image production & eval

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Author:
dschluter5
ID:
84767
Filename:
image production & eval
Updated:
2011-05-09 13:34:29
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image production quiz
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Description:
PRI questions
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  1. Improper spetral lmatching between rare earth intensifying screens and film emulsion results in:

    A. longer scale contrast
    B. decresed recorded detail
    C. insufficient density
    d excessive density
    C. insufficient density
    (this multiple choice question has been scrambled)
  2. If a radiograph of an average size knee was perfromed usinjg automatic exposure control andall three photcells were selected, the resulting radiograph would be demonstrated:

    A. excessive density
    B. poor detail
    C. adequate exposure
    D. insufficient density
    D. insufficient density
    (this multiple choice question has been scrambled)
  3. Which of the following radiographic accessories functions to produce uniforom densities on a radiograph?

    A. penetrometer
    B. compensating filter
    C. intensifying screen
    D. grid
    B. compensating filter
    (this multiple choice question has been scrambled)
  4. which of the following would cause white artifacts on a radiograph?

    A. dirt in the cassette
    B. sharp bending of the film.
    C. handling film with damp hands
    D. abrasionof the film surface
    A. dirt in the cassette
    (this multiple choice question has been scrambled)
  5. The principal reason for using a grid is to

    A. reduce patient dose
    B. remove remnant radiation
    C. enhance differential absorption
    D. increase radiographic contrast
    D. increase radiographic contrast
    (this multiple choice question has been scrambled)
  6. a supine chest taken at 40" Sid will demonstrate:

    A. true lung size
    B. a larger heart size
    C. air and fluid levels
    D. maximum detail
    B. a larger heart size
    (this multiple choice question has been scrambled)
  7. With all factors remaining the same, beam restriction will result in _______

    A. more density
    B. less density
    C. more recorded detail
    D. less recorded detail
    B. less density
    (this multiple choice question has been scrambled)
  8. The study of the relationship between the intensity of exposure and the blackness after processing is called:

    A. optical densitometers
    B. sensitometry
    C. densitometry
    B. sensitometry
    (this multiple choice question has been scrambled)
  9. The Anode heel effect is emphasized with
    1. long SID
    2. large film size
    3. small target angle

    A. 1,2,3
    B. 2
    C. 1,2
    D. 2,3
    D. 2,3 ( with short SID)
    (this multiple choice question has been scrambled)
  10. A characteristic curve with a steep slope represents a film that is
    1. fast
    2. low contrast
    3. low latitude

    A. 2
    B. 1
    C. 1,3
    D. 3
    C. 1,3
    (this multiple choice question has been scrambled)
  11. Which of the following affects VISIBILITY of detail?

    A. SID
    B. OID
    C. focal spot size
    D. contrast
    D. contrast
    (this multiple choice question has been scrambled)
  12. Resolution in C.R. is determined by:

    A. matrix size
    B. type of phosphers
    C. brightness
    A. matrix size
    (this multiple choice question has been scrambled)
  13. Intensifying screen speed increases with increasing:

    A. phosphor thickness
    B. mAs
    C. atomic mass
    D. base thickness
    A. phosphor thickness
    (this multiple choice question has been scrambled)
  14. Lateral decentering will result in:

    A. loss of density at the periphery of film
    B. grid lines
    C. loss of density at the center of film
    D. overall loss of density
    D. overall loss of density
    (this multiple choice question has been scrambled)
  15. The number of lead stips in a grid is called:

    A. selectivity
    B. grid frequency
    C. grid ratio
    D. grid focusing
    B. grid frequency
    (this multiple choice question has been scrambled)
  16. Which of the following factors would result in a film with the lowest contrast?

    A. 10 mAs, 80 kvp
    B. 30 mAs, 60 kvp
    C. 15 mAs, 70 kvp
    D. 50 mAs, 50 kvp
    A. 10 mAs, 80 kvp
    (this multiple choice question has been scrambled)
  17. The ability to distinguish anatomic structures of similar subject contrast is _____ resoluation:

    A. object
    B. density
    C. spatial
    D. contrast
    D. contrast
    (this multiple choice question has been scrambled)
  18. Which of the following system speeds would result in the LEAST density, assuming the xposure factors remain unchanged?

    A. 300
    B. 400
    C. 100
    D. 200
    C. 100
    (this multiple choice question has been scrambled)
  19. Which of the following film characteristics involve the ability to record a wide range of densities?

    A. film gamma
    B. film latitude
    C. film contrast
    D. film speed
    B. film latitude
    (this multiple choice question has been scrambled)
  20. The shoulder of the H & D curve would have a density of approximately:

    A. .25
    B. 2.5
    C. .2
    D. 1.0
    B. 2.5
    (this multiple choice question has been scrambled)
  21. The 15% rule should be used to manipulate:

    A. distortion
    B. density
    C. contrast
    D. recorded detail
    C. contrast
    (this multiple choice question has been scrambled)
  22. What describes a radiograph lacking radiographic density?

    A. overexposed
    B. underpenetrated
    C. underexposed
    D. overpenetrated
    C. underexposed
    (this multiple choice question has been scrambled)
  23. "B" represents fillm that has a:

    a. high average gradient
    b. low average gradient
    b. low average gradient
  24. "A" has ________contrast than B.

    A. higher
    B. lower
    C. the same
    A. higher
    (this multiple choice question has been scrambled)
  25. With a variable kVp chart the kVp should be increased by _____for every cm.

    A. 2
    B. 10
    C. 30
    D. 5
    A. 2
    (this multiple choice question has been scrambled)
  26. Collimation wil _______density when using manual techniques.

    A. have no effect
    B. increase
    C. decrease
    D. improve
    C. decrease
    (this multiple choice question has been scrambled)
  27. Which of the following would NOT increase the amount of scatter radiation created?

    A. grid ratio
    B. field size
    C. patient size
    D. kVp
    A. grid ratio
    (this multiple choice question has been scrambled)
  28. The line focus principle allows a ______ focal spot with a projected ______focal spot.

    A. large: small
    B. small: large
    C. large: large
    D. small: small
    A. large: small
    (this multiple choice question has been scrambled)
  29. Which interaction in the x ray tube produces the majority of the x ray beam?

    A. photoelectric
    B. bremsstrahlung
    C. characteristic
    D. photoemission
    B. bremsstrahlung
    (this multiple choice question has been scrambled)

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