53 Questions
Which type of geometry does the EBCT scanner use compared to conventional CT scanners?
Stationary geometry
How much faster does the EBCT scanner acquire CT data compared to conventional CT scanners?
10 times faster
Which of the following is NOT a clinical application of the EBCT scanner?
Magnetic resonance imaging
Which generation of CT scanners uses a translate-rotate configuration with a single detector and a finely collimated beam?
1st generation
How many detectors are used in the 1st generation CT scanner?
Single detector
How many degrees does the tube and detector rotate after one translation in the 1st generation CT scanner?
1 degree
How long does it take to gather enough information for one slice in the 1st generation CT scanner?
5 minutes
Which generation of CT scanners is not capable of body imaging, but only head imaging?
1st generation
Which generation of CT scanners uses a translate-rotate configuration with a larger rotation increment and multiple pencil beams?
2nd generation
In which generation of CT scanners is the process of rectilinear multiple pencil beam scanning repeated for 180 degrees?
2nd generation
Which generation of CT scanners is capable of body imaging?
3rd generation
Which generation of CT scanners uses a rotate-only configuration with a fixed ring of detectors?
4th generation
Which generation of CT scanners is characterized by a rotating x-ray tube and a stationary ring of detectors?
4th generation
Which generation of CT scanners is characterized by a translate-rotate configuration with a single detector and a finely collimated beam?
1st generation scanner
Which generation of CT scanners is capable of body imaging?
3rd generation scanner
How long does it take to gather enough information for one slice in the 1st generation CT scanner?
5 minutes
Which type of geometry does the EBCT scanner use compared to conventional CT scanners?
Stationary/stationary geometry
How many times faster does the EBCT scanner acquire CT data compared to conventional CT scanners?
10 times faster
Which of the following is NOT a clinical application of the EBCT scanner?
Musculoskeletal imaging
Which generation of CT scanners uses a rotate-stationary configuration with a fan-shaped beam and a circular detector array?
4th generation
What is the main disadvantage of the 3rd generation CT scanner?
Ring artifacts
Which generation of CT scanners is capable of acquiring scan data in milliseconds and producing dynamic 3D images?
5th generation
What is the mode of operation in the electron beam CT (EBCT) scanner that allows for scanning multiple target rings and generating multiple scans?
Multislice mode
Which generation of CT scanners is characterized by a translate-rotate configuration with a single detector and a finely collimated beam?
1st generation
How many times does the tube and detector rotate after one translation in the 1st generation CT scanner?
90 degrees
How many detectors are used in the 1st generation CT scanner?
Single detector
How long does it take to gather enough information for one slice in the 1st generation CT scanner?
5 minutes
Which generation of CT scanners is capable of body imaging?
3rd generation
Which generation of CT scanners uses a rotate-stationary configuration with a fan-shaped beam and a circular detector array?
4th generation
Which generation of CT scanners is capable of acquiring scan data in milliseconds and producing dynamic 3D images?
5th generation
What is the main disadvantage of the 3rd generation CT scanner?
Limited field of view
Which type of geometry does the EBCT scanner use compared to conventional CT scanners?
Rotate-only configuration
How much faster does the EBCT scanner acquire CT data compared to conventional CT scanners?
4 times faster
Which generation of CT scanners is characterized by a rotating x-ray tube and a stationary ring of detectors?
3rd generation
How many detectors are used in the 1st generation CT scanner?
30
Which generation of CT scanners uses a translate-rotate configuration with a larger rotation increment and multiple pencil beams?
2nd generation
What is the mode of operation in the electron beam CT (EBCT) scanner that allows for scanning multiple target rings and generating multiple scans?
Multislice mode
Which generation of CT scanners is NOT capable of body imaging, but only head imaging?
1st generation
Which generation of CT scanners is capable of acquiring scan data in milliseconds and producing dynamic 3D images?
5th generation
How much faster does the EBCT scanner acquire CT data compared to conventional CT scanners?
10 times
Which type of geometry does the EBCT scanner use compared to conventional CT scanners?
Rotate-stationary
In which generation of CT scanners is the process of rectilinear multiple pencil beam scanning repeated for 180 degrees?
1st generation
What is the main disadvantage of the 3rd generation CT scanner?
Ring artifacts
Which type of geometry does the EBCT scanner use compared to conventional CT scanners?
Rotate-stationary geometry
How many times faster does the EBCT scanner acquire CT data compared to conventional CT scanners?
10 times faster
Which of the following is NOT a clinical application of the EBCT scanner?
Musculoskeletal imaging
Which generation of CT scanners uses a rotate-only configuration with a fixed ring of detectors?
1st generation
Which generation of CT scanners is capable of body imaging?
3rd generation
What is the mode of operation in the electron beam CT (EBCT) scanner that allows for scanning multiple target rings and generating multiple scans?
Rotate-rotate geometry
Which generation of CT scanners uses a translate-rotate configuration with a larger rotation increment and multiple pencil beams?
2nd generation
Which generation of CT scanners is characterized by a translate-rotate configuration with a single detector and a finely collimated beam?
4th generation
How many detectors are used in the 1st generation CT scanner?
16 detectors
What is the main disadvantage of the 3rd generation CT scanner?
Limited field of view
Study Notes
CT Scanners
- EBCT scanner uses electron beam geometry, whereas conventional CT scanners use mechanical geometry.
- EBCT scanner acquires CT data 10-100 times faster than conventional CT scanners.
Clinical Applications
- EBCT scanner is not used for bone densitometry.
1st Generation CT Scanners
- Uses a translate-rotate configuration with a single detector and a finely collimated beam.
- Has one detector.
- Tube and detector rotate 360 degrees after one translation.
- Takes 4-5 minutes to gather enough information for one slice.
2nd Generation CT Scanners
- Uses a translate-rotate configuration with a larger rotation increment and multiple pencil beams.
- Is capable of body imaging.
3rd Generation CT Scanners
- Uses a rotate-stationary configuration with a fan-shaped beam and a circular detector array.
- Main disadvantage is that it is sensitive to patient movement.
4th Generation CT Scanners
- Uses a rotate-only configuration with a fixed ring of detectors.
- Is capable of body imaging.
Electron Beam CT (EBCT) Scanners
- Uses a rotating x-ray tube and a stationary ring of detectors.
- Is capable of acquiring scan data in milliseconds and producing dynamic 3D images.
- Mode of operation that allows for scanning multiple target rings and generating multiple scans is called "multi-slice scanning".
- Is capable of body imaging.
Test your knowledge on the generations of computed tomography (CT) with this quiz. Explore the classification of CT based on various factors and learn about the uses, advantages, and disadvantages of each generation.
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