CT Imaging System Components
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Questions and Answers

What is the linear attenuation coefficient dependent on?

  • The density of the material and the photon energy
  • The composition of the material, the density of the material, and the photon energy (correct)
  • Only the composition of the material
  • Only the photon energy

    • What is the value of HUwater?

  • -1000
  • 0 (correct)
  • 1
  • 1000

    • What is the Hounsfield unit corresponding to 0.1% of the linear attenuation coefficient of water?

  • 1 (correct)
  • 1000
  • 100
  • 10

    • How many grey values are typically offered in an 8-bit grey scale?

    <p>128</p> Signup and view all the answers

    What is the purpose of the window level (WL) and window width (WW)?

    <p>To define the display of Hounsfield units</p> Signup and view all the answers

    What is the primary function of the rotating gantry in a CT imaging system?

    <p>To rotate the X-ray source and detector</p> Signup and view all the answers

    How is electrical power typically supplied to the rotating gantry?

    <p>Through contacts (brushes) from stationary slip rings</p> Signup and view all the answers

    What is the unit of measurement for Hounsfield units?

    <p>None, HU is a unitless quantity</p> Signup and view all the answers

    What is the Hounsfield unit corresponding to air?

    <p>-1000</p> Signup and view all the answers

    What happens when the same image data is displayed at different window levels and widths?

    <p>The image appears differently</p> Signup and view all the answers

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