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postprocessing

   Also found in: Wikipedia 0.01 sec.
postprocessing
[-pros′əsing]
(in ultrasonics) manipulation and conditioning of signals and image data after they emerge from the scan converter and before they are displayed. Postprocessing is used to change the assignment of image brightness versus echo signal amplitude in memory.


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These include increasing the echo time, which allows greater time for the dephasing of the paramagnetic signal; thinner scanning sections, which increase the signal-to-noise ratio; increasing the magnetic field strength; and image postprocessing techniques such as susceptibility-weighted imaging, which "incorporates the phase shift as well as the magnitude effects of the iron deposits to increase their visibility.
 
 
 
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