Computed Radiography Test
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| voxel | show 🗑
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| show | image reader device-reads latent image on CR cassette
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| show | *indirect capture
*cassette-based
*film-less
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| show | *x radiation ionizes europium sites causing them to release free eletrons
*free electrons are moved to a higher energy band called F center
*F center holds electrons in bound state
*# of trapped electrons is equal to absorbed radiation
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| show | *determines the maximum spatial resolution for a given sampling frequency by IRD
*states that if the desired spatial resolution is (x) the sampling frequency must be 2(x)
-increasing the sampling frequency increases the time it takes to display an image
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| needle/columnar phosphor | show 🗑
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| show | phosphor crystals distributed throughout a phosphor layer
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| europium | show 🗑
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| when should you use a grid | show 🗑
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| radiopaque | show 🗑
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| radioluscent | show 🗑
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| show | *header with pt name and medical record number, and other pt info, that cannot be edited by RT
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| show | any unwanted density
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| what are the different types of ADC in the IRD | show 🗑
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| what is the relationship between scanning freq. and contrast and resolution | show 🗑
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| show | *use window and level/width
*ROI box
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| ROI | show 🗑
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| show | modulation transfer function- measure of the quality of a detector system, determined by the systems contrast and spatial resolution quality
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| banding | show 🗑
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| flat panel artifacts | show 🗑
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| software artifacts | show 🗑
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| subject artifacts | show 🗑
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| show | *CR image acquisition operation that affects certain factors
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| show | *unsure of what is on them
*hasnt been used in 48 hrs
*erase twice if double exposed or used on large pt
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| how long after exposure should you process an imaging plate | show 🗑
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| what will happen if you turn tube with grid | show 🗑
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| show | *blue line down if lengthwise
*blue line to your right if crosswise
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| show | *backside *antistatic/backing layer *base *reflective/anti-halo layer *phosphor layer *protective coat/layer
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| what is the backside of the cassete made of | show 🗑
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| show | *mounted to the back of cassette *prevents handling artifacts *contains barcode *prevents static energy
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| reflective/anti-halo layer | show 🗑
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| phosphor/active layer | show 🗑
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| show | *toward tube *prevents handling artifacts *allows cleaning
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| show | carbon or bakelite
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| show | *needle/columnar *turbid
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| what does speed class affect | show 🗑
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| show | to tell the range of exposures that are acceptable
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| what is the first step in the conversion of a latent image to manifest image in the IRD | show 🗑
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| show | *high level lase scan to release trapped electrons from f center and back into their regular state, causing emision of light
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| show | *light is captured by CCD, which converts it to an electronic signal
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| what controls contrast resolution | show 🗑
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
bigad1982
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