ARRT Radiography Certification Exam
2025. Verified Latest Update Questions
and Answers. Complete A+ Update.
Ionizing Radiation - CORRECT ANSWER >>radiation that is able to remove
electrons from an atom through ionization
Somatic effects - CORRECT ANSWER >>refers to the effects of radiation to the
body being irradiated
Genetic Effects - CORRECT ANSWER >>refers to effects of radiation to a germ
cell's genetic code; effects the next generation
Primary radiation - CORRECT ANSWER >>radiation exiting the x-ray tube
Remnant radiation (or Exit Radiation) - CORRECT ANSWER >>x-rays the leave
the patient and strike the image receptor
attenuation - CORRECT ANSWER >>absorption and scatter of the x-ray beam as
it passes through the patient
heterogenous beam - CORRECT ANSWER >>x-ray beam that has photons of
many different energies
photoelectric effect - CORRECT ANSWER >>absorption of x-ray photons in the
body
Compton effect - CORRECT ANSWER >>scatter of x-ray photons in the body
air kerma - CORRECT ANSWER >>unit of exposure
gray - CORRECT ANSWER >>unit of absorbed dose
gray(a) - CORRECT ANSWER >>unit of radiation absorbed in air
,gray(t) - CORRECT ANSWER >>unit of radiation absorbed in tissue
sievert - CORRECT ANSWER >>unit of effective dose or unit of equivalent dose
becquerel - CORRECT ANSWER >>unit of activity
uncontrolled area - CORRECT ANSWER >>general public area, like waiting room
or stairways
controlled area - CORRECT ANSWER >>occupied by people trained in radiation
safety and wear radiation badges/monitors
x-ray tube leakage may not exceed what? - CORRECT ANSWER >>1mGy(a) per
hour at a distance of 1 meter from the housing
minimum lead equivalent for fluoro curtain - CORRECT ANSWER >>0.25mm
minimum lead equivalent for bucky slot shield - CORRECT ANSWER >>0.25mm
NAS or NRC-BEIR - CORRECT ANSWER >>National Academy of
Sciences/National Research Counsel on the Biological Effects of Ionizing
Radiation
studies biologic effects of ionizing radiation and publishes the data
NCRP - CORRECT ANSWER >>National Counsel on Radiation Protection
publishes radiation protection guidelines for the US
NRC - CORRECT ANSWER >>Nuclear Regulatory Commission
enforces radiation protection standards at the federal level
, NCRP Report number 102 - CORRECT ANSWER >>makes recommendations on
equipment design and protection regarding lead shielding and fluoro and mobile
exposure rates
NCRP Report number 116 - CORRECT ANSWER >>makes recommendations
pertaining to risk-benefit analysis of radiation exposure; states genetic and
somatic effects need to be kept to a minimum; makes annual dose limits
NCRP number 160 - CORRECT ANSWER >>addresses radiation exposure from
all sources to people in the US
effective dose limit - CORRECT ANSWER >>upper boundary dose that can be
absorbed (either in a single exposure or annually) with negligible risk of genetic
or somatic effects to the individual
cumulative effective dose - CORRECT ANSWER >>lifetime occupational
exposure must not exceed radiographer's age x 10 mSv
equivalent dose - CORRECT ANSWER >>equal to the absorbed dose multiplied
by the radiation weighting factor
equivalent dose limit - CORRECT ANSWER >>upper boundary dose that can be
absorbed (either in a single exposure or annually) with negligible risk of
deterministic effect
Dose Area Product (DAP) - CORRECT ANSWER >>total air kerma striking the
patient
probabilistic effects (stochastic) - CORRECT ANSWER >>randomly occurring
effects of radiation; probability is proportional to the dose (increased dose =
increased probability)
Deterministic Effects - CORRECT ANSWER >>radiation effects that become
more severe at higher levels of radiation exposure; do not occur below a certain
threshold
GSD (Genetically Significant Dose) - CORRECT ANSWER >>average annual
gonadal dose of radiation to individuals of childbearing age; addresses the
relationship of gonadal doses to individuals versus an entire population and the
2025. Verified Latest Update Questions
and Answers. Complete A+ Update.
Ionizing Radiation - CORRECT ANSWER >>radiation that is able to remove
electrons from an atom through ionization
Somatic effects - CORRECT ANSWER >>refers to the effects of radiation to the
body being irradiated
Genetic Effects - CORRECT ANSWER >>refers to effects of radiation to a germ
cell's genetic code; effects the next generation
Primary radiation - CORRECT ANSWER >>radiation exiting the x-ray tube
Remnant radiation (or Exit Radiation) - CORRECT ANSWER >>x-rays the leave
the patient and strike the image receptor
attenuation - CORRECT ANSWER >>absorption and scatter of the x-ray beam as
it passes through the patient
heterogenous beam - CORRECT ANSWER >>x-ray beam that has photons of
many different energies
photoelectric effect - CORRECT ANSWER >>absorption of x-ray photons in the
body
Compton effect - CORRECT ANSWER >>scatter of x-ray photons in the body
air kerma - CORRECT ANSWER >>unit of exposure
gray - CORRECT ANSWER >>unit of absorbed dose
gray(a) - CORRECT ANSWER >>unit of radiation absorbed in air
,gray(t) - CORRECT ANSWER >>unit of radiation absorbed in tissue
sievert - CORRECT ANSWER >>unit of effective dose or unit of equivalent dose
becquerel - CORRECT ANSWER >>unit of activity
uncontrolled area - CORRECT ANSWER >>general public area, like waiting room
or stairways
controlled area - CORRECT ANSWER >>occupied by people trained in radiation
safety and wear radiation badges/monitors
x-ray tube leakage may not exceed what? - CORRECT ANSWER >>1mGy(a) per
hour at a distance of 1 meter from the housing
minimum lead equivalent for fluoro curtain - CORRECT ANSWER >>0.25mm
minimum lead equivalent for bucky slot shield - CORRECT ANSWER >>0.25mm
NAS or NRC-BEIR - CORRECT ANSWER >>National Academy of
Sciences/National Research Counsel on the Biological Effects of Ionizing
Radiation
studies biologic effects of ionizing radiation and publishes the data
NCRP - CORRECT ANSWER >>National Counsel on Radiation Protection
publishes radiation protection guidelines for the US
NRC - CORRECT ANSWER >>Nuclear Regulatory Commission
enforces radiation protection standards at the federal level
, NCRP Report number 102 - CORRECT ANSWER >>makes recommendations on
equipment design and protection regarding lead shielding and fluoro and mobile
exposure rates
NCRP Report number 116 - CORRECT ANSWER >>makes recommendations
pertaining to risk-benefit analysis of radiation exposure; states genetic and
somatic effects need to be kept to a minimum; makes annual dose limits
NCRP number 160 - CORRECT ANSWER >>addresses radiation exposure from
all sources to people in the US
effective dose limit - CORRECT ANSWER >>upper boundary dose that can be
absorbed (either in a single exposure or annually) with negligible risk of genetic
or somatic effects to the individual
cumulative effective dose - CORRECT ANSWER >>lifetime occupational
exposure must not exceed radiographer's age x 10 mSv
equivalent dose - CORRECT ANSWER >>equal to the absorbed dose multiplied
by the radiation weighting factor
equivalent dose limit - CORRECT ANSWER >>upper boundary dose that can be
absorbed (either in a single exposure or annually) with negligible risk of
deterministic effect
Dose Area Product (DAP) - CORRECT ANSWER >>total air kerma striking the
patient
probabilistic effects (stochastic) - CORRECT ANSWER >>randomly occurring
effects of radiation; probability is proportional to the dose (increased dose =
increased probability)
Deterministic Effects - CORRECT ANSWER >>radiation effects that become
more severe at higher levels of radiation exposure; do not occur below a certain
threshold
GSD (Genetically Significant Dose) - CORRECT ANSWER >>average annual
gonadal dose of radiation to individuals of childbearing age; addresses the
relationship of gonadal doses to individuals versus an entire population and the
