Radiologic Science for Technologists, 13th
Edition (Bushong) | Exam Prep 2025–2026,
Comprehensive Study Guide, 200+ Practice
Questions with Verified Answers &
Rationales, Test Bank, Lecture Notes &
Review Materials for Radiology Students
Question 1
What is the primary purpose of radiologic technology?
A) To produce images of the human body for diagnostic purposes. (Correct Option)
B) To provide therapeutic treatments
C) To conduct research in radiology
D) To dispense medications
Rationale:
The primary purpose of radiologic technology is to produce images of the human body
for diagnostic purposes, aiding in the detection and treatment of medical conditions.
Question 2
What type of radiation is commonly used in X-ray imaging?
A) Ionizing radiation. (Correct Option)
B) Non-ionizing radiation
C) Radioactive radiation
D) Electromagnetic radiation
Rationale:
Ionizing radiation is commonly used in X-ray imaging, as it has enough energy to remove
tightly bound electrons from atoms, allowing for the creation of images.
Question 3
Which of the following is a key principle of radiation protection?
A) Time, distance, and shielding. (Correct Option)
B) Speed, frequency, and intensity
C) Exposure, duration, and control
D) Altitude, pressure, and temperature
Rationale:
,The key principles of radiation protection are time, distance, and shielding, which help
minimize exposure to radiation for both patients and healthcare workers.
Question 4
What is the primary function of a radiographic film?
A) To capture the image of the X-ray beam. (Correct Option)
B) To enhance the visibility of soft tissues
C) To store digital images
D) To measure radiation dose
Rationale:
The primary function of a radiographic film is to capture the image of the X-ray beam,
allowing for the visualization of internal structures.
Question 5
What does the term "contrast" refer to in radiologic imaging?
A) The difference in density between adjacent areas on an image. (Correct Option)
B) The clarity of the image
C) The color variation in the film
D) The speed of image acquisition
Rationale:
In radiologic imaging, "contrast" refers to the difference in density between adjacent
areas on an image, which enhances the visibility of structures.
Question 6
Which imaging modality uses magnetic fields and radio waves?
A) MRI (Magnetic Resonance Imaging). (Correct Option)
B) CT (Computed Tomography)
C) Ultrasound
D) X-ray
Rationale:
MRI (Magnetic Resonance Imaging) uses magnetic fields and radio waves to create
detailed images of the body's internal structures.
Question 7
,What is the purpose of using a grid in radiographic imaging?
A) To reduce scatter radiation and improve image contrast. (Correct Option)
B) To increase the exposure time
C) To enhance the brightness of the image
D) To measure radiation dose
Rationale:
The purpose of using a grid in radiographic imaging is to reduce scatter radiation and
improve image contrast, leading to clearer images.
Question 8
What is the unit of measurement for radiation dose?
A) Gray (Gy). (Correct Option)
B) Sievert (Sv)
C) Roentgen (R)
D) Coulomb (C)
Rationale:
The unit of measurement for radiation dose is the Gray (Gy), which quantifies the
amount of radiation energy absorbed by a material.
Question 9
Which of the following factors affects the quality of a radiographic image?
A) kVp (kilovolt peak), mAs (milliamperage-seconds), and distance. (Correct Option)
B) Film size and color
C) Room temperature and humidity
D) Patient age and gender
Rationale:
The quality of a radiographic image is affected by factors such as kVp (kilovolt peak),
mAs (milliamperage-seconds), and distance, which influence exposure and image
clarity.
Question 10
What is the role of a contrast agent in radiologic imaging?
A) To enhance the visibility of specific structures or fluids. (Correct Option)
B) To reduce radiation exposure
, C) To increase image brightness
D) To measure radiation dose
Rationale:
The role of a contrast agent in radiologic imaging is to enhance the visibility of specific
structures or fluids, improving diagnostic accuracy.
Question 11
What is the primary purpose of computed tomography (CT)?
A) To provide cross-sectional images of the body. (Correct Option)
B) To produce two-dimensional images
C) To measure radiation dose
D) To visualize soft tissue only
Rationale:
The primary purpose of computed tomography (CT) is to provide cross-sectional images
of the body, offering detailed views of internal structures.
Question 12
Which imaging technique is most commonly used for evaluating soft tissues?
A) MRI (Magnetic Resonance Imaging). (Correct Option)
B) X-ray
C) CT (Computed Tomography)
D) Ultrasound
Rationale:
MRI (Magnetic Resonance Imaging) is most commonly used for evaluating soft tissues,
providing high-resolution images without ionizing radiation.
Question 13
What is the purpose of the collimator in radiographic equipment?
A) To limit the size of the X-ray beam. (Correct Option)
B) To enhance image brightness
C) To measure radiation dose
D) To adjust exposure time
Rationale:
Edition (Bushong) | Exam Prep 2025–2026,
Comprehensive Study Guide, 200+ Practice
Questions with Verified Answers &
Rationales, Test Bank, Lecture Notes &
Review Materials for Radiology Students
Question 1
What is the primary purpose of radiologic technology?
A) To produce images of the human body for diagnostic purposes. (Correct Option)
B) To provide therapeutic treatments
C) To conduct research in radiology
D) To dispense medications
Rationale:
The primary purpose of radiologic technology is to produce images of the human body
for diagnostic purposes, aiding in the detection and treatment of medical conditions.
Question 2
What type of radiation is commonly used in X-ray imaging?
A) Ionizing radiation. (Correct Option)
B) Non-ionizing radiation
C) Radioactive radiation
D) Electromagnetic radiation
Rationale:
Ionizing radiation is commonly used in X-ray imaging, as it has enough energy to remove
tightly bound electrons from atoms, allowing for the creation of images.
Question 3
Which of the following is a key principle of radiation protection?
A) Time, distance, and shielding. (Correct Option)
B) Speed, frequency, and intensity
C) Exposure, duration, and control
D) Altitude, pressure, and temperature
Rationale:
,The key principles of radiation protection are time, distance, and shielding, which help
minimize exposure to radiation for both patients and healthcare workers.
Question 4
What is the primary function of a radiographic film?
A) To capture the image of the X-ray beam. (Correct Option)
B) To enhance the visibility of soft tissues
C) To store digital images
D) To measure radiation dose
Rationale:
The primary function of a radiographic film is to capture the image of the X-ray beam,
allowing for the visualization of internal structures.
Question 5
What does the term "contrast" refer to in radiologic imaging?
A) The difference in density between adjacent areas on an image. (Correct Option)
B) The clarity of the image
C) The color variation in the film
D) The speed of image acquisition
Rationale:
In radiologic imaging, "contrast" refers to the difference in density between adjacent
areas on an image, which enhances the visibility of structures.
Question 6
Which imaging modality uses magnetic fields and radio waves?
A) MRI (Magnetic Resonance Imaging). (Correct Option)
B) CT (Computed Tomography)
C) Ultrasound
D) X-ray
Rationale:
MRI (Magnetic Resonance Imaging) uses magnetic fields and radio waves to create
detailed images of the body's internal structures.
Question 7
,What is the purpose of using a grid in radiographic imaging?
A) To reduce scatter radiation and improve image contrast. (Correct Option)
B) To increase the exposure time
C) To enhance the brightness of the image
D) To measure radiation dose
Rationale:
The purpose of using a grid in radiographic imaging is to reduce scatter radiation and
improve image contrast, leading to clearer images.
Question 8
What is the unit of measurement for radiation dose?
A) Gray (Gy). (Correct Option)
B) Sievert (Sv)
C) Roentgen (R)
D) Coulomb (C)
Rationale:
The unit of measurement for radiation dose is the Gray (Gy), which quantifies the
amount of radiation energy absorbed by a material.
Question 9
Which of the following factors affects the quality of a radiographic image?
A) kVp (kilovolt peak), mAs (milliamperage-seconds), and distance. (Correct Option)
B) Film size and color
C) Room temperature and humidity
D) Patient age and gender
Rationale:
The quality of a radiographic image is affected by factors such as kVp (kilovolt peak),
mAs (milliamperage-seconds), and distance, which influence exposure and image
clarity.
Question 10
What is the role of a contrast agent in radiologic imaging?
A) To enhance the visibility of specific structures or fluids. (Correct Option)
B) To reduce radiation exposure
, C) To increase image brightness
D) To measure radiation dose
Rationale:
The role of a contrast agent in radiologic imaging is to enhance the visibility of specific
structures or fluids, improving diagnostic accuracy.
Question 11
What is the primary purpose of computed tomography (CT)?
A) To provide cross-sectional images of the body. (Correct Option)
B) To produce two-dimensional images
C) To measure radiation dose
D) To visualize soft tissue only
Rationale:
The primary purpose of computed tomography (CT) is to provide cross-sectional images
of the body, offering detailed views of internal structures.
Question 12
Which imaging technique is most commonly used for evaluating soft tissues?
A) MRI (Magnetic Resonance Imaging). (Correct Option)
B) X-ray
C) CT (Computed Tomography)
D) Ultrasound
Rationale:
MRI (Magnetic Resonance Imaging) is most commonly used for evaluating soft tissues,
providing high-resolution images without ionizing radiation.
Question 13
What is the purpose of the collimator in radiographic equipment?
A) To limit the size of the X-ray beam. (Correct Option)
B) To enhance image brightness
C) To measure radiation dose
D) To adjust exposure time
Rationale:
