RAD190-ch7.txt

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Author:
emerick9102
ID:
18008
Filename:
RAD190-ch7.txt
Updated:
2010-05-05 20:03:29
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radiography RADexam1 ch7
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chapter 7 review
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  1. Inversely related to image density and beam intensity.
    A. mA
    B. Time
    C. kVp
    D. SID
    d
  2. Together determine the total quantity of radiation produced.
    A. mA
    B. Time
    C. kVp
    D. SID
    a & b
  3. Has a directly proportional relationship to image density.
    A. mA
    B. Time
    C. kVp
    D. SID
    a & b
  4. Increase by 15% will approximately double image density.
    A. mA
    B. Time
    C. kVp
    D. SID
    c
  5. Decreasing this factor decreases the penetrating ability of the x-ray beam.
    A. mA
    B. Time
    C. kVp
    D. SID
    c
  6. Primary factor used to control image contrast
    A. mA
    B. Time
    C. kVp
    D. SID
    c
  7. Increasing this factor results in lower patient dose.
    A. mA
    B. Time
    C. kVp
    D. SID
    d
  8. Usually, this factor is standardized and does not vary from patient to patient.
    A. mA
    B. Time
    C. kVp
    D. SID
    d
  9. Reducing this factor minimizes the effect of patient motion causing blur on the image.
    A. mA
    B. Time
    C. kVp
    D. SID
    b
  10. Doubling this factor results in doubling radiographic density.
    A. mA
    B. Time
    C. kVp
    D. SID
    a & b
  11. Doubling this factor results in ¼ radiographic density.
    A. mA
    B. Time
    C. kVp
    D. SID
    d
  12. difference in density between adjacent areas of the image
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    b
  13. overall blackness of the radiograph
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    a
  14. misrepresentation of the true shape of the object
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    e
  15. image clarity or the ability to visualize small structures
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    c
  16. Primarily controlled by kVp.
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    b
  17. Primarily controlled by mAs.
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    a
  18. Decreased by increasing SID.
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    a & d
  19. Increased by increasing SID.
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    c
  20. Increased by angulation of the body part
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    e
  21. Increased by angulation of the Central Ray
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    e
  22. Decreased by using larger focal spot size
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    c
  23. Decreased by increased patient motion
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    c
  24. Increased by increased OID.
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    d
  25. Decreased by increased screen crystal size.
    A. density
    B. contrast
    C. detail
    D. size distortion (magnification)
    E. shape distortion
    c
  26. T or F?
    Increased OID results in increased penumbra and decreased image clarity.
    true
  27. T or F?
    The geometric factors that affect image detail are OID, SID, and focal spot size.
    true
  28. T or F?
    In general, faster speed screens have larger phosphor crystals resulting in increased radiographic detail or image sharpness.
    FALSE - decreased detail
  29. T or F?
    The Half Value Layer is an indication of beam quantity.
    FALSE- beam quality
  30. T or F?
    The effect of added filtration is to decrease the amount of low energy radiation reaching the patient.
    true
  31. T or F?
    The inherent blurriness at the edges of objects represented in the image is termed penumbra.
    true
  32. T or F?
    Low mAs settings used with high speed intensifying screens can result in radiographic image mottle.
    true
  33. Which mA and time combination produces the greatest number of x-rays?
    a) 200 mA and 0.1 seconds
    b) 200 mA and 0.2 seconds
    c) 100 mA and 0.3 seconds
    d) 100 mA and 0.5 seconds
    d
  34. If the radiation intensity at 30² is 10 mR, what will the intensity be at 60²?
    a) 40 mR
    b) 20 mR
    c) 5 mR
    d) 2.5 mR
    d

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