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44 Cards in this Set
- Front
- Back
- 3rd side (hint)
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X-rays differ due to |
Shorter wavelengths |
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X-rays packet |
Of energy |
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Electrons are |
Negatively charged |
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How much energy produced is heat |
99% |
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How much energy produced is x-ray |
1% |
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Medically correct term for x-ray |
Radiograph |
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Table mount used for |
Small animal |
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Ceiling mount used for |
Large animal |
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Stationary table top |
Most common |
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What are the 2 x-ray machine tables |
Stationary and floating |
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kVp dial major range |
10-12 |
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kVp dial minor |
1-2 |
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Cathode |
- electrode |
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Anode |
+ electrode |
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Glads envelope prevents |
Oxidation of elements |
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Tungsten filament similar to |
Filiment in light bulb |
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When the Tungsten filament is heated |
It emits electrons |
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Focusing cup contains |
Filament |
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Focusing cup controls |
Size of electron beam |
D |
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Primary x-ray beam created |
After electrons cross over |
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Tungsten target contained |
In anode |
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Beryllium window is |
An exit portal for x-ray beams |
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Aluminum filter absorbs |
Soft (lazy) x-rays |
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Excessive anodes |
Cause heat damage |
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2 types of anode machines |
Stationary and rotating |
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Stationary anode utilized |
In low output |
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Rotating anode |
Dissipates heat preventing damage |
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mA x sec = |
mAs |
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mAs controls |
Quantity of x-rays |
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Larger body areas |
Require higher mAs |
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Head of patients should face |
Anode side of machine |
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kVp penetrates |
Through more |
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kVp controls |
Quality of x-ray beams |
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Grids are between |
The patient and film |
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Grids are used when radiographs |
> 10 cm |
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< 10 cm is called |
Table top grid |
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Focal spots major function is to |
Distribute electron stream over larger area |
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As focal spot gets bigger |
Clarity decreases |
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Smaller focal spot is |
Less heat dissipation |
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Heel effect is caused by |
Uneven absorption of x-rays in tungsten target |
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Repeated tube overload |
Will crack anode (mAs) |
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Tube saturation aka |
Arching |
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Tub saturation occurs when |
kVp not high enough to pull electrons |
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Cathode failure (Filiment evaporation ) |
Most common cause of tube failure |
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