Image Acquisition & Evaluation ( Density)

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Mariyah
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306133
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Image Acquisition & Evaluation ( Density)
Updated:
2015-08-07 00:51:52
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Mariyah
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Density
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  1. _______ resolution refers to the ability to image small objects that have high subject contrast,
    Spatial
  2. _____ __resolution is the ability to distinguish anatomical structures of similar subject contrast such as liver–spleen
    Contrast
  3. What Controls the # of Electrons Passing from Cathode to the Anode in the X-Ray Tube?
    mAs
  4. What Controls The Quantity of X-Rays Produced at The Cathode
    mAS
  5. The ____ Controls The Amount of Radiation Exiting The X-Ray Tube
    mAs
  6. The _____ Directly Controls The # of X-Ray Photons That Emerge From the Patient as Exit X-Rays
    mAs
  7. _____ is Governed by the reciprocityl Law
    mAs
  8. ____ Directly Controls the energy or quality of the X-Rays produced
    kVp
  9. An increase in kVp Dose what to the wave-Leangth
    Shortens
  10. What effects Density but not in a directly proportional relationship
    kVp
  11. As kVp Increases Density_____
    Increases
  12. As kVp Decreases density _____
    Decreases
  13. What Factor is governed by the 15% rule
    kVp
  14. An increase of_____  of 15% doubles the density
    kVp
  15. As kVp increases the wavelength ______ an x-rays become (More or Less) Penetrating?
    • shortens 
    • More
  16. express the inverse square law in writing
    Old intensity over New Intensity = New Distance* over Old Distance*
  17. If SID is Doubled the intensity of the beam dose what
    Decreases 4 time
  18. Write the density Maintenance Formula
    Old mAs over New mAs = Old Distance* over New Distance*
  19. If SID is doubled what has to be done to maintain density
    Increase mAs 4x
  20. what happens to density when grids are used
    decreased density unless mAs is increased
  21. What effect does Beam restriction have on Density
    Decreases density by limiting the size of the X-Ray beam...Unless mAs is increased
  22. Which end of the X-Ray Tube is density the greatest
    Cathode ( Anode Heel Effect )
  23. Thicker anatomy should be placed under which end of the X-Ray Tube
    Cathode  ( Anode Heel Effect )
  24. What effect does Filtration Have on density
    Insignificant
  25. How does SID effect Dencity
    Inverse Square Law

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