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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voxel | show ๐
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IRD | show ๐
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what are some other terms for CR | show ๐
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what is the process of latent image acquisition | show ๐
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nyquist frequency | show ๐
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needle/columnar phosphor | show ๐
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turbid phosphor | show ๐
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europium | show ๐
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show | *kVp higher than 60
*whent the part being xrayed is at least 12cm thick
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radiopaque | show ๐
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show | easily penetrated by xrays
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dicocm header | show ๐
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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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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 ๐
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show | *dust/dirt
*scratches
*pixel malfunction
*gost images
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show | *inorrect histogram
*auto-rescaling not working
*image too compressed
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show | *piercings on pt
*any metal or artifacts on pt
*collimation off
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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 ๐
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what will happen if you turn tube with grid | show ๐
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which way is the correct way to place your cassette | show ๐
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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 ๐
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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 ๐
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phosphor/active layer | show ๐
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protective layer/overcoat | show ๐
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show | carbon or bakelite
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what are the two ways that phosphor crystals are aranged in a psp plate | show ๐
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what does speed class affect | show ๐
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what is the purpose to the exposure index | show ๐
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what is the first step in the conversion of a latent image to manifest image in the IRD | show ๐
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what is the second step in the conversion of a latent image to manifest image in the IRD | show ๐
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what is the third step in the conversion of a latent image to manifest image in the IRD | show ๐
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show | *dynamic range *quantization
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Created by:
bigad1982
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