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RADT 465 Rad Protect
ARRT review of Radiation Protection
| Question | Answer |
|---|---|
| True or False: Early effects of radiation can be seen in diagnostic radiology. (pg.231) | False |
| Late effects of radiation exposure include: (pg.231) | Carcinogenesis, Cataractogenesis, Embryologic effect, Lifespan shortening |
| Used to illustrate responses such as radiation-induced leukemia, cancer, and genetic effects (pg. 231) | Linear non threshold curve |
| Occur randomly and are "all or nothing" type of effects; they do not occur with degrees of severity (pg. 231) | Stochastic |
| The effects of radiation are not proportional to the dose received, can be threshold or nonthreshold, usually an S shape (pg.231) | Nonlinear curve |
| The Law of Bergonie and Tribondeau addresses relative tissue sensitivity and states that the following are particularly radiosensitive: (pg. 233) | Stem (undifferentiated, or precursor) cells, young, immature tissues, highly mitotic cells |
| Causes the removal of electrons from some atoms and the addition of electrons to other atoms (pg. 233) | Ionization |
| The fetus is the most radiosensitive during the: (pg. 237) | First trimester |
| True or False: Occupationally exposed personnel are concerned with the late effects of radiation exposure. (pg.242) | True |
| The genetic dose of radiation borne by each member of the reproductive population is called the: (pg. 242) | genetically significant dose |
| The type of dose-response curve used to predict stochastic effects is the: (pg. 245) | Linear nonthreshold |
| The most efficient beam-restricting device (pg. 250) | collimator |
| True or False: Beam restriction is the most important way to reduce patient dose. (pg. 252) | True |
| True or False: Beam restrictors increase the production of scattered radiation. (pg. 252) | False |
| Removes low energy x-rays from the primary beam(pg. 254) | Filtration |
| The benefits of filtration include: (pg.254) | Reduced patient skin dose, increasing the average energy of the beam |
| Inherent filtration includes: (pg.254) | Glass envelope, oil coolant/insulation |
| Added filtration includes:(pg.254) | Collimator and mirror |
| Equipment operated above 70 kV must have at least ________ mm Al equivalent. (pg. 253) | 2.5 |
| Gonadal shielding should be used if the gonads lie in, or within __ cm of the collimated field. (pg.255) | 5 |
| Emitted from the x-ray tube housing in directions other than that of the primary beam (pg.270) | Leakage radiation |
| Protect from scattered and leakage radiation. Lead aprons, gloves, and glasses are considered these. (pg. 273) | Secondary barriers |
| Establishes limits for exposure to ionizing radiation with which radiographers should be familiar. (pg. 289) | NCRP Report No. 116 |
| The NCRP recommends an annual effective occupational dose-equivalent limit of: (pg.291) | 50mSv |
| The pregnant radiographer's gestational exposure to the fetus must not exceed: (page. 289) | .5 rem or 5mSv |
Created by:
jkcottongim
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