Computed Tomography Exam Prep Questions
with Accurate Answers
A 64-slice MSCT system employs an array of 64 detectors, each with a dimension
of 0.625 mm. What beam collimation is required to expose the middle 32
detectors of the array to transmitted x-radiation?
A. 10 mm
B. 20 mm
C. 32 mm
D. 64 mm correct answer B
An acquisition is made on a 4-slice MSCT system with a detector array of 16 x
1.25-mm detector elements along the z-axis. With a selected beam width of 20
mm, what beam pitch would result in the table moving 35.00 mm for each
rotation of the gantry?
A. 1.0
B. 1.5
C. 1.75
D. 2.0 correct answer C
An average range for activated partial thromboplastin time (PTT) is:
A. 10-12 secs
B. 17-21 secs
C. 25-35 secs
, D. 43-55 secs correct answer
During CT angiography, images may be reconstructed using only the greatest
density encountered along each ray. This type of specialized CT image is called
a(n):
A. 3-D model
B. volume-rendered image
C. MIP image
D. surface-rendered image 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
In 1917, Austrian mathematician __________ proved that it was possible to
reconstruct a three-dimensional object from the infinite set of all of its
projections.
A. Radon
B. Tsien
C. Bracewell
with Accurate Answers
A 64-slice MSCT system employs an array of 64 detectors, each with a dimension
of 0.625 mm. What beam collimation is required to expose the middle 32
detectors of the array to transmitted x-radiation?
A. 10 mm
B. 20 mm
C. 32 mm
D. 64 mm correct answer B
An acquisition is made on a 4-slice MSCT system with a detector array of 16 x
1.25-mm detector elements along the z-axis. With a selected beam width of 20
mm, what beam pitch would result in the table moving 35.00 mm for each
rotation of the gantry?
A. 1.0
B. 1.5
C. 1.75
D. 2.0 correct answer C
An average range for activated partial thromboplastin time (PTT) is:
A. 10-12 secs
B. 17-21 secs
C. 25-35 secs
, D. 43-55 secs correct answer
During CT angiography, images may be reconstructed using only the greatest
density encountered along each ray. This type of specialized CT image is called
a(n):
A. 3-D model
B. volume-rendered image
C. MIP image
D. surface-rendered image 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
In 1917, Austrian mathematician __________ proved that it was possible to
reconstruct a three-dimensional object from the infinite set of all of its
projections.
A. Radon
B. Tsien
C. Bracewell
