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RADT 456
Radiation Protection
| Question | Answer |
|---|---|
| What is Bremmsstrahlung Radiation pp. 227 | It occurs when a high-speed electron is attracted to the positive charge nucleus (tungsten atom). The attraction pulls the nucleus off course and redirects. This results in the loss of energy. |
| What is linear dose response pp.230 | the relationship in which the response is directly related to the does received. |
| What is a nonlinear dose relationship pp.230 | effects not proportional to dose |
| Threshold pp.230 | The dose below which no harmful effects are likely to occur or the dose at which response first begin. |
| What are some deterministic risks pp. 232 | Characterized by nonlinear dose response associated with a threshold dose below which no effect is observed |
| Examples of deterministic or nonstochastic effects pp.232 | skin injury, hypothyroidism, cataract formation, hair loss, temporary infertility and sterility. |
| Examples of probabilistic or stochastic effects pp. | heritable genetic effects, radiation induced cancer. |
| What are stochastic risks pp. 232 | no threshold or no safe dose |
| Rad stands for what pp. 282 | Radiation Absorbed Dose, The amount of radiation that is deposited in that matter |
| What is the SI unit for RAD? pp. 282 | Gray or Gy |
| REM stands for what? pp. 282 | Radiation Equivalent Man, information collected from the rad but also uses the quality factor to predict biological effects from different types of radiation. |
| What is the SI Unit for REM? pp. 282 | Sv or Sievert |
| What is a Optically Stimulated Luminescence (OSL) Badge pp. 283 | Dosimeter that contains aluminum oxide. The aluminum oxide absorbs and stores the energy associated with the radiation exposure. |
| What is Linear Energy Transfer (LET) pp. 234 | Expresses the ability of radiation to do damage. Diagnostic x-rays are considered low LET radiation. |
| What is Direct Effect pp.234 | Effect occurs when the ionizing particle interacts directly with the key molecule (DNA) or another critical enzyme or protein |
| What is Indirect Effect pp. 234 | Occurs when ionization takes place away from the DNA molecule,in cellular water. |
| What is the 10 day rule pp. 237 | A rule that identifies the first 10 days following the onset of the menses as the safesttime to schedule elective procedures of the abdomen/pelvis |
| Acute Radiation Syndrome is what? pp. 241 | Radiation sickness, an acute condition caused by a large external penetrating exposure of ionizing radiation |
| Hematopoetic Syndrome pp. 241 | Bone marrow syndrome that can cause nausea, vomitting, diarrhea, decreased blood count, infection, and hemorrhage |
| What is the effective dose limit for occupational exposure? pp. 269 | 5 rem or 50 mSv |
| What is the effective dose limit for embryo-fetus monthly exposure | .05 rem or .5 mSv |
| Protective lead aprons must have a minimum lead equivalent of what? pp. 271 | 0.25 mm Pb/eq |
| The NCRP guideline for an x-ray exposure switch is what type of switch? pp. 270 | Deadman Switch |
| What are the three cardinal rules in radiation protection? pp. 271 | time, distance, shielding |
| What is an example of a primary barrier pp. 272 | lead walls of the radiology room |
Created by:
esdelong
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