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? Up Describe beam hardening ›