Radiation Safety and Radiobiology in
Medical iMaging (10th ed) Statkiewicz
SheReR - coMplete teSt bank | 200+ VeRified
Q&a with RationaleS | chapteRS 1-16
coMplete guide updated 2026
Ace your ARRT and Radiologic Technology exams with the verified Test Bank for Radiation
Safety and Radiobiology, 10th Edition by Statkiewicz Sherer and Visconti. This comprehensive
guide includes 200+ multiple-choice questions covering all 16 chapters, including ALARA, cell
response, dose limits, and equipment safety. Each question features bolded correct answers
and detailed rationales to master the "why" behind every concept. Perfect for students and
registry prep. Updated for 2026!
Introduction to Radiation Protection & Radiobiology (1–15)
1. Which of the following is the most common unit used to measure the quantity of
radiation that causes biological damage in humans for protection purposes?
A. Air kerma
B. Equivalent dose (EqD)
C. Exposure
D. Absorbed dose
Rationale: Equivalent dose (EqD) accounts for the type of radiation and its specific
effectiveness in causing biological damage, which is essential for monitoring human
exposure.
2. According to the ALARA principle, which of the following is the primary responsibility of
the radiologic technologist?
A. To perform the exam as quickly as possible, regardless of technique.
B. To keep radiation exposure to the patient and staff at the lowest levels possible.
C. To use the highest mAs possible to ensure image quality.
D. To ignore shield use if it slows down the procedure.
Rationale: ALARA stands for "As Low As Reasonably Achievable," meaning all
exposure must be minimized through the use of time, distance, and shielding.
3. In the context of the Inverse Square Law, if a technologist doubles their distance from a
radiation source, the intensity of the radiation beam is:
, A. Doubled
B. Reduced by half
C. Reduced to one-fourth of its original intensity
D. Quadrupled
Rationale: The intensity of radiation is inversely proportional to the square of the
distance. Doubling the distance (2²) means the intensity becomes 1/4th.
4. Which type of interaction between x-ray photons and matter is most responsible for the
absorbed dose received by the patient?
A. Compton scattering
B. Photoelectric absorption
C. Pair production
D. Coherent scattering
Rationale: Photoelectric absorption occurs when the x-ray photon's energy is
completely absorbed by an inner-shell electron, contributing directly to patient dose.
5. The term "Linear Energy Transfer" (LET) refers to the rate at which radiation:
A. Travels through a vacuum
B. Deposits energy per unit length of track in tissue
C. Increases the temperature of the target
D. Is filtered by aluminum
Rationale: LET is a measure of radiation quality; high-LET radiation (like alpha) causes
more dense ionization and damage than low-LET radiation (like x-rays).
6. Which of the following cells is considered the most radiosensitive according to the Law
of Bergonié and Tribondeau?
A. Muscle cells
B. Nerve cells
C. Lymphocytes
D. Mature bone cells
Rationale: Lymphocytes are highly undifferentiated, rapidly dividing, and have a high
metabolic rate, making them the most radiosensitive cells.
7. A "deterministic" (non-stochastic) effect of radiation is one that:
A. Occurs randomly with no threshold
B. Has a threshold dose below which the effect is not observed
C. Only occurs 20 years after exposure
D. Is impossible to predict
Rationale: Deterministic effects (like skin erythema) only occur after a specific
threshold dose is reached; severity increases as dose increases.
,8. Which of the following is considered a "stochastic" (probabilistic) effect of radiation?
A. Sterility
B. Cancer
C. Acute radiation syndrome
D. Organ atrophy
Rationale: Stochastic effects are random and have no threshold; any dose increases
the probability of an effect like cancer or genetic mutations.
9. The BERT (Background Equivalent Radiation Time) method is used primarily to:
A. Scare patients about radiation
B. Compare radiation from a procedure to natural background radiation
C. Measure the exact amount of x-rays in the room
D. Calculate the technologist's annual limit
Rationale: BERT is a communication tool used to ease patient anxiety by explaining
dose in terms of "days/months of natural background exposure."
10. What is the annual occupational effective dose (EfD) limit for a radiologic technologist?
A. 1 mSv
B. 5 mSv
C. 50 mSv
D. 500 mSv
Rationale: The NCRP recommends a 50 mSv annual limit to ensure long-term safety for
radiation workers.
11. Which factor is most important in protecting the technologist from scatter radiation
during fluoroscopy?
A. Wearing a thyroid shield
B. Standing as far away from the patient as is practical
C. Increasing the kVp
D. Decreasing the filtration
Rationale: Distance is the most effective protection against scatter. According to the
Inverse Square Law, increasing distance drastically reduces exposure.
12. Which of the following defines the "absorbed dose" (D)?
A. The number of ions produced in air
B. The amount of energy per unit mass absorbed by an irradiated object
C. The potential for genetic damage
D. The intensity of the primary beam
Rationale: Absorbed dose is measured in grays (Gy) and refers specifically to the
energy deposited into the material (patient tissue).
, 13. Which interaction results in a "scattered" photon with less energy than the incident
photon?
A. Photoelectric effect
B. Compton interaction
C. Coherent scattering
D. Photodisintegration
Rationale: In Compton scattering, the photon strikes an outer-shell electron, losing
energy and changing direction.
14. What is the cumulative effective dose (CumEfD) limit for a 40-year-old radiographer?
A. 40 mSv
B. 400 mSv
C. 50 mSv
D. 4000 mSv
Rationale: CumEfD is calculated by multiplying the worker's age by 10 mSv (Age × 10
mSv).
15. Which of the following is considered "Low-LET" radiation?
A. Alpha particles
B. Fast neutrons
C. X-rays and gamma rays
D. Protons
Rationale: Electromagnetic radiations like x-rays do not deposit energy as densely as
particulate radiations (High-LET).
Biological Effects & Radiation Interactions (16–35)
16. The Relative Biological Effectiveness (RBE) of a type of radiation is directly related to its:
A. Velocity
B. Linear Energy Transfer (LET)
C. Half-life
D. Frequency
Rationale: As LET increases, the ability of radiation to cause biological damage (RBE)
also increases.
17. Which cellular component is considered the "master molecule" or primary target for
radiation damage?
A. Mitochondria
B. Cell membrane
Medical iMaging (10th ed) Statkiewicz
SheReR - coMplete teSt bank | 200+ VeRified
Q&a with RationaleS | chapteRS 1-16
coMplete guide updated 2026
Ace your ARRT and Radiologic Technology exams with the verified Test Bank for Radiation
Safety and Radiobiology, 10th Edition by Statkiewicz Sherer and Visconti. This comprehensive
guide includes 200+ multiple-choice questions covering all 16 chapters, including ALARA, cell
response, dose limits, and equipment safety. Each question features bolded correct answers
and detailed rationales to master the "why" behind every concept. Perfect for students and
registry prep. Updated for 2026!
Introduction to Radiation Protection & Radiobiology (1–15)
1. Which of the following is the most common unit used to measure the quantity of
radiation that causes biological damage in humans for protection purposes?
A. Air kerma
B. Equivalent dose (EqD)
C. Exposure
D. Absorbed dose
Rationale: Equivalent dose (EqD) accounts for the type of radiation and its specific
effectiveness in causing biological damage, which is essential for monitoring human
exposure.
2. According to the ALARA principle, which of the following is the primary responsibility of
the radiologic technologist?
A. To perform the exam as quickly as possible, regardless of technique.
B. To keep radiation exposure to the patient and staff at the lowest levels possible.
C. To use the highest mAs possible to ensure image quality.
D. To ignore shield use if it slows down the procedure.
Rationale: ALARA stands for "As Low As Reasonably Achievable," meaning all
exposure must be minimized through the use of time, distance, and shielding.
3. In the context of the Inverse Square Law, if a technologist doubles their distance from a
radiation source, the intensity of the radiation beam is:
, A. Doubled
B. Reduced by half
C. Reduced to one-fourth of its original intensity
D. Quadrupled
Rationale: The intensity of radiation is inversely proportional to the square of the
distance. Doubling the distance (2²) means the intensity becomes 1/4th.
4. Which type of interaction between x-ray photons and matter is most responsible for the
absorbed dose received by the patient?
A. Compton scattering
B. Photoelectric absorption
C. Pair production
D. Coherent scattering
Rationale: Photoelectric absorption occurs when the x-ray photon's energy is
completely absorbed by an inner-shell electron, contributing directly to patient dose.
5. The term "Linear Energy Transfer" (LET) refers to the rate at which radiation:
A. Travels through a vacuum
B. Deposits energy per unit length of track in tissue
C. Increases the temperature of the target
D. Is filtered by aluminum
Rationale: LET is a measure of radiation quality; high-LET radiation (like alpha) causes
more dense ionization and damage than low-LET radiation (like x-rays).
6. Which of the following cells is considered the most radiosensitive according to the Law
of Bergonié and Tribondeau?
A. Muscle cells
B. Nerve cells
C. Lymphocytes
D. Mature bone cells
Rationale: Lymphocytes are highly undifferentiated, rapidly dividing, and have a high
metabolic rate, making them the most radiosensitive cells.
7. A "deterministic" (non-stochastic) effect of radiation is one that:
A. Occurs randomly with no threshold
B. Has a threshold dose below which the effect is not observed
C. Only occurs 20 years after exposure
D. Is impossible to predict
Rationale: Deterministic effects (like skin erythema) only occur after a specific
threshold dose is reached; severity increases as dose increases.
,8. Which of the following is considered a "stochastic" (probabilistic) effect of radiation?
A. Sterility
B. Cancer
C. Acute radiation syndrome
D. Organ atrophy
Rationale: Stochastic effects are random and have no threshold; any dose increases
the probability of an effect like cancer or genetic mutations.
9. The BERT (Background Equivalent Radiation Time) method is used primarily to:
A. Scare patients about radiation
B. Compare radiation from a procedure to natural background radiation
C. Measure the exact amount of x-rays in the room
D. Calculate the technologist's annual limit
Rationale: BERT is a communication tool used to ease patient anxiety by explaining
dose in terms of "days/months of natural background exposure."
10. What is the annual occupational effective dose (EfD) limit for a radiologic technologist?
A. 1 mSv
B. 5 mSv
C. 50 mSv
D. 500 mSv
Rationale: The NCRP recommends a 50 mSv annual limit to ensure long-term safety for
radiation workers.
11. Which factor is most important in protecting the technologist from scatter radiation
during fluoroscopy?
A. Wearing a thyroid shield
B. Standing as far away from the patient as is practical
C. Increasing the kVp
D. Decreasing the filtration
Rationale: Distance is the most effective protection against scatter. According to the
Inverse Square Law, increasing distance drastically reduces exposure.
12. Which of the following defines the "absorbed dose" (D)?
A. The number of ions produced in air
B. The amount of energy per unit mass absorbed by an irradiated object
C. The potential for genetic damage
D. The intensity of the primary beam
Rationale: Absorbed dose is measured in grays (Gy) and refers specifically to the
energy deposited into the material (patient tissue).
, 13. Which interaction results in a "scattered" photon with less energy than the incident
photon?
A. Photoelectric effect
B. Compton interaction
C. Coherent scattering
D. Photodisintegration
Rationale: In Compton scattering, the photon strikes an outer-shell electron, losing
energy and changing direction.
14. What is the cumulative effective dose (CumEfD) limit for a 40-year-old radiographer?
A. 40 mSv
B. 400 mSv
C. 50 mSv
D. 4000 mSv
Rationale: CumEfD is calculated by multiplying the worker's age by 10 mSv (Age × 10
mSv).
15. Which of the following is considered "Low-LET" radiation?
A. Alpha particles
B. Fast neutrons
C. X-rays and gamma rays
D. Protons
Rationale: Electromagnetic radiations like x-rays do not deposit energy as densely as
particulate radiations (High-LET).
Biological Effects & Radiation Interactions (16–35)
16. The Relative Biological Effectiveness (RBE) of a type of radiation is directly related to its:
A. Velocity
B. Linear Energy Transfer (LET)
C. Half-life
D. Frequency
Rationale: As LET increases, the ability of radiation to cause biological damage (RBE)
also increases.
17. Which cellular component is considered the "master molecule" or primary target for
radiation damage?
A. Mitochondria
B. Cell membrane
