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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.
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Question
Answer
voxel   show
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IRD   show
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what are some other terms for CR   show
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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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turbid phosphor   show
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europium   show
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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
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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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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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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
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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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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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protective layer/overcoat   show
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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
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what does speed class affect   show
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what is the purpose to the exposure index   show
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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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what is the second step in the conversion of a latent image to manifest image in the IRD   show
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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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Created by: bigad1982
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