COMPUTED TOMOGRAPHY EXAM| COMPUTED
TOMOGRAPHY FINAL EXAM QUESTIONS AND
ANSWERS NEWLY MODIFIED TESTED AND
APPROVED!!!
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 --CORRECT ANSWER--D
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
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,D. Electron beam --CORRECT ANSWER--B
Which of the following technologic advances has led to the development of
spiral/helical CT scanning?
1. Slip-ring technology
2. Electron beam technology
3. High-efficiency x-ray tubes
A. 1 only
B. 1 and 2 only
C. 1 and 3 only
D. 1, 2, and 3 --CORRECT ANSWER--C
For a given CT acquisition, the calculated mAs applied to each reconstructed
slice may be referred to as the:
A. effective mAs.
B. peak mAs.
C. absorbed mAs.
D. constant mAs --CORRECT ANSWER--A
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,Which of the following technical factor adjustments will result in a reduction in
patient radiation dose?
A. Increase milliamperage (mA).
B. Decrease detector pitch.
C. Increase scan time.
D. Decrease milliamperage (mA) --CORRECT ANSWER--D
The approximate inherent filtration of the CT x-ray amounts to an aluminum
equivalent of:
A. 1.2 mm
B. 3.0 mm
C. 5.8 mm
D. 10.0 mm --CORRECT ANSWER--B
Which of the following acquisitions may be characterized as noncontiguous?
A. 2.5-mm sections reconstructed every 1.25 mm
B. 5.0-mm sections reconstructed every 7.5 mm
C. 3.75-mm sections reconstructed every 3.75 mm
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, D. 20-second cine acquisition with 1.25-mm sections --CORRECT ANSWER--
B
Which of the following acquisitions may be characterized as overlapping?
A. 2.5-mm sections reconstructed every 1.25 mm
B. 5.0-mm sections reconstructed every 7.5 mm
C. 3.75-mm sections reconstructed every 3.75 mm
D. 20-second cine acquisition with 1.25-mm sections --CORRECT ANSWER--
A
Which 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 & C --CORRECT ANSWER--D. Both A & C
Which of the following is the primary interaction between x-ray photons and
tissue during computed tomography?
A. Bremsstrahlung
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TOMOGRAPHY FINAL EXAM QUESTIONS AND
ANSWERS NEWLY MODIFIED TESTED AND
APPROVED!!!
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 --CORRECT ANSWER--D
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
Page 1 of 91
,D. Electron beam --CORRECT ANSWER--B
Which of the following technologic advances has led to the development of
spiral/helical CT scanning?
1. Slip-ring technology
2. Electron beam technology
3. High-efficiency x-ray tubes
A. 1 only
B. 1 and 2 only
C. 1 and 3 only
D. 1, 2, and 3 --CORRECT ANSWER--C
For a given CT acquisition, the calculated mAs applied to each reconstructed
slice may be referred to as the:
A. effective mAs.
B. peak mAs.
C. absorbed mAs.
D. constant mAs --CORRECT ANSWER--A
Page 2 of 91
,Which of the following technical factor adjustments will result in a reduction in
patient radiation dose?
A. Increase milliamperage (mA).
B. Decrease detector pitch.
C. Increase scan time.
D. Decrease milliamperage (mA) --CORRECT ANSWER--D
The approximate inherent filtration of the CT x-ray amounts to an aluminum
equivalent of:
A. 1.2 mm
B. 3.0 mm
C. 5.8 mm
D. 10.0 mm --CORRECT ANSWER--B
Which of the following acquisitions may be characterized as noncontiguous?
A. 2.5-mm sections reconstructed every 1.25 mm
B. 5.0-mm sections reconstructed every 7.5 mm
C. 3.75-mm sections reconstructed every 3.75 mm
Page 3 of 91
, D. 20-second cine acquisition with 1.25-mm sections --CORRECT ANSWER--
B
Which of the following acquisitions may be characterized as overlapping?
A. 2.5-mm sections reconstructed every 1.25 mm
B. 5.0-mm sections reconstructed every 7.5 mm
C. 3.75-mm sections reconstructed every 3.75 mm
D. 20-second cine acquisition with 1.25-mm sections --CORRECT ANSWER--
A
Which 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 & C --CORRECT ANSWER--D. Both A & C
Which of the following is the primary interaction between x-ray photons and
tissue during computed tomography?
A. Bremsstrahlung
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