Computed Radiography Test
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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| show | 3D pixel
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| IRD | show 🗑
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| show | *indirect capture
*cassette-based
*film-less
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| what is the process of latent image acquisition | show 🗑
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| nyquist frequency | show 🗑
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| needle/columnar phosphor | show 🗑
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| show | phosphor crystals distributed throughout a phosphor layer
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| show | *impurity that allows luminescence *has ecxess electrons at ground level *activator *storage property
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| when should you use a grid | show 🗑
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| show | cannot be penetrated by xrays
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| show | easily penetrated by xrays
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| dicocm header | show 🗑
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| show | any unwanted density
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| show | *photomultiplier tube
*photodiode
*CCD
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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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| show | range/region of interest-box shaped area of an anatomic structure on a reconstructed digital image defined by the operator by moving the cursor
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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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| show | *inorrect histogram
*auto-rescaling not working
*image too compressed
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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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| show | *within 1hr to avoid degeneration
-latent image loses 25% of its energy within 8hrs
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| what will happen if you turn tube with grid | show 🗑
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| which way is the correct way to place your cassette | show 🗑
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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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| antistatic/backing layer | show 🗑
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| show | *prevents laser light from bouncing back and causing fog or noise *anti-halo is blue *reflective is white
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| show | *acquires latent image
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| protective layer/overcoat | show 🗑
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| what is the material that is on the outer covering(tube side) made of | show 🗑
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| what are the two ways that phosphor crystals are aranged in a psp plate | show 🗑
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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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| show | *there is an initial low level laser scan that sets boundries for collimation of the image and test to make sure latent image matches histogram selected before setting aut-rescaling
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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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| show | *dynamic range *quantization
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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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