radiology 1

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Author:
Anonymous
ID:
70096
Filename:
radiology 1
Updated:
2011-03-02 00:24:19
Tags:
radiology
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Description:
radiation safety, xray production, exposure factor, film processing, radiographic quality, film evaluation
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  1. tungest filament is located in the anode

    a. true
    b. false
    b. false

    cathode does
  2. any body part exceeding this measurement requires the use of a grid to reduce scatter.

    A. 2.5cm
    B. 20cm
    C. 30cm
    D. 10cm
    D. 10cm
    (this multiple choice question has been scrambled)
  3. the focal spot originates from the:

    A. tungsten filament
    B. focusing cup
    C. tungsten target
    D. beryllium window
    C. tungsten target
    (this multiple choice question has been scrambled)
  4. a low out output xray machine utilizes a stationary anode

    a. true
    b. false
    b. false
  5. during the developing process metallic silver is converted to silver halide crystals

    a. true
    b. false
    b. false
  6. radiographic ___ is the degree of blackness on a finished radiograph

    a. density
    b. contrast
    a. density
  7. a ___ scale of contrast generally produces a more diagnostic radiograph

    a. long
    b. short
    a. long
  8. the ___is most responsible for the quanity of xray produced and radiographic density, vs ___ is most responsible for the quality of the xray beam and the radiographic scale of contrast

    a. kVp;mAs
    b. mAs;kVp
    b. mAs;kVp
  9. the higher the grid ratio the moe effective the grid is at absorbing scatter

    a. true
    b. false
    a. true
  10. elctrons travel:

    A. toward the cathode in the xray tube
    B. away from the anode in the xray tube
    C. toward the anode in the xray tube
    d. none of the above
    C. toward the anode in the xray tube
    (this multiple choice question has been scrambled)
  11. all of the following are types of somatic damage caused by radiation except

    A. cataracts
    B. sterility
    C. gene mutation
    d. all of the above
    C. gene mutation
    (this multiple choice question has been scrambled)
  12. what is the maximum permissible dose of radiation that a person can receive according to state and federal regulation

    A. 100 rem/year
    B. 0.5 sv/year
    C. 0.05 sv/year
    D. 0.005 sv/year
    C. 0.05 sv/year
    (this multiple choice question has been scrambled)
  13. if the cassette is not directly under the primary beam, how will the film look like?

    A. the exposed portion will be distorted
    B. the part of the film not directly under the primary beam is white or unexposed
    C. the part of the film not under the primary beam is balck or unexposed
    D. the exposed image will lookas if two identical objects are exposed
    B. the part of the film not directly under the primary beam is white or unexposed
    (this multiple choice question has been scrambled)
  14. the temperature of the filament is controlled by:

    A. kVp setting
    B. mA setting
    C. source image distance
    D. time setting
    B. mA setting
    (this multiple choice question has been scrambled)
  15. an underexposed film appears___; to correct this___

    A. too light; decrease kvp or ma
    B. too dark; decrease kvp or ma
    C. too light; increase kvp or ma
    D. too dark; increase kvp or ma
    C. too light; increase kvp or ma
    (this multiple choice question has been scrambled)
  16. how does kvp affect scatter radiation?

    A. kvp has no effect on scatter radiation
    B. as kvp increase, scatter radiation can increase
    C. as kvp decreases, scatter radiation can increase
    D. as kvp increase, scatter radiatin decreases
    B. as kvp increase, scatter radiation can increase
    (this multiple choice question has been scrambled)
  17. you hae determined that the penetration is inadequate for a particular abdominal film and the film has an overall white apperance. what should you do next?

    A. increase kvp by 10-15%
    B. increase kvp by 30-50%
    C. increase mas by 30-50%
    D. increase mas by 10-15%
    A. increase kvp by 10-15%
    (this multiple choice question has been scrambled)
  18. all of the following are necessary for xray production except

    a. an obstacle free path for the electrons to travel
    b. a method of accelerating the electrons
    c. a vaccum enviroment so the xray dont collide with anything
    d. all of the above
    d. all of the above
  19. which of the following ways to decrease your exposure to radiation

    a. look away from the primary beam when exposing the radiograph
    b. wear your personal protective equipment
    c. stand upright, dont lean over the table
    d. all of the above
    d. all of the above
  20. all of the following could cause a radiograph to be too dark except

    A. too much time in the developer
    B. xray tube failure
    C. over measurement of the part under examination
    D. too much kvp
    B. xray tube failure
    (this multiple choice question has been scrambled)
  21. the most common cause for a radiograph turning yellow is the devloper not being completely washed off before going into the fixer

    a. true
    b. false
    b. false
  22. used to measure the thickness of the area to be xrayed
    cailper
  23. list the five subject densities from lowest density to highest density
    • 1. gas--jet black
    • 2. fat
    • 3. water
    • 4. bone
    • 5. metal--bright white
  24. is a non image forming radiation that moves in all directions and results from xrays bouncing off the objects
    scatter radiation
  25. is disortion of anatomic structures so that the image appears longer than actual size due to the xray beam not being directed perpendicular to the film
    elongation
  26. is distortion of anatomic structures so that the image appears longer than the actual size due to the xray beam not being directed perpendicular to the film surface
    foreshortening
  27. is distortion of anatomic structures when the image appears larger than normal
    magnification
  28. the ___ refers to a decrease of xray intensity on the anode side of the xray beam caused by the anode target angle
    heel effect
  29. are devices used to monitor our exposure to radiation
    dosimeter
  30. refers to the distance between the source of xray and the image receptors or film
    source image distance
  31. the cathode has a ___ charge
    the anoe has a ___ charge
    • negative
    • postive

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