2025/2026 COMPUTED TOMOGRAPHY FOR
TECHNOLOGISTS: 2ND EDITION EXAM REVIEW
WITH ALL COMPLETE QUESTIONS AND
Page | 1
DETAILED CORRECT VERIFIED ANSWERS (WELL
ELABORATED) GUARANTEED PASS|ALREADY
TOP RATED A+
COMPUTED TOMOGRAPHY FOR TECHNOLOGISTS
Prepare for your computed tomography certification exam 2025/2026
with this detailed exam review based on the 2nd edition textbook.
Covers essential CT principles, imaging techniques, patient care, and
safety protocols. Perfect for technologists aiming to excel in their
certification exams.
Which is NOT a synonym for the preliminary/localizer
image taken at the start of a CT examination?
A. Topogram
B. Scout
C. Scanogram
D. Spiral ..... ANSWER ...... D. Spiral
The ability of a system to differentiate, on the image, objects
with similar densities is known as:
A. High contrast resolution
B. Low contrast resolution
, C. Spatial resolution
D. Temporal resolution ..... ANSWER ...... B. Low
contrast resolution
Page | 2
Each two dimensional square of data that make up the CT
image is called a:
A. Pixel
B. Voxel
C. Matrix
D. Fragment ..... ANSWER ...... A. Pixel
How many pixels are contained in a 1,024 matrix image? A.
1,024
B. 2,048
C. 262,144
D. 1,048,576 ..... ANSWER ...... D. 1,048,576
Beam attenuation can be defined as:
A. The phenomenon by which artifacts result when lower
energy photons are preferentially absorbed, leaving only
higher-intensity photons to strike the detector array.
B. Xray energy that is produced from bombarding a
substance with fast moving electrons.
, C. The ability of the detector to capture transmitted photons
and change them to electronic signals.
D. The phenomenon by which an xray beam passing through
Page | 3
a structure is decreased in intensity or amount because of
absorption and interaction with matter. ..... ANSWER
...... D. The phenomenon by which an xray beam passing
through a structure is decreased in intensity or amount
because of absorption and interaction with matter.
Which of the following is a low attenuation structure:
A. Iodine filled aorta
B. Rib
C. Trachea
D. Calcified arteries ..... ANSWER ...... C. Trachea
An object is slightly less dense than water. What is the
expected hounsfield measurement?
A. -940
B. -10
C. 50
D. 850 ..... ANSWER ...... B. -10
, Why does the administration of iodinated contrast media
result in an enhanced image?
A. Iodinated contrast material increases the ability of the
Page | 4
enhanced structure to attenuate the xray beam.
B. Iodinated contrast material decreases the average photon
energy of the xray beam; therefore more photons are
absorbed by the patient.
C. The administration of contrast material results in a smaller
pixel, thereby increasing spatial resolution, which results in
an enhanced image.
D. ..... ANSWER ...... A. Iodinated contrast material
increases the ability of the enhanced structure to attenuate
the xray beam.
The xray beam sources for CT produce xray energy that is
polychromatic. This means:
A. When viewed by the naked eye, the beam exhibits many
different colors.
B. It produce, as a byproduct, a substance known as
polychlorinated biphenyl.
C. Photons contained in the beam are all of the same
wavelength.
D. The beam comprises photons with varying energies.
..... ANSWER ...... D. The beam comprises photons with
varying energies.
TECHNOLOGISTS: 2ND EDITION EXAM REVIEW
WITH ALL COMPLETE QUESTIONS AND
Page | 1
DETAILED CORRECT VERIFIED ANSWERS (WELL
ELABORATED) GUARANTEED PASS|ALREADY
TOP RATED A+
COMPUTED TOMOGRAPHY FOR TECHNOLOGISTS
Prepare for your computed tomography certification exam 2025/2026
with this detailed exam review based on the 2nd edition textbook.
Covers essential CT principles, imaging techniques, patient care, and
safety protocols. Perfect for technologists aiming to excel in their
certification exams.
Which is NOT a synonym for the preliminary/localizer
image taken at the start of a CT examination?
A. Topogram
B. Scout
C. Scanogram
D. Spiral ..... ANSWER ...... D. Spiral
The ability of a system to differentiate, on the image, objects
with similar densities is known as:
A. High contrast resolution
B. Low contrast resolution
, C. Spatial resolution
D. Temporal resolution ..... ANSWER ...... B. Low
contrast resolution
Page | 2
Each two dimensional square of data that make up the CT
image is called a:
A. Pixel
B. Voxel
C. Matrix
D. Fragment ..... ANSWER ...... A. Pixel
How many pixels are contained in a 1,024 matrix image? A.
1,024
B. 2,048
C. 262,144
D. 1,048,576 ..... ANSWER ...... D. 1,048,576
Beam attenuation can be defined as:
A. The phenomenon by which artifacts result when lower
energy photons are preferentially absorbed, leaving only
higher-intensity photons to strike the detector array.
B. Xray energy that is produced from bombarding a
substance with fast moving electrons.
, C. The ability of the detector to capture transmitted photons
and change them to electronic signals.
D. The phenomenon by which an xray beam passing through
Page | 3
a structure is decreased in intensity or amount because of
absorption and interaction with matter. ..... ANSWER
...... D. The phenomenon by which an xray beam passing
through a structure is decreased in intensity or amount
because of absorption and interaction with matter.
Which of the following is a low attenuation structure:
A. Iodine filled aorta
B. Rib
C. Trachea
D. Calcified arteries ..... ANSWER ...... C. Trachea
An object is slightly less dense than water. What is the
expected hounsfield measurement?
A. -940
B. -10
C. 50
D. 850 ..... ANSWER ...... B. -10
, Why does the administration of iodinated contrast media
result in an enhanced image?
A. Iodinated contrast material increases the ability of the
Page | 4
enhanced structure to attenuate the xray beam.
B. Iodinated contrast material decreases the average photon
energy of the xray beam; therefore more photons are
absorbed by the patient.
C. The administration of contrast material results in a smaller
pixel, thereby increasing spatial resolution, which results in
an enhanced image.
D. ..... ANSWER ...... A. Iodinated contrast material
increases the ability of the enhanced structure to attenuate
the xray beam.
The xray beam sources for CT produce xray energy that is
polychromatic. This means:
A. When viewed by the naked eye, the beam exhibits many
different colors.
B. It produce, as a byproduct, a substance known as
polychlorinated biphenyl.
C. Photons contained in the beam are all of the same
wavelength.
D. The beam comprises photons with varying energies.
..... ANSWER ...... D. The beam comprises photons with
varying energies.
