Page |1
Comprehensive CT Radiation Safety and
Protocols for Technologists Questions and
Correct Answers/ Latest Update / Already
Graded
What is the primary goal of a CT technologist?
Ans: To obtain the best possible images while keeping the
patient safe from unnecessary radiation.
What does the acronym ALARA stand for?
Ans: As Low As Reasonably Achievable, a principle to minimize
radiation exposure.
What is the first task in protecting patients from unnecessary radiation
exposure?
Ans: Understanding how to measure patient dose.
What unit measures the amount of radiation absorbed by an
individual?
Ans: Rad or rem.
What has replaced the rad in the International System of Units?
All rights reserved © 2025/ 2026 |
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Ans: Gray (Gy).
What has replaced the rem in the International System of Units?
Ans: Sievert (Sv).
What does CTDI stand for?
Ans: CT Dose Index.
What is the purpose of the CTDIvol?
Ans: To compute patient dose from a spiral scan.
What is the DLP in CT?
Ans: Dose Length Product, which approximates the actual
radiation dose to a specific patient.
How is the DLP calculated?
Ans: DLP = CTDIvol x scan length.
What is MSAD?
All rights reserved © 2025/ 2026 |
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Ans: Multiple Scan Average Dose, the average dose per slice
during a CT scan.
What is the significance of proper patient positioning in CT?
Ans: It reduces radiation dose and minimizes image noise.
What should a technologist inquire about to reduce motion artifact?
Ans: Patient education on staying still and following breathing
instructions.
What is a key consideration when using shielding in CT?
Ans: A misaligned shield could allow x-ray photons to scatter,
potentially causing harm.
What is the role of the physicist in determining patient dose?
Ans: The physicist is responsible for accurately approximating
true patient dose.
What is the importance of understanding facility protocols?
Ans: It helps technologists inform physicians about the
appropriate tests for patients.
All rights reserved © 2025/ 2026 |
Comprehensive CT Radiation Safety and
Protocols for Technologists Questions and
Correct Answers/ Latest Update / Already
Graded
What is the primary goal of a CT technologist?
Ans: To obtain the best possible images while keeping the
patient safe from unnecessary radiation.
What does the acronym ALARA stand for?
Ans: As Low As Reasonably Achievable, a principle to minimize
radiation exposure.
What is the first task in protecting patients from unnecessary radiation
exposure?
Ans: Understanding how to measure patient dose.
What unit measures the amount of radiation absorbed by an
individual?
Ans: Rad or rem.
What has replaced the rad in the International System of Units?
All rights reserved © 2025/ 2026 |
, Page |2
Ans: Gray (Gy).
What has replaced the rem in the International System of Units?
Ans: Sievert (Sv).
What does CTDI stand for?
Ans: CT Dose Index.
What is the purpose of the CTDIvol?
Ans: To compute patient dose from a spiral scan.
What is the DLP in CT?
Ans: Dose Length Product, which approximates the actual
radiation dose to a specific patient.
How is the DLP calculated?
Ans: DLP = CTDIvol x scan length.
What is MSAD?
All rights reserved © 2025/ 2026 |
, Page |3
Ans: Multiple Scan Average Dose, the average dose per slice
during a CT scan.
What is the significance of proper patient positioning in CT?
Ans: It reduces radiation dose and minimizes image noise.
What should a technologist inquire about to reduce motion artifact?
Ans: Patient education on staying still and following breathing
instructions.
What is a key consideration when using shielding in CT?
Ans: A misaligned shield could allow x-ray photons to scatter,
potentially causing harm.
What is the role of the physicist in determining patient dose?
Ans: The physicist is responsible for accurately approximating
true patient dose.
What is the importance of understanding facility protocols?
Ans: It helps technologists inform physicians about the
appropriate tests for patients.
All rights reserved © 2025/ 2026 |
