Radiography Quiz
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Questions and Answers

What is the expected image on a radiograph exposed to 70 kVp, 100 mA, 100 ms from a full wave 3 phase x-ray unit?

  • Decreased contrast and density
  • No change in contrast and density
  • Blurred image
  • Increased contrast and density (correct)
  • Which of the following will serve to increase effective energy of the x-ray beam?

  • Increase in mA
  • Decrease in exposure time
  • Increase in kV (correct)
  • Increase in added filtration
  • What is indicated by visualizing 8 dots (dashes) on a finished film during a spinning top test at 200 mA, 0.05 s, and 70 kVp?

  • Overexposure due to incorrect exposures
  • The kVp setting is inaccurate
  • Underexposure due to incorrect exposures
  • The 0.5 sec time station is inaccurate (correct)
  • When comparing the mR output at 50 mA @ 0.2 s, 100 mA @ 0.1 s, and 200 mA @ 0.05 s while increasing the mAs using different mA and time combinations, this is part of which QC test?

    <p>Linearity</p> Signup and view all the answers

    In which portion of the x-ray circuit is a step-down transformer located?

    <p>Filament Circuit</p> Signup and view all the answers

    If a high-voltage transformer has 100 primary turns and 35,000 secondary turns, and is supplied by 220 V and 75 A, what is the voltage across the secondary coil?

    <p>7700 V</p> Signup and view all the answers

    Which of the following will serve to increase the effective energy of the x-ray beam?

    <p>Increase in kV</p> Signup and view all the answers

    What is indicated by visualizing 8 dots (dashes) on a finished film during a spinning top test at 200 mA, 0.05 s, and 70 kVp?

    <p>The 0.5 sec time station is inaccurate</p> Signup and view all the answers

    When comparing the mR output at 50 mA @ 0.2 s, 100 mA @ 0.1 s, and 200 mA @ 0.05 s while increasing the mAs using different mA and combination, this is part of which QC test?

    <p>Linearity</p> Signup and view all the answers

    In which portion of the x-ray circuit is a step-down transformer located?

    <p>Filament Circuit</p> Signup and view all the answers

    What will serve to increase the effective energy of the x-ray beam?

    <p>Increase in added filtration</p> Signup and view all the answers

    If a high-voltage transformer has 100 primary turns and 35,000 secondary turns, and is supplied by 220 V and 75 A, what is the secondary voltage?

    <p>7700 V</p> Signup and view all the answers

    Study Notes

    Radiograph Image Characteristics

    • A radiograph exposed to 70 kVp, 100 mA, 100 ms from a full wave 3 phase x-ray unit is expected to have a certain image appearance.

    X-ray Beam Energy

    • Increasing the kVp will serve to increase the effective energy of the x-ray beam.
    • Other factors that can increase the effective energy of the x-ray beam will also be explored.

    Spinning Top Test

    • Visualizing 8 dots (dashes) on a finished film during a spinning top test at 200 mA, 0.05 s, and 70 kVp indicates a specific outcome.

    Quality Control (QC) Tests

    • Comparing the mR output at 50 mA @ 0.2 s, 100 mA @ 0.1 s, and 200 mA @ 0.05 s while increasing the mAs using different mA and time combinations is part of a QC test.

    X-ray Circuit Components

    • A step-down transformer is located in the x-ray circuit.

    Transformer Calculations

    • If a high-voltage transformer has 100 primary turns and 35,000 secondary turns, and is supplied by 220 V and 75 A, the voltage across the secondary coil is 15,750 V.

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    Description

    Test your knowledge of radiography with this quiz covering topics such as x-ray unit settings, image production, and factors affecting the effective energy of the x-ray beam.

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