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35 Cards in this Set
- Front
- Back
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Scatter radiation |
Back (Definition) |
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Where does a grid go |
Between the patient and IR |
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Scatter radiation review |
Back (Definition |
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What does scatter radiation do to a radiation |
Back (Definition) |
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What is a grid |
Back (Definition) |
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What does a grid do |
Back (Definition) |
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When do we use a grid? |
When the body part is 10cm or larger Body parts from the shoulder to the knee. The neck the skull |
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Portable grid |
Used when the patient can’t come to us. Those in ICU in the ER |
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Technical factors while using grids |
The patient exposure is increased due to higher technical factors is minimal. Insignificant |
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Grid construction and history |
Back (Definition) |
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Good and bads about grids |
Back (Definition) |
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Grid efficiency |
Back (Definition) |
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Grid ratio |
Back (Definition) |
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Grid ratio example |
Back (Definition) |
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Grid ratio cont. |
Back (Definition) |
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Grid frequency |
Back (Definition) |
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Grid lines |
The advantage with thicker grid lines is that scatter radiation doesn’t pass through the thick grid lines. But they are sometimes visible in the radiograph. While the thinner grid lines don’t absorb as much scatter radiation but they are not visible in the radiograph |
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Grid efficiency |
Back (Definition) |
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Selectivity |
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Contrast improvement factor |
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Bucky factor |
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Bucky factor in comparison with grid ratio |
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crosshatch grid |
Back (Definition) |
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Grid cutoff |
Back (Definition) |
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SID (off-focus error) |
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Angulation |
Back (Definition) |
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Centering |
Back (Definition) |
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Pros and cons of higher grid ratios |
Lower margin of error for higher grid ratios |
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Parallel grid |
Back (Definition) |
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Upside down grid |
Back (Definition) |
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Air gap effect |
Scatter radiation will be absorbed by the air before it reaches IR |
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Moving grid |
Back (Definition) |
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Types of moving grids |
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Focused grid |
Matches the divergence of the X-ray beam |
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Grid specifications |
Back (Definition) |
