Radiological Medical Devices: Grid Construction and Types
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Questions and Answers

What is the typical range for the height of lead strips in a grid?

  • 8 mm to 10 mm
  • 5 mm to 8 mm
  • 1 mm to 2 mm
  • 2 mm to 5 mm (correct)

    • What is the grid ratio defined as?

  • The ratio of the height to the width of the spacer (correct)
  • The ratio of the lead strip thickness to the interspace width
  • The ratio of grid frequency to grid lines
  • The ratio of grid height to grid width

    • What is the range for grid frequency in low frequency grids?

  • 30-40 lines/cm (75-100 lines/inch)
  • 60-70 lines/cm (150-175 lines/inch)
  • 50-60 lines/cm (120-150 lines/inch)
  • 40-50 lines/cm (100-120 lines/inch) (correct)

    • What is a consequence of using grids with higher ratios?

    <p>Increased patient exposure and x-ray tube loading</p> Signup and view all the answers

    What does the ability of the grid to discriminate against scattered radiation depend on?

    <p>Lead strip thickness and interspace width</p> Signup and view all the answers

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