click below
click below
Normal Size Small Size show me how
Radt 465
ARRT registry review covering radiation protection
Question | Answer |
---|---|
rad is an acronym for what? | radiation absorbed dose p.279 |
100 rad equals | 1 Gray p.279 |
100 rem equals | 1 Sivert p.279 |
What is the SI unit of Gray? | rad p/280 |
rem is an acronym for what? | radiation equivalent man p.280 |
radiation that has a higher linear energy transfer has a higher what? | greater potentail to produce biologic damage p.280 |
what is the SI unit of Sievert? | rem p.280 |
4 types of personal radiation monitors? | optically stimulated luminescence thermoluminsecent dosimeter film badge pocket dosimeter p281 |
OSL contains a thin layer of what? | aluminum oxide, it absorbs and stores energy associated with the exposure. allows for multiple read outs p281 |
film badges | convenient, low cost, processed monthly, uses film p.287 |
TLD's | use LiF crystals to store exposure information. they are more precise and more expensive than film badges and may be processed quarterly. p.287 |
what establishes limits for exposure to ionizing radiation? | NCRP p.287 |
What is the Law of Bergonie and Tribondeau for? | to determine the difference in radiosensitvity in tissues . work sheet in class |
what are the three laws? | if the maturity level of tissues are low than the radiosensitivity of that tissue is higher if the mitotic activity is high than the radiosensitivity is higher the more specialized the tissue the lower the radiosensitivity , work sheet in class |
what is more sensitive to radiation, breast or gonads? | gonads , worksheet |
What is the SI unit for Roentgen? | Gray,air |
What is the SI unit for Curie? | Beqquerel |
what is used to measure the quantity of radioactivity | Curie |
the most significant occupational radiation hazard is scatter radiation from what? | the patient p.268 |
leakage radiation is? | what is emitted from the x ray tube housing in directions other than that of the primary beam. |
the cord for the exposure switch on a portable x ray machine must be how long? | 6 feet p.273 |
All fluoroscopic equipment must provide how much distance? | at least 12 inches and preferably 15 inches between the x ray source and the x ray table top(patient) p.273 |
the cardinal principles of radiation protection? | time distance shielding p.273 |
most occupational radiation is received where? | fluoroscopy and mobile p.273 |
grids do what? | improve the radiographic image by reducing the amount of scattered radiation, but increases the exposure dose p.261 |