Mosby's ARRT Exam and Study Guide Newest 2025
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Ionizing Radiation .....ANSWER..... radiation that is able to
remove electrons from an atom through ionization
Somatic effects .....ANSWER..... refers to the effects of radiation
to the body being irradiated
Genetic Effects .....ANSWER..... refers to effects of radiation to a
germ cell's genetic code; effects the next generation
Primary radiation .....ANSWER..... radiation exiting the x-ray
tube
Remnant radiation (or Exit Radiation) .....ANSWER..... x-rays the
leave the patient and strike the image receptor
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attenuation .....ANSWER..... absorption and scatter of the x-ray
beam as it passes through the patient
heterogenous beam .....ANSWER..... x-ray beam that has photons
of many different energies
photoelectric effect .....ANSWER..... absorption of x-ray photons
in the body
compton effect .....ANSWER..... scatter of x-ray photons in the
body
air kerma .....ANSWER..... unit of exposure
gray .....ANSWER..... unit of absorbed dose
gray(a) .....ANSWER..... unit of radiation absorbed in air
gray(t) .....ANSWER..... unit of radiation absorbed in tissue
sievert .....ANSWER..... unit of effective dose or unit of equivalent
dose
becquerel .....ANSWER..... unit of activity
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uncontrolled area .....ANSWER..... general public area, like
waiting room or stairways
controlled area .....ANSWER..... occupied by people trained in
radiation safety and wear radiation badges/monitors
x-ray tube leakage may not exceed what? .....ANSWER.....
1mGy(a) per hour at a distance of 1 meter from the housing
minimum lead equivalent for fluoro curtain .....ANSWER.....
0.25mm
minimum lead equivalent for bucky slot shield .....ANSWER.....
0.25mm
NAS or NRC-BEIR .....ANSWER..... National Academy of
Sciences/National Research Counsel on the Biological Effects of
Ionizing Radiation