ARRT Test Prep | 222 Questions with 100% Correct Answers | Verified | 2023
Main property of x-radiation that makes it potentially hazardous is its ability to? ✔✔ Ionize
Describe the damage potential of ionization?
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ARRT Test Prep | 222 Questions with 100% Correct Answers | Verified | 2023
Main property of x-radiation that makes it potentially hazardous is its ability to? ✔✔ Ionize
Describe the damage potential of ionization? ✔✔ Chain reaction in the human body that may eventually cause biologic damage. X-rays are from the Electric Magnetic Spectrum or radiation energy and is considered harmful in high energy ranges.
What is the most likely potential hazard working with diagnostic radiology? ✔✔ Carcinogenesis - Stochastic/Non-Threshold Effect
.1 Rem = ? Seivert ✔✔ 1 Sievert
0.1 Gray = ? Rad ✔✔ 10 Rad
1 Gray = ? Rad ✔✔ 100 Rad
What is Aplastic Anemia? When dose it occur? ✔✔ All types of blood cells: Red & White
25 Rads
A decrease in blood count is the earliest response seen to dose radiation. It can occur at dosease as low as? ✔✔ 25 Rads or .25 Gray
What is Cataractogenesis? ✔✔ Process of Cataract Formation
Cataractogenesis occurs after acute or chronic exposures of how many Rads? ✔✔ 200 Rads, 2 Gray
Skin Eyrythemia (Skin Redning) occurs above? ✔✔ Above 200 Rad, 2 Gray
Temporary Sterility occurs in the adult male at acute doses of how many Rads? ✔✔ 250 Rads, 2.5 Gray
Pregnant radiographer should? (3) ✔✔ Always practice TDS
Has legal right for re-assignment of duty
Never confuse collar badge with waist badge
Monthly dosimetry reports is based on what? ✔✔ OCCUPATIONAL exposures only.
Monthly Dosimeter reports does NOT include? ✔✔ Natural or Background Radiation
What is the recommended monthly dose-equivalent limit for the fetus in the third trimester? ✔✔ 0.5 mSv
.05 Rem
NRCP 116
Radiation workers cumulative dose-equivalent limit is determined by? ✔✔ Age x 10 mSv
Age x 1 Rem
NCRP 110
What is the Occupational radiation dose equivalent limit for stochastic effects to the whole body? ✔✔ 50 mSv (5 Rem)
When using a C-Arm mobile unit, the intensification tower should be? ✔✔ As close as possible to the patient to reduce patient dose and unnecessary magnification.
Radiation exposure in air = ? ✔✔ Roentgens - Ionization in air dose measurement.
Electrical current being generated by a charge created in air thru ionization by x/gamma radiation is called a? ✔✔ Ion Chamber
The quantity of radiation exposure measured by an ionization chamber would be? ✔✔ Coulomb/Kilogram
The C/Kg or R is usually the unit measured in? ✔✔ Air dose
List the 3 measurements that are more appropriate for measuring absorbed doses for radiation or occupational dose? ✔✔ Gray (1) - Rad (100)
Seivert (1) - Rem (100)
Curie - Bacquerel
What type of changes are used to measure occupational dose? (3) ✔✔ Scintillation
Biological
Chemical
Example of personnel monitor that measures radiation thru chemical change reaction? ✔✔ Film Badge - Operate off Gurney-Mott theory.
Explain the Gurney-Mott Theory...? ✔✔ Describes how an x-ray photon changes silver halide into atomic silver in the film emulsion--a definite chemical change.
How long can a film badge be worn? ✔✔ No more than a month
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