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Mobile radiographic units must be arranged so that the operator can stand at least how far from the unit? (160)
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The annual occupational whole-body dose-equivalent limit is how much? (161)
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RADT 456:Rad Protect
ARRT registry review
| Question | Answer |
|---|---|
| Mobile radiographic units must be arranged so that the operator can stand at least how far from the unit? (160) | 6 feet |
| The annual occupational whole-body dose-equivalent limit is how much? (161) | 50 mSv |
| Classic scatter is also referred to as? (162) | Thompson scatter |
| What time of radiation consists of leakage and scattered radiation? (163) | Secondary radiation |
| TLDs are personnel radiation monitors that use what kind of crystals? (163) | Lithium fluoride crystals |
| What kind of radiation is naturally occurring that is emitted from the earth and that also exists within our bodies? (163) | Background radiation |
| For radiation safety, the fluoroscopy exposure switch must be what kind of switch? (166) | Dead man switch |
| How high must primary radiation barriers be? (166) | 7 feet |
| What is the unit called that measures the quantity of ionizations in the air? (167) | Roentgen |
| The first noticeable skin response to excessive irradiation would be? (170) | Erythema |
| Fluoroscopic equipment must provide at least how many inches between the x-ray source and the x-ray tabletop? (173) | 12-15 inches |
| OSL dosimeters are radiation monitors that use what type of crystals? (178) | aluminum oxide crystals |
| Chromosome aberration, cell death, and malignant disease are major effects of what? (179) | DNA irradiation |
| True or False. Biologic tissue is more sensitive to radiation when it is in an oxygenated state. (180) | True |
| Who is responsible for being certain that established guidelines are enforced and that personnel understand and employ radiation safety measures to themselves and their patients? (184) | Radiation safety officer |
| What determines the degree of penetration and the amount of energy transferred to the irradiated tissue? (185) | Radiation quality |
| What type of radiation emerges from the patient to form the radiographic image? (187) | Remnant radiation |
| Pair production occurs only at very high levels of at least? (188) | 1.02 MeV |
| Which type of interaction involves only the partial transfer of energy? (190) | Compton interactions |
| What is the occupational dose limit for students under the age of 18 years of age in any given year? (181) | 0.1 rem |
| What are the two most important ways to protect from radiation exposure? (173) | Distance and lead |
| Radiation effects that appear days or weeks following exposure in response to high radiation doses is called? (171) | Acute radiation syndrome |
| What is an example of a somatic effect of radiation? (163) | Cataract |
| What is the name of the type of white blood cell concerned with the immune system that has the greatest radiosensitivity of all body cells? (160) | Lymphocytes |
| What refers to a directional characteristic of the x-ray beam as it is emitted from the focal spot? (165) | Divergence |
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