ARRT SAFETY TIPS SET ANSWERS AND QUESTIONS
SET A+
✔✔represents the relative tissue radiosensitivity of irradiated material (e.g., muscle vs.
intestinal epithelium vs. bone). - ✔✔tissue weighting factor
✔✔is a number assigned to different types of ionizing radiations in order to better
determine their effect on tissue (e.g., x-ray vs. alpha particles). - ✔✔radiation weighting
factor
✔✔If a quantity of radiation is delivered to a body over a short period of time, its effect
will be greater than if it were delivered over a long period of time.
depends solely on the distance factor.
has no relation to how it is delivered in time.
depends solely on the radiation quantity. - ✔✔will be greater if delivered over long
period of time
✔✔Aluminum filtration has its greatest effect on
low-energy x-ray photons
high-energy x-ray photons
low-energy scattered photons
high-energy scattered photons - ✔✔low-energy xray photons
✔✔If a patient received 0.02 Gy during a 10-minute fluoroscopic examination, what was
the dose rate?
0.2 mGy/min
2.0 mGy/min
5 mGy/min
200 mGy/min - ✔✔2 mGy/min
✔✔The interaction between x-ray photons and tissue that contributes to radiographic
contrast but that contributes significantly to patient dose is
the photoelectric effect
, Compton scatter
coherent scatter
pair production - ✔✔photoelectric effect
✔✔no threshold. Even one x-ray photon theoretically can cause a response. It is a
straight (linear) line, indicating that response is proportional to dose; as dose increases,
response increases. Radiation-induced cancer, leukemia, and genetic effects follow a
linear nonthreshold dose-response relationship. - ✔✔
✔✔The x-ray unit of exposure defines which of the following?
Sievert
air kerma
Gyt
Becqueral - ✔✔air kerma
✔✔The total number of x-ray photons produced at the target is contingent on the
tube current
target material
square of the kilovoltage
1 only
1 and 2 only
2 and 3 only
1, 2, and 3 - ✔✔all 3
✔✔The measure of the rate at which energy is transferred from ionizing radiation to soft
tissue is termed
the characteristic effect
Compton scatter
linear energy transfer
the photoelectric effect - ✔✔linear energy transfer
✔✔The annual dose limit for occupationally exposed individuals is valid for
alpha, beta, and x-radiations
x- and gamma radiations only
beta, x-, and gamma radiations
all ionizing radiations - ✔✔beta, x, and gamma radiation
✔✔Which of the following groups of exposure factors will deliver the least patient dose?
300 mA, 250 ms, 70 kVp
300 mA, 125 ms, 80 kVp
400 mA, 90 ms, 80 kVp
600 mA, 30 ms, 90 kVp - ✔✔600 mA, 30 ms, 90 kVp
✔✔Occupational exposure received by the radiographer is mostly from
SET A+
✔✔represents the relative tissue radiosensitivity of irradiated material (e.g., muscle vs.
intestinal epithelium vs. bone). - ✔✔tissue weighting factor
✔✔is a number assigned to different types of ionizing radiations in order to better
determine their effect on tissue (e.g., x-ray vs. alpha particles). - ✔✔radiation weighting
factor
✔✔If a quantity of radiation is delivered to a body over a short period of time, its effect
will be greater than if it were delivered over a long period of time.
depends solely on the distance factor.
has no relation to how it is delivered in time.
depends solely on the radiation quantity. - ✔✔will be greater if delivered over long
period of time
✔✔Aluminum filtration has its greatest effect on
low-energy x-ray photons
high-energy x-ray photons
low-energy scattered photons
high-energy scattered photons - ✔✔low-energy xray photons
✔✔If a patient received 0.02 Gy during a 10-minute fluoroscopic examination, what was
the dose rate?
0.2 mGy/min
2.0 mGy/min
5 mGy/min
200 mGy/min - ✔✔2 mGy/min
✔✔The interaction between x-ray photons and tissue that contributes to radiographic
contrast but that contributes significantly to patient dose is
the photoelectric effect
, Compton scatter
coherent scatter
pair production - ✔✔photoelectric effect
✔✔no threshold. Even one x-ray photon theoretically can cause a response. It is a
straight (linear) line, indicating that response is proportional to dose; as dose increases,
response increases. Radiation-induced cancer, leukemia, and genetic effects follow a
linear nonthreshold dose-response relationship. - ✔✔
✔✔The x-ray unit of exposure defines which of the following?
Sievert
air kerma
Gyt
Becqueral - ✔✔air kerma
✔✔The total number of x-ray photons produced at the target is contingent on the
tube current
target material
square of the kilovoltage
1 only
1 and 2 only
2 and 3 only
1, 2, and 3 - ✔✔all 3
✔✔The measure of the rate at which energy is transferred from ionizing radiation to soft
tissue is termed
the characteristic effect
Compton scatter
linear energy transfer
the photoelectric effect - ✔✔linear energy transfer
✔✔The annual dose limit for occupationally exposed individuals is valid for
alpha, beta, and x-radiations
x- and gamma radiations only
beta, x-, and gamma radiations
all ionizing radiations - ✔✔beta, x, and gamma radiation
✔✔Which of the following groups of exposure factors will deliver the least patient dose?
300 mA, 250 ms, 70 kVp
300 mA, 125 ms, 80 kVp
400 mA, 90 ms, 80 kVp
600 mA, 30 ms, 90 kVp - ✔✔600 mA, 30 ms, 90 kVp
✔✔Occupational exposure received by the radiographer is mostly from
