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11 Cards in this Set
- Front
- Back
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The quality of an x-ray is dependent on what three factors? |
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How does מתח חילופין affect x-rays? |
When the current is smoother, the rays are less heterogenic (more homogenic)--this is good for penetration but bad for contrast. |
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How does קרינת בלימה affect the ray lengths? |
Causes random differences |
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What is the ration of קרינה קשה to קרינה רקה? |
20/80 |
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What is the purpose of filters? |
To reduce biological damage caused by absorbing x-rays that are weaker than 20 kv (under 40 can't penetrate) |
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What is tube filtration? |
Inherent עצמית filtration (fliter inside tube):
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What is added filtration? |
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What happens when we use more filter? |
Less radiation, but also less contrast |
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Inclusive filter= |
Inherent filter + additional filter |
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True or false. Thicker filters absorb more. |
True |
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True or false. Denser metal filters absorb less. |
False, they absorb more |
