Radiograph Quality Review Guide

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Author:
heather.dundas
ID:
221636
Filename:
Radiograph Quality Review Guide
Updated:
2013-05-29 23:03:46
Tags:
VTI
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VTI
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  1. The difference in density and mass of two adjacent anatomic structures
    subject contrast
  2. The measurable/visible difference between two radiographic densities
    contrast
  3. The relation of the haight of the lead strips to the distance between them
    grid ratio
  4. Non-image forming radiation that is scattered in all directions because of onjects in the path of the primary beam
    scatter radiation
  5. X-rays turn the radiograph what color?
    black
  6. 5 factors that can affect radiographic density: M,K,D,T,P
    • mass
    • kVp
    • developing time
    • temp
    • patient thickness
  7. Loss of detail due to geometric distortion
    geometric unsharpness
  8. 3 examples of geometric distortion: E,F,M
    • elongation
    • foreshortening
    • magnification
  9. What metal do grids contain that allows them to absorb scatter radiation?
    lead
  10. If a dog is being radiographed for hip dysplasia, what will occur if the femurs are not parallel to the film?
    foreshortening
  11. The higher the grid ratio the more _ is absorbed?
    scatter
  12. When _ occurs the image appears lighter, with distinct white lines over the underexposed areas of the film.
    grid cut off
  13. What is the primary exposure factor that controls scatter radiation?
    kVp
  14. What anatomic areas are best viewed using short scale?
    bone
  15. What anatomic areas are best viewed using long scale?
    tissue
  16. What is the primary exposure factor that affects density?
    mAs
  17. What is the primary exposure facotr that affects contrast?
    kVp
  18. In terms of subject contrast, what structure is considered the densest?
    bone
  19. In terms of subject contrast, what structure is considered the least dense?
    gas
  20. What is the color of soft tissue on a radiograph?
    grey
  21. What is the color of bone on a radiograph
    white
  22. What is the color of gas/fluid/air on a radiograph?
    black
  23. What is the color of lead on a radigraph?
    clear
  24. What is the color of any other metal on a radiograph?
    white
  25. When viewing a radiograph that appears to be over penetrated. what exposure factor will you adjust?
    kVp
  26. How much should the kVp be dec?
    10-15%
  27. If you radiograph an animal that is severely anorexic, what eposure factor should be adjusted?
    kVp dec by 10-15%
  28. What is thickness of the lead strips in a grid?
    0.5mm
  29. Linear grid is what?
    parallel
  30. Crisscrossed grid is what?
    checkered
  31. Where is the Potter-Bucky diaphragm normally found on an x-ray table?
    under table
  32. What is used to describe image sharpness, clarity, distinctness, and perceptibility?
    radiographic detail
  33. high contrast=_scale
    short
  34. low contrast=_scale
    long
  35. A radiograph with an inc number of grey tones exhibits _ scale of contrast.
    long
  36. A radiograph that is mainly black and whites (few shades of grey) exhibits _ scale of contrast.
    short
  37. If a radiograph appears to be overexposed, has an overall black appearance, but the contrast is not affected, what exposure factor will you adjust for the re-take? How much dec?
    mAs dec by 30-50%

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