COMPUTED TOMOGRAPHY EXAM PREP MATERIAL
NEWEST 2026 2027 COMPLETE ALL QUESTIONS
AND CORRECT DETAILED ANSWERS VERIFIED
ANSWERS BRAND NEW VERSION HIGH YIELD STUDY
GUIDE ACTUAL UPDATED PRACTICE QUESTIONS CT
CERTIFICATION EXAM PREPARATION SUCCESS
REVIEW
CT basics - CORRECT ANSWER=• Essentially an x-ray tube that rotates round the pt
• Table moves, feeding pt into the gantry
• Each large is data collected as a series of slices o Each slice is
divided into voxels (volume elements)
Each sweep of the source-detector around the body during CT is called a _____. -
CORRECT ANSWER=translation
Each CT projection records variations in ____. - CORRECT ANSWER=mass density and
effective atomic number
Each CT projection is ____.
1. printed on film
2. stored on the computer
,3. displayed on the monitor - CORRECT ANSWER=stored on the computer
The cross-sectional anatomy is translated into ____ during CT reconstruction. - CORRECT
ANSWER=a matrix of values
The first generation of computed tomography used ______ detector (s). - CORRECT
ANSWER=one
The principal drawback of the first-generation CT scanner was the ____. - CORRECT
ANSWER=long scanning time
What is windowing? - CORRECT ANSWER=A method in which the CT image gray scale
can be manipulated in order to enhance different structures of varying tissues
What are the 2 windowing mechanisms? - CORRECT ANSWER=- Window
width - Window level
What is Window Width (WW)? - CORRECT ANSWER=- The range of the CT numbers in
the image
- Determines the maximum number of shades of gray that can be displayed on the CT
monitor - Effects contrast
,What is Window Level (WL)? - CORRECT ANSWER=- The center or midpoint of the range
of CT numbers
- Effects brightness
Wide window widths (400 to 2000 HU) are necessary for ____? - CORRECT
ANSWER=Varying body tissues
Narrow window widths (50 to 350 HU) are necessary for ____? - CORRECT
ANSWER=Different tissues of similar densities
What are the effects of WW on image contrast? - CORRECT ANSWER=- As the WW
increases, the contrast decreases
- As the WW decreases, the contrast increases
What are the effects of WL on image brightness? - CORRECT ANSWER=- Moving the WL
toward the higher CT numbers results in a darker image
- Moving the WL toward the lower CT numbers results in a brighter image
What is a multi-slice scanner (MSCT)? - CORRECT ANSWER=- CT system equipped
with a multiple-row detector array to simultaneously collect data at different slice locations
- Can scan up to 64 slices
, In CT, the attenuated image-forming radiation is detected by what? - CORRECT
ANSWER=A solid state image receptor
What is Helical CT? - CORRECT ANSWER=- Continuous gantry rotation + continuous
table feed
- Scan data traces a helical path or spiral around patient
What is Isotropic Imaging? - CORRECT ANSWER=2D pixel in a CT image represents a 3D
voxel
Name the 3 types of Data acquisition systems? - CORRECT ANSWER=- Conventional
- Helical single slice (spiral)
- Multi-slice
What is a Linear Attenuation coefficient? - CORRECT ANSWER=Characterizes how easily
a volume of material can be penetrated by the x-rays
What is a bowtie filter? - CORRECT ANSWER=Used to allow a uniform beam to reach
detectors
What occurs with CT filtration? - CORRECT ANSWER=- Removes long wavelength x-rays
which contributes to patient dose
NEWEST 2026 2027 COMPLETE ALL QUESTIONS
AND CORRECT DETAILED ANSWERS VERIFIED
ANSWERS BRAND NEW VERSION HIGH YIELD STUDY
GUIDE ACTUAL UPDATED PRACTICE QUESTIONS CT
CERTIFICATION EXAM PREPARATION SUCCESS
REVIEW
CT basics - CORRECT ANSWER=• Essentially an x-ray tube that rotates round the pt
• Table moves, feeding pt into the gantry
• Each large is data collected as a series of slices o Each slice is
divided into voxels (volume elements)
Each sweep of the source-detector around the body during CT is called a _____. -
CORRECT ANSWER=translation
Each CT projection records variations in ____. - CORRECT ANSWER=mass density and
effective atomic number
Each CT projection is ____.
1. printed on film
2. stored on the computer
,3. displayed on the monitor - CORRECT ANSWER=stored on the computer
The cross-sectional anatomy is translated into ____ during CT reconstruction. - CORRECT
ANSWER=a matrix of values
The first generation of computed tomography used ______ detector (s). - CORRECT
ANSWER=one
The principal drawback of the first-generation CT scanner was the ____. - CORRECT
ANSWER=long scanning time
What is windowing? - CORRECT ANSWER=A method in which the CT image gray scale
can be manipulated in order to enhance different structures of varying tissues
What are the 2 windowing mechanisms? - CORRECT ANSWER=- Window
width - Window level
What is Window Width (WW)? - CORRECT ANSWER=- The range of the CT numbers in
the image
- Determines the maximum number of shades of gray that can be displayed on the CT
monitor - Effects contrast
,What is Window Level (WL)? - CORRECT ANSWER=- The center or midpoint of the range
of CT numbers
- Effects brightness
Wide window widths (400 to 2000 HU) are necessary for ____? - CORRECT
ANSWER=Varying body tissues
Narrow window widths (50 to 350 HU) are necessary for ____? - CORRECT
ANSWER=Different tissues of similar densities
What are the effects of WW on image contrast? - CORRECT ANSWER=- As the WW
increases, the contrast decreases
- As the WW decreases, the contrast increases
What are the effects of WL on image brightness? - CORRECT ANSWER=- Moving the WL
toward the higher CT numbers results in a darker image
- Moving the WL toward the lower CT numbers results in a brighter image
What is a multi-slice scanner (MSCT)? - CORRECT ANSWER=- CT system equipped
with a multiple-row detector array to simultaneously collect data at different slice locations
- Can scan up to 64 slices
, In CT, the attenuated image-forming radiation is detected by what? - CORRECT
ANSWER=A solid state image receptor
What is Helical CT? - CORRECT ANSWER=- Continuous gantry rotation + continuous
table feed
- Scan data traces a helical path or spiral around patient
What is Isotropic Imaging? - CORRECT ANSWER=2D pixel in a CT image represents a 3D
voxel
Name the 3 types of Data acquisition systems? - CORRECT ANSWER=- Conventional
- Helical single slice (spiral)
- Multi-slice
What is a Linear Attenuation coefficient? - CORRECT ANSWER=Characterizes how easily
a volume of material can be penetrated by the x-rays
What is a bowtie filter? - CORRECT ANSWER=Used to allow a uniform beam to reach
detectors
What occurs with CT filtration? - CORRECT ANSWER=- Removes long wavelength x-rays
which contributes to patient dose
