast
  24. 9.    Increasing OID will _________________ contrast.
    • I
    • Allows scatter to angle away from the film due to air-gap
  25. 9.    Increasing the processing time (immersion time) will _______contrast.
    D
  26. 9.    Angling the x-ray beam through a body part while maintaining the same SID will __________ contrast.
    D
  27. 9.    Poor film screen contact will cause recorded detail to _____.
    • D
    • light diffusion causes loss of detail
  28. 9.    Increasing the size of the focal spot will __________recorded detail.
    D
  29. 9.    Decreasing SID will ___________recorded detail.
    • D
    • more angled photons will expose film causing geometric unsharpness
  30. 9.    Increasing OID will ____________recorded detail.
    • D
    • More magnification will increase geometric unsharpness and decrease detail
  31. 9.    Increasing film/screen speed will ___________ recorded detail.
    • D
    • Smaller crystals/thinner layer provide better recorded detail
  32. 9.    Motion will ___________ recorded detail.
    D
  33. 9.    Increasing film processing temperature will ______ recorded detail.
    not affect
  34. 9.    Using compression will _______recorded detail.
    • I
    • reduces the possibility of motion
  35. 9.    Increasing SID will ___________ recorded detail.
    I
  36. 9.    Going from a .5 mm to a 1.25 mm focal spot size will ______recorded detail.
    D
  37. 9.    Decreasing the crystal/phosphor size will _____ recorded detail.
    • I
    • Smaller crystal size or phosphor size = better detail
  38. increasing SID will ___ size distortion
    decreases
  39. increasing OFD will ___ size distortion
    increase
  40. improper cr alignment will ___ shape distortion
    increase
  41. decreasing ofd will ___ shape distortion
    not affect

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