density

Card Set Information

Author:
Snoop
ID:
9611
Filename:
density
Updated:
2010-03-08 10:53:13
Tags:
Denstiy contrast grid
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Description:
review
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  1. What is the controlling factor for density?
    mAs
  2. Which law states that density should remain the same with any combination of mA and time as long as your mAs is the same?
    Law of reciprocity
  3. What percentage of change in mA will be needed to have a visible difference in density
    30%
  4. T or F A 5% increase in KvP will cause a visible difference in density
    30%
  5. SID and beam intensity have a _________ relationship
    Inverse
  6. Film density will ____________as filtration is increased
    Decrease
  7. T or F Grids have no Effect on density
    False
  8. As tissue thickness and type increase density will
    Decrease
  9. Will increasing collimation increase or decrease the total number of x-ray photons hitting the IR?
    Decrease
  10. A grid is used to improve contrast by__________
    Absorbing Scatter
  11. Scatter increases and contrast is impaired as KvP
    Increase
  12. T or F Scatter decrease with increasing volume of tissue being radiated and decreases with increased atomic number of the tissue.
    First part false it increases, second part true
  13. T or F a 12:1 gird ratio will absorb more scatter than an 8:1
    True
  14. ________ grids are commonly used because they allow tube angulations.
    Linear
  15. T or F A focused grid with lower grid ratios has a greater latitude than higher grid ratios
    True

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