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17 Cards in this Set
- Front
- Back
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What is the mpd for radiation workers |
50 mSv |
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What is the mpd for general public |
5 mSv |
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What is the direct theory |
Xray photons collide with cell chemicals and break them apart by ionization |
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What is the indirect theory |
Cell damage occurs indiretly when xrays cause the formation of toxins in the cell ex: hydrogen perixide |
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What is acute radiation syndrome |
Symptoms of short term radiation effect after massive dose of radiation |
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What are the symtoms of ars |
Vomiting, rash, erythema, hair loss |
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What is the law of T and B |
Actively deviding cells are more sensitive than slowly deviding cells. The more specialized a cell, the more radio resistant. |
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What are some exceptions to the law of T and B |
White blood cells and reproductive cells |
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What are somatic cells |
All cells except reproductive cells |
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What is the somatic effect |
When radiation,effects all cells except reproductive cells. ( damage isn't passed along to offspring) |
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What is the genetic effect |
When radiation changes don't occur in irradiated individual but are passed on to offspring |
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What is the deterministic effect |
When the severity of change is dependent on the dose |
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What is the stochastic effect |
When the biological response is based on the probability of occurance rather than the severity of the change |
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A collimator should reduce the beam to what size? |
2.75 in |
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3 main protection methods for a radiographer |
Time, shielding, distance |
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How big does the aluminum filter have to be for machines operating in ranges below 70 kVp |
1.5mm |
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Size of aluminum filter in machines operating above 70 kVp |
2.5mm |
