RADIATION SAFETY AND RADIOBIOLOGY IN
MEDICAL IMAGING ACTUAL TEST 2026
VERIFIED QUESTIONS AND ANSWERS
COMPREHENSIVE STUDY GUIDE
◉ The millisievert (mSv) is equal to
a. 1/10 of a sievert.
b. 1/100 of a sievert.
c. 1/1000 of a sievert.
d. 1/10,000 of a sievert.
Answer: C. 1/1000 of a sievert
◉ Which of the following provides the basis for determining
whether an imaging procedure or practice is justified?
a. ALARA concept
b. BERT method
c. Diagnostic efficacy
d. NEXT program.
Answer: C. Diagnostic Efficacy
,◉ Which of the following radiation quantities is intended to be the
best overall measure of the biologic effects of ionizing radiation?
a. Exposure
b. Effective dose
c. Absorbed dose
d. There is no radiation quantity that is intended to be the best
overall measure of the biologic effects of ionizing radiation..
Answer: B. Effective Dose
◉ Which of the following statements below is true?
a. It appears that no safe dose level exists for radiation-induced
malignant disease.
b. The ALARA principle establishes a dose level for radiation-
induced malignancy.
c. The BERT method establishes a dose level for radiation-induced
malignancy.
d. The NEXT program and reference values establish a dose level for
radiation-induced malignancy..
Answer: A. It appears that no safe dose level exists for radiation-
induced malignant disease.
◉ Electromagnetic radiation travels or propagates through space in
the form of a wave but can interact with matter as a particle of
energy called a photon. This dual nature is referred to as
,a. wave attenuation capability.
b. wave-particle interchange ability.
c. wave-particle duality.
d. wave-particle phenomena..
Answer: C
◉ Which of the following statements concerning the 1979 nuclear
reactor accident at TMI-2 is not true?
a. Many excess cancer deaths have been predicted to occur in the 2
million people living within 50 miles of the plant at the time of the
accident.
b. During the time of the accident, if persons living within a 100-mile
radius of the nuclear power plant received an average radiation
exposure of 15 microgray, and this dose is used as the population
dose, then no more than two additional resulting cancer deaths can
be predicted in the exposed inhabitants as a consequence of
radiation exposure.
c. The average dose received by the exposed population living within
a 50-mile radius of the TMI nuclear power station at the time of the
accident was determined to be 0.08 mSv, which is well below the
average annual background level.
d. No melt-through of the reactor vessel resulted during the
accident..
Answer: A
, ◉ Terrestrial radiation includes which of the following sources?
a. Long-lived radioactive elements such as uranium-238, radium-
226, and
thorium-232 that are present in variable quantities in the crust of
the earth
b. Radioactive fallout from nuclear weapons tests in which
detonation occurred
above ground
c. The sun and beyond the solar system
d. Airport surveillance systems and electron microscopes.
Answer: A
◉ When exposed to high radon levels in the home, which of the
following groups of people have the highest risk of developing lung
cancer?
a. Teenagers
b. Adults from 20 to 30 years of age
c. Nonsmokers
d. Smokers.
Answer: D
◉ In the electromagnetic spectrum, higher frequencies are
associated with
MEDICAL IMAGING ACTUAL TEST 2026
VERIFIED QUESTIONS AND ANSWERS
COMPREHENSIVE STUDY GUIDE
◉ The millisievert (mSv) is equal to
a. 1/10 of a sievert.
b. 1/100 of a sievert.
c. 1/1000 of a sievert.
d. 1/10,000 of a sievert.
Answer: C. 1/1000 of a sievert
◉ Which of the following provides the basis for determining
whether an imaging procedure or practice is justified?
a. ALARA concept
b. BERT method
c. Diagnostic efficacy
d. NEXT program.
Answer: C. Diagnostic Efficacy
,◉ Which of the following radiation quantities is intended to be the
best overall measure of the biologic effects of ionizing radiation?
a. Exposure
b. Effective dose
c. Absorbed dose
d. There is no radiation quantity that is intended to be the best
overall measure of the biologic effects of ionizing radiation..
Answer: B. Effective Dose
◉ Which of the following statements below is true?
a. It appears that no safe dose level exists for radiation-induced
malignant disease.
b. The ALARA principle establishes a dose level for radiation-
induced malignancy.
c. The BERT method establishes a dose level for radiation-induced
malignancy.
d. The NEXT program and reference values establish a dose level for
radiation-induced malignancy..
Answer: A. It appears that no safe dose level exists for radiation-
induced malignant disease.
◉ Electromagnetic radiation travels or propagates through space in
the form of a wave but can interact with matter as a particle of
energy called a photon. This dual nature is referred to as
,a. wave attenuation capability.
b. wave-particle interchange ability.
c. wave-particle duality.
d. wave-particle phenomena..
Answer: C
◉ Which of the following statements concerning the 1979 nuclear
reactor accident at TMI-2 is not true?
a. Many excess cancer deaths have been predicted to occur in the 2
million people living within 50 miles of the plant at the time of the
accident.
b. During the time of the accident, if persons living within a 100-mile
radius of the nuclear power plant received an average radiation
exposure of 15 microgray, and this dose is used as the population
dose, then no more than two additional resulting cancer deaths can
be predicted in the exposed inhabitants as a consequence of
radiation exposure.
c. The average dose received by the exposed population living within
a 50-mile radius of the TMI nuclear power station at the time of the
accident was determined to be 0.08 mSv, which is well below the
average annual background level.
d. No melt-through of the reactor vessel resulted during the
accident..
Answer: A
, ◉ Terrestrial radiation includes which of the following sources?
a. Long-lived radioactive elements such as uranium-238, radium-
226, and
thorium-232 that are present in variable quantities in the crust of
the earth
b. Radioactive fallout from nuclear weapons tests in which
detonation occurred
above ground
c. The sun and beyond the solar system
d. Airport surveillance systems and electron microscopes.
Answer: A
◉ When exposed to high radon levels in the home, which of the
following groups of people have the highest risk of developing lung
cancer?
a. Teenagers
b. Adults from 20 to 30 years of age
c. Nonsmokers
d. Smokers.
Answer: D
◉ In the electromagnetic spectrum, higher frequencies are
associated with
