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Generations of CT Scanners questions n answers
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Generations of CT Scanners questions n answers
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Generations of CT ScannersFirst Generation Scanners - correct answer ✔✔1971
Built by EMI
Pencil beam with a single detector
Source and detector were linearly translated to acquire individual measurements
Rotated 1 degree to next angular position to get next set of images
Total scan time about 5 minutes per image (pt motion)
Second Generation Scanners - correct answer ✔✔Fan beam geometry
1975 EMI introduced 30 detector scanner
(complete scan in 20 seconds)
Used Multiple detectors in a straight line
Tube/detector moved across the patient then rotated 5 degrees
Third Generation Scanners - correct answer ✔✔1975
Systems used today are this type
Fan Beam
Multiple detectors along an arc
Tube and detector rotate around the patient
Total scan time faster than 1 second per image
Incorperated SLIP RINGS
Also called rotate rotate scanners
Fourth Generation Scanners - correct answer ✔✔Fan beam
Multiple detectors encircles the patient
Total scan time is faster than 1 second per image
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