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VET 246 Week 1
Radiation safety
Question | Answer |
---|---|
X-rays ____ the water in our bodies which produces free ____ | ionize; radicals |
____ is highly susceptible to radiation | DNA |
Stochastic effect | No immediate effects but internal damage may show up later Ex. Cancer, Sterility, Hyperthyroidism, Hypothyroidism, Cataracts |
Deterministic effect | Portions of DNA may be compromised enough to show obvious damage Eg. Sunburn |
The main concern with radiation is _____ effects | latent |
The primary culprit that affects healthcare workers is ____ radiation | Scatter |
X-rays travel in a ____ line | straight |
_ to __ weeks of pregnancy are the most vulnerable. | 2 to 10 |
Biologic amplification | Once a cell develops a mutation, every cell that divides from it also has the mutation. |
Higher energy levels penetrate _____ and lower energy levels penetrate only _____ (kVp) | deeper; superficially |
Linear Energy Transfer | The ability to transfer energy |
The greater the LET, the more ___ is being transferred to the surrounding soft tissue (more radiation) | energy |
___ have low LETs with higher penetrability | x-rays |
______ has high LETs with lower penetrability | scatter radiation |
More density = | More x-ray absorption |
When the x-rays hit the film it turns ____ after processing | black |
When x-raying bone, the rays are ___ | absorbed |
ALRA | As low as reasonably achievable |
Radiation doses should be as __ as possible. | low |
Protection | 3 cardinal rules: - Time - Distance - Shielding |
Inverse Square Law | The further from the source of radiation the safer you are (less radiation) , the closer you are to the source the more unsafe you are. (more radiation) |
Leaded aprons protect up to ___ kV | 125 |
Thermoluminescent dosimeters | Register a charger over time |
Dosimeter | measure exposure to radiation |