ARRT SAFETY REVIEW EXAM QUESTIONS
AND ANSWERS
Which cell types have the lowest radiosensitivity:
nerve cells
muscle cells
spermatids
lymphocytes -
correct answer ✅nerve cells (except in fetal life, they are highly
radiosensitive)
Which cells are the most radiosensitive in the body -
correct answer ✅lymphocytes
Which interaction between x-ray photons and matter involves a
high energy photon and the ejection of an outer shell electron?
photoelectric effect
coherent scatter
Compton scatter
pair produciton -
correct answer ✅Compton scatter
What is likely to occur if 250 mGy is accidentally delivered to a
recently fertilized ovum?
,ARRT SAFETY REVIEW EXAM QUESTIONS
AND ANSWERS
Skeletal anomalies
CNS anomalies
Spontaneous abortion
Childhood malignancy -
correct answer ✅spontaneous abortion
Primary radiation barriers include: -
correct answer ✅walls, doors, floors
secondary radiation barriers include -
correct answer ✅lead aprons, lead gloves, thyroid shields, ceiling
In which of the following examinations would an IR front having
very low absorption properties be especially important?
Abdominal radiography
Extremity radiography
Angiography
Mammography -
correct answer ✅mammography
,ARRT SAFETY REVIEW EXAM QUESTIONS
AND ANSWERS
The most radiosensitive portion of the GI tract is -
correct answer ✅small bowel
Which of the following has (have) an effect on the amount and type
of radiation-induced tissue damage?
Quality of radiation
Type of tissue being irradiated
Fractionation
a. 1 only
b. 1 and 2
c. 1 and 3
d. all 3 -
correct answer ✅all 3
How is the intensity of an x-ray photon affected after each time it
scatters?
Its intensity increases 4 times.
Its intensity increases 1000 times.
Its intensity decreases 4 times.
, ARRT SAFETY REVIEW EXAM QUESTIONS
AND ANSWERS
Its intensity decreases 1000 times. -
correct answer ✅its intensity decreases 1000 times
breaks the DNA molecule into two or more pieces. -
correct answer ✅main-chain scission
incorrect joining of broken DNA fragments. -
correct answer ✅cross-linking
the disruption of a single chemical bond as a result of irradiation. -
correct answer ✅point lesion
Irradiation of macromolecules in vitro can result in
main-chain scission
cross-linking
point lesions
a. 1 only
b. 1 and 2
c. 2 and 3
AND ANSWERS
Which cell types have the lowest radiosensitivity:
nerve cells
muscle cells
spermatids
lymphocytes -
correct answer ✅nerve cells (except in fetal life, they are highly
radiosensitive)
Which cells are the most radiosensitive in the body -
correct answer ✅lymphocytes
Which interaction between x-ray photons and matter involves a
high energy photon and the ejection of an outer shell electron?
photoelectric effect
coherent scatter
Compton scatter
pair produciton -
correct answer ✅Compton scatter
What is likely to occur if 250 mGy is accidentally delivered to a
recently fertilized ovum?
,ARRT SAFETY REVIEW EXAM QUESTIONS
AND ANSWERS
Skeletal anomalies
CNS anomalies
Spontaneous abortion
Childhood malignancy -
correct answer ✅spontaneous abortion
Primary radiation barriers include: -
correct answer ✅walls, doors, floors
secondary radiation barriers include -
correct answer ✅lead aprons, lead gloves, thyroid shields, ceiling
In which of the following examinations would an IR front having
very low absorption properties be especially important?
Abdominal radiography
Extremity radiography
Angiography
Mammography -
correct answer ✅mammography
,ARRT SAFETY REVIEW EXAM QUESTIONS
AND ANSWERS
The most radiosensitive portion of the GI tract is -
correct answer ✅small bowel
Which of the following has (have) an effect on the amount and type
of radiation-induced tissue damage?
Quality of radiation
Type of tissue being irradiated
Fractionation
a. 1 only
b. 1 and 2
c. 1 and 3
d. all 3 -
correct answer ✅all 3
How is the intensity of an x-ray photon affected after each time it
scatters?
Its intensity increases 4 times.
Its intensity increases 1000 times.
Its intensity decreases 4 times.
, ARRT SAFETY REVIEW EXAM QUESTIONS
AND ANSWERS
Its intensity decreases 1000 times. -
correct answer ✅its intensity decreases 1000 times
breaks the DNA molecule into two or more pieces. -
correct answer ✅main-chain scission
incorrect joining of broken DNA fragments. -
correct answer ✅cross-linking
the disruption of a single chemical bond as a result of irradiation. -
correct answer ✅point lesion
Irradiation of macromolecules in vitro can result in
main-chain scission
cross-linking
point lesions
a. 1 only
b. 1 and 2
c. 2 and 3
