Chapter 13

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Author:
MYKE
ID:
243442
Filename:
Chapter 13
Updated:
2013-10-28 16:06:10
Tags:
10 28 13
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Description:
Kats Class
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  1. “acceptance of a range of exposure factors to produce an acceptable image
    Dynamic range
  2. Patient factors
    •  Anatomic thickness
    •  Body composition
  3. Image-quality factors
    •  Optical density (OD)
    •  Contrast
    •  Detail
    •  Distortion
  4. Exposure-technique factors
    •  Kilovolt peak (kVp)
    •  Milliamperage
    •  Exposure time
    •  SID
    •  Grids
    •  Screens
    •  Focal-spot size
    •  Filtration
  5. Harder to penetrate then normal
     More radiopaque
  6. Easier to penetrate then normal
     More radiolucent
  7. low density =________ Brightness
    High Brightness
  8. High density =________ Brightness
    Low Brightness
  9. Tissue density
     Mass density of body part or atomic number
  10. Radiographic density
     Photographic property
  11. MAs is the controlling factor for_____
    Density
  12. Change from 200 mA to 300 mA =______% increace
    50%
  13. MAs/Quantity of exposure is directly proportional to ________
    exposure time
  14. Tissue density  Increased tissue density—as in bone, for example—causes a lighter area on the radiograph because it absorbs more of the primary radiation, leaving less exposure on the IR.
  15. Radiographic density  Increased radiographic density means that the image is darker … In other words, radiographic density and tissue density are inversely related to each other.
  16. Image with excessive brightness
    or insufficient density
  17. Image with insufficient brightness
    or excessive density
  18. When film images (made with manual technique settings) are underexposed or overexposed, a general rule states that a minimum change in mAs of 25% to 30% is required to make a visible difference in radiographic density on the repeat radiograph.”

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