Kats test

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Author:
MYKE
ID:
247411
Filename:
Kats test
Updated:
2013-11-17 20:58:40
Tags:
monday
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Description:
Mod 3
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  1. 4 EXPOSURE FACTORS
    • kVp,
    • mA,
    • exposure time,
    • and  (SID).
  2. List the four patient factors and explain their effects on radiographic technique.
    • Composition
    • Thickness
    • Pathology
  3. Identify four image-quality factors
    • OD,
    • contrast,
    • image detail,
    • and distortion
  4. Optical density is 
    he degree of blackening of the finished radiograph
  5. Optical density can be controlled in radiography by two major factors:
    mAs and SID
  6. Detail describes the
    sharpness of appearance of small structures on the radiograph
  7. radiographic density is
    The amount of overall blackening of a radiographic image
  8. When a film is exposed, _____ halide crystals are converted to ____ metallic silver.
    • Silver
    • Black
  9. The  latent  image is the _____ Image on ______ film, consisting of ______ ions from the interaction with x-rays
    • (invisible)
    • exposed 
    • silver
  10. A radiograph that appears too dark is said to be overexposed
    overexposed
  11. Densitometer
    : An instrument that measures film blackness
  12. Which imaging system has a linear exposure relationship
    Film/Screen
    Digital
    or Both
    Digital
  13. Focal track  :
    The area of the anode where x-ray photons are produced by bombardment of electrons from the cathode
  14. fat
    muscle
    water
    bone
    bone
  15. which one has the lowest Atomic #
    fats 
    water
    muscle
    bone
    fats
  16. Photoelectric effect  absorbed or scattered
    absorbed
  17. compton effect absorbed or scattered
    scattered
  18. Fat has the ______  water content
    Lowest
  19. The primary problem with fat in terms of radiographic contrast is the _____ effect, not the tissue density, atomic number, or its ability to produce scatter. 
    layering
  20. Muscle also has the____water content of the tissue groups.
     highest 
  21. Grids act to _____contrast (higher contrast) by removing _____ before it exposes the image receptor. 
    • increase 
    • scatter radiation
  22. (OID) or  (SID) does have an effect on contrast
    OID
  23. There are two categories of contrast media to consider:
    • negative contrast media
    • positive contrast media,
  24. negative contrast media is usually
    (usually air) 
  25. Scatter radiation has what effect on contrast
    increases
    decreases
    no effect
    Decreases 
  26. a increase i developer time will have what effect on contrast
    increase
    decrease
    none
    decrease 
  27. Collimation will have what effect on contrast
    increase
    decrease
    none
    increase

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