Computed Tomography Questions and
Correct Answers/ Latest Update /
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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
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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)