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26 Cards in this Set
- Front
- Back
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Intensifying screens
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layer of luminescent crystals placed inside a cassette to expose x ray film efficiently reduce patient dose(luminescent phosphor crystals)
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Latent image
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image before processing
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radiopaque
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not easily penetrable by x rays or other forms of radiant energy
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window level
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brightness
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15% rule
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kvp and density go up(directly proportional)
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direct exposure
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photons are absorbed by the coating material and immediately converted into an electrical signal.
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indirect capture
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x rays photons trike a scintillator that produces light and the light strikes the amorphus siicon, allowing the conduction of electrons into the detector. tft will send the electronic to the image processor
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Recorded detail
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the distinct representation of an objects true boarders or edges
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distortion
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misrepresentation of the true size of shape of an object
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Indirect
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1. incident x ray photons
2. cesium iodide scintilator 3. light 4. tft photodiode 5. electrons 6. readout electrons |
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scinitllator(direct)
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made of amorphus selenium
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indirect
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uses amorphous silicon
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Ma and mAs are directly related
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mas increases exposure and density
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penetrating ability
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low energy photons have difficulty passing through dense body tissures
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as kvp increases image receptor exposure increases
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not directly proportional
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Decrease in scatter
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causes decrease in density
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No Grid, 5, 6, 8, 12, 16
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1, 2, 3 , 4, 5, 6
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If the temperature of the solution is too hot
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the density is increased(chemical fog)
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exposure latitude for digital vs film screen
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latitude is greater for digital
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Contrast media
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increase in kVp
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x ray tabletops
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radiolucent
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x ray generator
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power of an x ray system is rated in kilowatts and is expressed numerically
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overhead tubecrane systems
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sophisticated designs and the standard of care in hospitals and large clinicals
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Within 8 hours of exposure, the plate may lose up to 25% of its original signal
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bb
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plate is not considered suitable for clinical use
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within 24 hrs
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Radiographs
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two dementional
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