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15 Cards in this Set
- Front
- Back
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natural sources of radiation per year |
3.1 mSv (internal is 73%) |
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artificial radiation sources per year |
3.0 mSv |
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dental radiation per year |
2.5% medical dose, 0.3% total dose |
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principle to follow in exposure and dose for radiography |
ALARA |
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effects compared to when discussing dose safety |
stochastic |
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occupational dose limits |
50 mSv per year |
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non-occupational dose limits |
10% of occupational, 5 mSv for infrequent, 1 for frequent |
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barrier material |
lead 2-3 inches of air, 3/4 inch glass |
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where to stand |
6 feet away at 90*-135* from beam |
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film to use |
F speed, 40% exposure of D-speed |
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receptors to use |
digital/phosphor, 40-50% of F/E speed exposure |
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extraoral |
use intensifying screens, rare earth 55% less exposure than calcium tungsten |
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receptors for extraoral |
no benefit for digital |
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collimation |
for exposure areas <7 cm, 2.75 inches in diamter, square is 50% better than round |
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focal film distance and filtration |
x ray source--> skin>7 inches, 2.5 mm aluminum needed |
