Grid Study sheet
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Define grid. | show 🗑
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| show | Body thickness exceeds 10 cm or kVp is above 60
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| show | 1913
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| When did Hollis Potter invent the moving grid? | show 🗑
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| Radiolucent interspace materials are usually made out of what 2 materials? | show 🗑
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| What is the formula for grid ratio? | show 🗑
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| show | Number of grid lines per inch or centimeter.
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| As the lead content of a grid increases, the ability of the grid to remove scatter and improve ____ ______. | show 🗑
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| Name the 3 grid patterns. | show 🗑
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| show | Parallel (Lead and interspace materials running parallel), and focused (central grid strips parallel and other strips are inclined.)
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| What is the formula for grid selectivity? | show 🗑
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| What symbol identifies selectivity? | show 🗑
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| show | K = Radiographic contrast with the grid DIVIDED by
Radiographic contrast without the grid
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| show | The tube is angled across the long axis of the strips.
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| Define off-center. | show 🗑
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| Define off-focus. | show 🗑
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| show | Occurs if proper distance is not used with the specified distance.
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| show | Reciprocating (back & forth); Oscillating (circular movement)
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| show | An alternative to the use of a grid.
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| When is the air-gap technique used? | show 🗑
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| What is the disadvantage to using the air-gap technique? | show 🗑
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| What is the Moire effect? | show 🗑
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| An __________ relationship exists between the distance between lead strips and grid ratio when the height of the grid strips remains the same. | show 🗑
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| show | Increases
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| show | Linear
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| show | Grid radius
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| For the grid to be properly focus, the x-ray tube must be located along the _________ __________. | show 🗑
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| show | Short focal range
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| show | Long focal range
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| Focused grids with ________ _____ ____ allow for greater latitude in alignment of the tube with the grid. | show 🗑
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| show | Increase
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| The grid with the higher lead content would have a ___________ selectivity. | show 🗑
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Created by:
rad1958tech
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