CT Image Grayscale and Windowing
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Questions and Answers

What is the purpose of windowing in a CT image?

  • To limit the number of shades of gray to optimize viewing by the human eye (correct)
  • To adjust the size of the CT image on the computer screen
  • To increase the number of shades of gray for a more detailed image
  • To compress the grayscale to enhance contrast

    • How does window width (WW) influence CT image presentation?

  • It adjusts the size of the CT image
  • It artificially defines the number of shades of grey presented to the viewer (correct)
  • It controls the brightness of the CT image
  • It increases the contrast in the CT image

    • What is the role of window level (WL) in a CT image?

  • It controls the brightness of the CT image (correct)
  • It adjusts the size of the CT image on the computer screen
  • It enhances the resolution of the CT image
  • It artificially defines the number of shades of grey presented to the viewer

    • Why can't a CT image display all 5,000–10,000 possible shades of gray?

    <p>Due to limitations in human eye perception</p> Signup and view all the answers

    When is windowing typically performed in relation to a CT image?

    <p>After obtaining, reconstructing, and transferring the image to the viewing workstation</p> Signup and view all the answers

    What aspect of a CT image does windowing control?

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

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