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RADT 456 Rad Pro

ARRT registry review covering radiation protection

QuestionAnswer
T/F All of the following devices are used to help reduce patient dose: collimator, grid, and gonadal shield. False, only the collimator and gonadal shield reduce patient dose; pg. 136 Q&A
Which term describes the irradiation of water molecules within the body that results in breakdown? Radiolysis; pg. 136 Q&A
A dose must be received before a response can occur, this is known as what? Threshold; pg. 231 Rad Prep
T/F Nonstochastic risks are characterized by nonlinear dose responses and are associated with a threshold dose below which no effect is observed. True; pg. 232 Rad Prep
What term is used to describe the rate at which radiation deposits energy as it passes through tissue? LET, Linear Energy Transfer; pg. 234 Rad Prep
What is the most radiosensitive cell? Lymphocyte; pg. 237 Rad Prep
What is the effect on relative biologic effectiveness (RBE) as linear energy transfer (LET) decreases? As LET decreases, RBE decreases; pg. 245 Rad Prep
If a quantity of radiation is delivered to a body over a long period of time the effect will be more or less than if it were delivered all at once? Less; pg. 138 Q&A
What is the source-to-skin distance(SID)for stationary (fixed) fluoroscopic equipment? At least 15 inches; pg. 263 Rad Prep
What is the established annual occupational dose-equivalent limit for the lens of the eye? 1.5 rem/ 150 mSv; pg. 136 Q&A
What type of x-ray interaction contributes to patient dose? Photoelectric effect; pg. 229 Rad Prep
What are some examples of stochastic effects/ late effects? Carcinogenesis, cataractogenesis, embryologic effect, and lifespan shortening; pg 231 Rad Prep
Which dose-response relationship illustrates stochastic responses and is the curve of choice for occupational exposure? Linear nonthreshold; pg. 232 Rad Prep
The interaction between ionizing radiation and the target molecule that is most likely to occur is the? Indirect effect; pg. 136 Q&A
List the three types of acute radiation syndrome. Hematopoietic, gastrointestinal, central nervous system; pg. 241 Rad Prep
What type of crystals do the thermoluminescent dosimeters use? Lithium fluoride; pg. 137 Q&A
Primary radiation barriers must be at least how tall? 7ft.; pg. 139 Q&A
What is the source-to-skin distance (SID) for mobile fluoroscopic equipment? At least 12 inches; pg. 263 Rad Prep
What is the annual occupational whole-body dose -equivalent limit? 50 mSv; pg. 137 Q&A
T/F All of the following are considered sources of secondary radiation: leakage radiation, background radiation, and scattered radiations. False, just leakage and scattered radiation are sources of secondary radiation; pg. 137 Q&A
An optically stimulated luminescence dosimeter contains what kind of detector? Aluminum oxide; pg. 139 Q&A
Primary radiation barriers are required to be how thick? 1/16 in. of lead; pg. 142 Q&A
What term can be used to describe x-ray beam quality? Half-value layer (HVL); pg. 144 Q&A
The photoelectric effect is an interaction between an x-ray photon and what? An inner-shell electron; pg. 146 Q&A
A student radiographer who is under the age of 18, must not receive an occupational dose greater than what? 0.1 rem (1 mSv); pg. 151 Q&A
Created by: Almehringer
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