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  2. Imaging Techniques
  3. Radiography
  4. CT

CT

  • Describe beam hardening
  • Describe motion artifact
  • Describe partial volume artifact
  • Describe riing artifact
  • Describe star artifact
  • Describe streak artifact
  • For CT, what is meant by the level?
  • For CT, what is meant by the window?
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for CSF?
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for air?
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for bone?
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for fat?
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for fresh clot?
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for gray matter
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for muscle?
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for water?
  • For a -1000 to +1000 HU scale, what is the approximate value of the HU for white matter?
  • How does CT scanning work?
  • If a CT image is viewed with a window width of 100 HU and a level of 75 HU, what are the lower values of the window (in HU)?
  • If a CT image is viewed with a window width of 100 HU and a level of 75 HU, what are the upper values of the window (in HU)
  • What is an Hounsefield Unit (HU)?
  • What is the LAC?
  • What is the range of HU?
  • What two things determine the beam width in the patient in CT?
  • With this window and level W 100, L 75, how will structures more than 125 HU look?
  • With this window and level, how will structures less than 25 HU look?

Book traversal links for CT

  • ‹ Which bones are typically analyzed?
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  • Describe beam hardening ›