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CT Image Production exam questions with 100% correct answers
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CT Image Production exam questionsWhich of the following reduces the scatter radiation reaching the detectors?
A. post-patient collimation
B. Pre-patient collimation
C. Pre-detector collimation
D. Both a and c
D. Both a and c
Which of the following is the primary interaction between x-ray photons and tissue during computed
tomography?
A. Bremsstrahlung
B. Characteristic
C. Compton effect
D. Coherent scatter
C. Compton effect
The process by which electrons are produced at the cathode of a CT x-ray tube is known as:
A. rectification.
B. anode heel effect.
C. thermionic emission.
D. isotropic emission.
C. thermionic emission.
,The assignment of different generations to CT scanners is based on the configuration of the:
A. patient and gantry.
B. tube and detectors.
C. anode and cathode.
D. tube and collimators.
B. tube and detectors.
When one is using a third-generation CT scanner, it is important that reference detectors positioned at
the peripheral portions of the detector array be exposed to:
A. homogeneous radiation.
B. unattenuated radiation.
C. monochromatic radiation.
D. remnant radiation.
B. unattenuated radiation.
In 1979, the scientists __________ and __________ shared the Nobel Prize for their research in
computed tomography.
A. Watson and Crick
B. Olendorf and Hounsfield
C. Hounsfield and Cormack
D. Hounsfield and Ambrose
C. Hounsfield and Cormack
The type of compensating filter used at the x-ray tube of a CT scanner is called a:
A. kernel.
B. water bath.
,C. bow-tie filter.
D. wedge filter.
C. bow-tie filter.
The interaction between x-ray and matter that is responsible for the production of the scatter radiation
absorbed by the patient and detectors is:
A. Compton effect.
B. bremsstrahlung.
C. photoelectric.
D. characteristic.
A. Compton effect.
The types of detectors used in computed tomography are:
1. Gas ionization
2. Stimulable phosphor
3. Scintillation
A. 1 only.
B. 3 only.
C. 1 and 3 only.
D. 2 and 3 only.
C. 1 and 3 only.
Which of the following is used in gas ionization CT detectors?
A. Neon
B. Xenon
, C. Helium
D. Nitrogen
B. Xenon
Which of the following statements concerning the translate-rotate mode of CT data acquisition is/are
correct?
1. 360-degree circular detector arrays are used.
2. Data are collected only during translation.
3. Was used in first- and second-generation CT scanners.
A. 2 only
B. 3 only
C. 1 and 2 only
D. 2 and 3 only
D. 2 and 3 only
Which of the following terms accurately describes the type of x-ray beam used in a third-generation CT
scanner?
A. Pencil beam
B. Fan beam
C. Nutating beam
D. Electron beam
B. Fan beam
Which of the following technologic advances has led to the development of spiral/helical CT scanning?
1. Slip-ring technology
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