CT Exam 1 Questions with Accurate Answers
______ is the mathematical process whereby data from tube rotations just above
and just below a given slice position are used for image reconstruction. This
process allows for the reconstruction of a thin, motion free image form a
volumetric data set acquired from a moving patient
A. Convolution
B. Filtered back projection
C. Interpolation
D. Fourier Transform correct answer C
_______ is the collection of the x-ray transmission measurements from the
patient
A. Image Reconstruction
B. Image Display
C. Data Acquisition
D. All the above correct answer C
A homogeneous beam is comprised of photons that have different energies
A. True
B. False correct answer B
,A star filter is common in CT filtration because it compensates for the difference
in beam path length through the axial plane of the object such that a more
uniform fluence can be delivered to the detector.
A. True
B. False correct answer B; Bowtie
Afterglow correct answer Persistence of the image even after the radiation has
been turned off
Air has:
A. 0HU
B. -1000HU
C. +1000HU correct answer B
All of the following are major systems in the basic equipment configuration for CT
EXCEPT:
A. Dictation System
B. Imaging display, recording, storage, an communication system
C. Computer System
D. Imaging System correct answer A
All of the following are radiation beams produced by an x-ray tube designed for
CT EXCEPT:
, A. Homogeneous beam
B. Hetergeneous beam
C. Polychromatic beam
D. Polyenergetic Beam correct answer A
All the following are typical scan parameters for spiral/helical computed
tomography scanners except:
A. Table speed
B. Scan range
C. Number of Revolutions
D. Patient Size correct answer D
Arrange MR Imaging, CT Imaging, and plain film x-ray imaging in order from best
to worst in their ability to differentiate soft tissues in the body:
A. X-ray is better than CT is better than MRI
B. MRI is better than CT is better than x-ray
C. CT is better than MRI is better than x-ray
D. X-ray is better then MRI is better than CT correct answer B
As pitch increases, the image quality ________
A. Decreases
______ is the mathematical process whereby data from tube rotations just above
and just below a given slice position are used for image reconstruction. This
process allows for the reconstruction of a thin, motion free image form a
volumetric data set acquired from a moving patient
A. Convolution
B. Filtered back projection
C. Interpolation
D. Fourier Transform correct answer C
_______ is the collection of the x-ray transmission measurements from the
patient
A. Image Reconstruction
B. Image Display
C. Data Acquisition
D. All the above correct answer C
A homogeneous beam is comprised of photons that have different energies
A. True
B. False correct answer B
,A star filter is common in CT filtration because it compensates for the difference
in beam path length through the axial plane of the object such that a more
uniform fluence can be delivered to the detector.
A. True
B. False correct answer B; Bowtie
Afterglow correct answer Persistence of the image even after the radiation has
been turned off
Air has:
A. 0HU
B. -1000HU
C. +1000HU correct answer B
All of the following are major systems in the basic equipment configuration for CT
EXCEPT:
A. Dictation System
B. Imaging display, recording, storage, an communication system
C. Computer System
D. Imaging System correct answer A
All of the following are radiation beams produced by an x-ray tube designed for
CT EXCEPT:
, A. Homogeneous beam
B. Hetergeneous beam
C. Polychromatic beam
D. Polyenergetic Beam correct answer A
All the following are typical scan parameters for spiral/helical computed
tomography scanners except:
A. Table speed
B. Scan range
C. Number of Revolutions
D. Patient Size correct answer D
Arrange MR Imaging, CT Imaging, and plain film x-ray imaging in order from best
to worst in their ability to differentiate soft tissues in the body:
A. X-ray is better than CT is better than MRI
B. MRI is better than CT is better than x-ray
C. CT is better than MRI is better than x-ray
D. X-ray is better then MRI is better than CT correct answer B
As pitch increases, the image quality ________
A. Decreases
