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Computed Tomography questions with verified answers.
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Computed Tomography questions with verified answers.
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Computed Tomography questions withverified answers.
1st and 2nd generation scanners ANS - translate---rotate
3rd generation scanners ANS - rotate---rotate
4th generation scanners (3b) ANS - rotate---fixed
5th generation scanners (3c) ANS - spiral/helical
-has lsip ring so can do single motion all around patient
axial CT ANS - -first type ever done
-takes image slices top to bottom
-uses bone windows (bone uses high number =4,000, while soft tissue uses low number = 300)
coronal CT ANS - -takes pic front to back
-used a lot to visualize sinuses
-use bone windows
-restorations in teeth interfere with image= beam hardening
sagittal CT ANS - -image taken from one side to other
isodense measurements (2D) ANS - select portion of image with certain radiopacity and ask computer
to find all areas with similar radiopacity
panoramic CT (2D) ANS - image made following line drawn by computer that follows mandible path so
image looks like pantomograph
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