CT Filters and Filtration in Clinical Settings
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Questions and Answers

What is the main purpose of using a special filter in clinical CT?

  • To reduce patient dose
  • To remove long-wavelength x rays (correct)
  • To increase the mean energy of the x-ray beam
  • To produce uniform beam hardening

    • What is the thickness of the inherent filtration used in CT?

  • 0.1 to 0.4 mm
  • Less than 0.1 mm
  • More than 3 mm
  • About 3 mm Al-equivalent (correct)

    • What happens to the energy distribution of the radiation beam when it passes through the filter and the object?

  • It creates beam hardening (correct)
  • It decreases the mean energy of the beam
  • It reduces uniformity
  • It increases patient dose

    • Why does filtration result in the beam becoming 'harder'?

    <p>By increasing the mean energy of the beam (C)</p> Signup and view all the answers

    What is the purpose of added filtration in clinical CT?

    <p>To shape the energy distribution for uniform beam hardening (D)</p> Signup and view all the answers

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