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RADT465 Direct Study
Unit 5-Radiation Protection
| Question | Answer |
|---|---|
| What is the unit of radiation absorbed dose? | Gray (Bushong,10th ed., p. 22) |
| What is the unit of radiation exposure or intensity? | Air kerma (Bushong,10th ed., p. 22) |
| What is the unit of occupational radiation exposure and effective dose? | Sievert (Bushong,10th ed., p. 23) |
| Uncharged molecule that contains a single unpaired electron in outer shell | free radical (Bushong,10th ed., p. 491) |
| The immediate response of radiation sickness | prodromal period (Bushong,10th ed., p. 505) |
| The time after exposure during which there is no sign of radiation sickness | latent period (Bushong,10th ed., p. 505) |
| Characterized by reduction in white blood cells, red blood cells, and platelets | hematologic syndrome (Bushong,10th ed., p. 505) |
| _____ is the shrinkage of an organ or tissue caused by cell death. | Atrophy (Bushong,10th ed., p. 505) |
| What is the first observed biologic response? | Erythema (Bushong,10th ed., p. 508) |
| These are the most radiosensitive cells in the body? | lymphocytes and spermatogonia (Bushong,10th ed., p. 512) |
| List the three parts hemopoietic system | bone marrow, circulating blood, and lymphoid tissue (Bushong,10th ed., p. 516) |
| The theory of radiation hormesis suggests that very low radiation does are _________. | beneficial (Bushong,10th ed., p. 523) |
| What is the most radiosensitive period of pregnancy? | first trimester (Bushong,10th ed., p. 531) |
| What are the three cardinal principles of radiation protection? | time, distance, and shielding (Bushong,10th ed., p. 539) |
| Leakage radiation must be less than ________ at a distance of _____ from the protective housing. | 1mGy/hour ; 1m (Bushong,10th ed., p. 549) |
| The SID indicator must be accurate to within ____%. | 2 (Bushong,10th ed., p. 549) |
| ________ radiation is the useful beam. | primary (Bushong,10th ed., p. 553) |
| The two types of secondary radiation. | scatter radiation and leakage radiation (Bushong,10th ed., p. 553) |
| When does a technologist receive most of their occupational radiation exposure? | fluoroscopy (Bushong,10th ed., p. 554) |
| What is the annual recommended occupational dose limit per year? | 50 mSv (Bushong,10th ed., p. 555) |
| Three expressions of patient radiation dose | entrance skin dose, gonadal dose, and bone marrow dose (Bushong,10th ed., p. 566) |
| The exposure cord on a portable x-ray unit must be at least _____m long. | 2 (Bushong,10th ed., p. 588) |
| Recommended thickness of lead protection | .25mmPb (Bushong,10th ed., p. 592) |
| Normal thickness of lead protection | .5mmPb (Bushong,10th ed., p. 592) |
| This type of radiation monitor is very sensitive, accurate, and can be worn for up to a year | OSL dosimeter (Bushong,10th ed., p. 596) |
| Radiographer should never_____ patients. | hold (Bushong,10th ed., p. 596) |
| What is the device used to reduce the intensity of scatter radiation in the x-ray beam? | Grid (Bushong,10th ed., p. 606) |
| What is the measure of the rate at which energy is transferred from ionizing radiation to soft tissue? | Linear energy transfer (LET) (Bushong,10th ed., p. 608) |
| What is the dose of standard radiation necessary to produce a given effect to the dose of the test radiation needed for the same effect? | Relative biologic effectiveness (RBE) |
| The device detects and measures exposure to ionizing radiation? | dosimeter (Bushong,10th ed., p. 603) |
Created by:
lawebster
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