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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| show | phosphor crystals arranged as needles or columns
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| turbid phosphor | show 🗑
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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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| show | the higher the scanning frequency, the higer the contrast and resolution
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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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| MTF | show 🗑
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| banding | show 🗑
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| show | *dust/dirt
*scratches
*pixel malfunction
*gost images
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| software artifacts | show 🗑
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| show | *piercings on pt
*any metal or artifacts on pt
*collimation off
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| speed class | show 🗑
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| when should you erase xray plates | show 🗑
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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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| which way is the correct way to place your cassette | show 🗑
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| what are the layers of a CR cassette | show 🗑
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| show | lead, also contains lead foil on the inside
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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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| phosphor/active layer | show 🗑
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| show | *toward tube *prevents handling artifacts *allows cleaning
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| what is the material that is on the outer covering(tube side) made of | show 🗑
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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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| what is the third step in the conversion of a latent image to manifest image in the IRD | show 🗑
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| show | *dynamic range *quantization
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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.
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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