Rad Grids
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| what would be the only advantage of a linear parallel grid over a linear focus grid? | show 🗑
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| what is the advantage of a focus grid over a linear grid | show 🗑
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| show | parallel grid
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| show | grid cutoff
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| show | Crossed Grid. No
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| show | *
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| show | move out the grid line. oscillating and receptacle
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| does the grid start before or after exposure | show 🗑
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| show | the height of the grid divided by the interspace width. grid ratio= h/D h(height of grid) D(Interspace material) it can be aluminum(Best), plastic or carbon fiber
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| show | get smaller. More
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| what are the rules of thumb for using a grid | show 🗑
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| whats the formula for grid ratio | show 🗑
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| what are some common grid ratio's we might use? | show 🗑
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| show | grid frequency. *
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| if we were doing film screen technology what would be the most efficent grid you could buy | show 🗑
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| bucky factor | show 🗑
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| contrast improvement factor | show 🗑
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| what is the air-gap | show 🗑
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| whats an alternative when using film screen technology | show 🗑
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| show | thick lead lines
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| show | lead
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| show | carbon fiber, plastic, aluminum
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| what two factors determine grid efficency | show 🗑
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| show | increase patient dose
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| what is the main purpose of a grid | show 🗑
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| show | Increases
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| show | because everything is being absorbed
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| show | 50, 90
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| show | weaken photons from patient that change direction
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| what technical factor controls amount of scatter produce | show 🗑
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| show | pathology,type of tissue,thickness
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| show | more
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| show | high grid ratios(thiner interspace), low frequency (thicker lead lines)
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| so if you have less of an interspace and thick lead lines, very effiecent grid. do you have a lot of positioning latitude | show 🗑
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| show | better contrast, improved visibility detail
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| show | density difference, more black than white
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| if we increase the ratio of the grid to make it more efficent, what do we have to do to our techniques to compenstate for the loss of density | show 🗑
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| show | kvp
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| where is the highest % of scatter produced | show 🗑
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| show | 1/1000 or .1%
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| show | adipose, muscle(fluid filled)
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| show | No, But they will reduce after it is produced.
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| show | 117 high. thicker than 10 cm, so use grid. more, higher
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| show | low kvp 70-80, so use intermediate speed grid(10:1, 12:1)
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| what grid ratio do we use on portable xrays | show 🗑
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| why is it better to do kvp than mas | show 🗑
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| show | 5:1(2), 6:1(3), 8:1(4), 12:1(5), 15:1(6)
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| what is the definition of grid cutoff | show 🗑
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| show | severe peripheral, where both lung shadows should be
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| show | more to one side than another
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| what is the purpose of using a focus grid vs. a parallel grid | show 🗑
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| show | periphreal
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| show | image would be light*
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| show | go down, so increase kvp or mas to maintain it, and the contrast improves
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