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Questions and Answers
What is the primary purpose of the described imaging system?
What is the primary purpose of the described imaging system?
- Full body scans
- Cardiac scans
- Head scans (correct)
- Lung scans
What method is used for obtaining measurements within the imaging system?
What method is used for obtaining measurements within the imaging system?
- Rotate only with a wide beam
- Translate/rotate with a fan beam
- Translate/rotate with a flat beam
- Rotate/translate with a pencil beam (correct)
What measurement angle does the gantry rotate to acquire attenuation measurements?
What measurement angle does the gantry rotate to acquire attenuation measurements?
- 180° (correct)
- 270°
- 90°
- 360°
What is a significant drawback of the described imaging system?
What is a significant drawback of the described imaging system?
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How does the system compare in terms of scatter radiation?
How does the system compare in terms of scatter radiation?
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Study Notes
Pencil Beam CT
- Dedicated to head scans
- Collimated pencil beam and a single detector move across the patient
- Gantry rotates 1° and acquires 180° attenuation measurements
- Scan time per slice is 5 minutes
- Reduced scatter radiation
- Drawbacks include long scan time and limited image quality
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