Grids Review
Help!
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| show | .1% or 1/1000 of primary beam
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| what are the patient factors that affect scatter radiation | show 🗑
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| what percentage of scatter makes up the useful density on a chest xray | show 🗑
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| show | 90%
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| what happens if you have too much scatter | show 🗑
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| what is the purpose of an xray grid | show 🗑
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| where is the grid located | show 🗑
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| when should we use a grid | show 🗑
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| show | alternating radio-opaque lead and radiolucent interspace(aluminum,carbon fiber,or plastic fiber)
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| what causes grid cutoff | show 🗑
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| _________ grids cause grid cutoff on the periphery, but you can use any SID | show 🗑
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| show | focussed grids
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| cross type grid | show 🗑
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| grid ratio | show 🗑
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| show | -number of grid lines per unit of measurement
-60-196 per inch or 152-498 per cm
-80-103 lines/in or 203-261 lines/cm is common
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| show | -stationary
-clip on
-grid cassettes
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| potter bucky diaphragm | show 🗑
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| bucky factor | show 🗑
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| when using a grid what must we do | show 🗑
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| show | shortens it
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| contrast improvement ability | show 🗑
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| what are the types of grid positioning errors | show 🗑
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| causes severe peripheral cut-off and is the least common of grid errors | show 🗑
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| show | off level grid
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| show | off center(lateral decentering)grid
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| causes cut-off on periphery of image | show 🗑
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| stroboscopic effect | show 🗑
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| what are some alternate methods of reducing scatter | show 🗑
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| show | for every inch of OID you must increase SID by a foot
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| show | specific range of SID's that can be used for focused grids
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