ARRT Test Prep 220 Questions and Answers 100% Verified Main property of x-radiation that makes it potentially hazardous is its ability to? - Correct Answer Ionize Describe the damage potential of ionization? - Correct Answer 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? - Correct Answer Carcinogenesis - Stochastic/Non-Threshold Effect .1 Rem = ? Seivert - Correct Answer 1 Sievert 0.1 Gray = ? Rad - Correct Answer 10 Rad
- Gray = ? Rad - Correct Answer 100 Rad
What is Aplastic Anemia? When dose it occur? - Correct Answer 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? - Correct Answer 25 Rads or .25 Gray What is Cataractogenesis? - Correct Answer Process of Cataract Formation Cataractogenesis occurs after acute or chronic exposures of how many Rads? - Correct Answer 200 Rads, 2 Gray Skin Eyrythemia (Skin Redning) occurs above? - Correct Answer Above 200 Rad, 2 Gray Temporary Sterility occurs in the adult male at acute doses of how many Rads? - Correct Answer 250 Rads, 2.5 Gray Pregnant radiographer should? (3) - Correct Answer 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? - Correct Answer OCCUPATIONAL exposures only. 1 / 3
Monthly Dosimeter reports does NOT include? - Correct Answer Natural or Background Radiation What is the recommended monthly dose-equivalent limit for the fetus in the third trimester? - Correct Answer 0.5 mSv .05 Rem
NRCP 116
Radiation workers cumulative dose-equivalent limit is determined by? - Correct Answer 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? - Correct Answer 50 mSv (5 Rem) When using a C-Arm mobile unit, the intensification tower should be? - Correct Answer As close as possible to the patient to reduce patient dose and unnecessary magnification.Radiation exposure in air = ? - Correct Answer 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? - Correct Answer Ion Chamber The quantity of radiation exposure measured by an ionization chamber would be? - Correct Answer Coulomb/Kilogram The C/Kg or R is usually the unit measured in? - Correct Answer Air dose List the 3 measurements that are more appropriate for measuring absorbed doses for radiation or occupational dose? - Correct Answer Gray (1) - Rad (100) Seivert (1) - Rem (100) Curie - Bacquerel What type of changes are used to measure occupational dose? (3) - Correct Answer Scintillation Biological Chemical Example of personnel monitor that measures radiation thru chemical change reaction? - Correct Answer Film Badge - Operate off Gurney-Mott theory.Explain the Gurney-Mott Theory...? - Correct Answer Describes how an x-ray photon changes silver halide into atomic silver in the film emulsion--a definite chemical change. 2 / 3
How long can a film badge be worn? - Correct Answer No more than a month Why shouldn't film badges be worn greater than a month? - Correct Answer Extreme sensitivity to environmental conditions.TLD's operate thru? - Correct Answer Luminescence (NO chemical rx's occur) Pocket dosimeters can only work for? - Correct Answer 1 day and must be reset everyday.Upper reading limit of 200-300 rads Pocket dosimeter uses? - Correct Answer Electrical current as a measurement of charge.The type of personnel monitor that could be worn the longest is the? - Correct Answer OSD Optical stimulated detector can be worn up to? - Correct Answer 3 months and be sensitive to 2 mR Leakage radiation should NOT exceed how much mR at 1 meter from the scource? - Correct Answer 100 mR per hr 0.1 Rad per hr
NCRP 102
According to Bushong, tabletop intensity should NOT exceed what? - Correct Answer 2.1 mR per min for each mA operating at 80 kVp.Under normal modes of operation, fluoroscopic procedures should NOT exceed? - Correct Answer 10 Renkens per min.What does GSD stand for? - Correct Answer Genetic Significant Dose What is GSD? - Correct Answer Average gonadal dose received by an exposed population. It is used to estimate the genetic impact of medical radiation dose on the entire population.Beam limiting devices will? (3) - Correct Answer Improve image quality Reduce patient dose Reduce scatter radiation The purpose of reducing added filtration is to reduce radiation dose to? - Correct Answer Patients skin Recommended amount of filtration in Fluoro? - Correct Answer 3 mm Al Equivalent
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