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Imaging Equipment: Chapter 28- Computed Tomography (CT) fully solved
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Imaging Equipment: Chapter 28-Computed Tomography (CT)
what is performed by moving a tube and an IR around a point of focus? - correct answer ✔✔computed
tomography
what is considered axial tomography because the plane of the image is parallel with the long axis of the
body? - correct answer ✔✔conventional tomography
what is it called when images are produced perpendicular with the long axis of the body and is also
called transverse tomography? - correct answer ✔✔transaxial tomography
why is it called "computed tomography"? - correct answer ✔✔because it was created by a computer
who developed computed tomography? - correct answer ✔✔an engineer named Godfry Newbold
Hounsfield
when and where did Hounsfield develop computed tomography? - correct answer ✔✔in England in the
late 1960s
when was the first CT brain machine used? - correct answer ✔✔used in clinical studies in 1971
when was the CT scanner able to be used diagnostically? - correct answer ✔✔in the 1980s with the
invention of supercomputers
what generation of CT scanners used a pencil shaped x-ray beam and had 1 single detector? - correct
answer ✔✔first generation
what generation of CT scanners had a fan shaped beam with a multiple detector array? - correct answer
✔✔2nd generation
, what are the advantages and disadvantages between the 1st and 2nd generation CT scanners? - correct
answer ✔✔advantage- it was much faster
disadvantage- increased scatter radiation
what generations of CT scanners used linear array? - correct answer ✔✔first and second
what generation of CT scanners used curvilinear array? - correct answer ✔✔3rd and on
what generation of CT scanners operated in the rotate only mode with a fan x-ray beam and multiple
detector array revolving concentrically around the patient? - correct answer ✔✔3rd generation
what is a disadvantage of the 3rd generation CT scanner? - correct answer ✔✔it has a ring artifact
what is a ring artifact? - correct answer ✔✔happens when one detector is defective and a ring is noticed
on the image
what generation of CT scanners has rotate-stationary configuration and has detectors that are stationary
all around the patient and the tube rotates? - correct answer ✔✔4th generation
what generation of CT scanners is the fastest of all and may scan a whole body part in seconds? - correct
answer ✔✔5th generation
what generation of CT scanners utilizes many rows of detectors and constant movement of the tube
along with advanced interpolation and extrapolation algorithms to produce images? - correct answer
✔✔5th generation
what uses slip ring technology for continuous movement of the x-ray tube and is also called multi-slice or
helical tomography? - correct answer ✔✔5th generation CT scanners
what are the two processes for reconstruction? - correct answer ✔✔interpolation and extrapolation
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