click below
click below
Normal Size Small Size show me how
RADT 456 Rad Pro
ARRT registry review covering radiation protection
Question | Answer |
---|---|
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 |