Ultrasound Post Processing: Making adjustments to Recalled Images.
©Walter Rasmussen, R.D.C.S.
Post processing refers to ultrasound adjustments that can be made after the image has been captured in a cine-loop and upon playback when a study is finalized. Traditional post processing adjustments are available as a knob or tab that applies different post-processing curves as a list of options for changing contrast on the image.
On current ultrasound machines, post processing options can also include adjustments to primary adjustments such as Gain, Two-Dimensional Gain, TGC, LGC, Color Doppler Gain, PW Doppler Gain, CW Doppler Gain, Dynamic Range and Compression however, these adjustments do not have the same effect as when the image is live.
Post processing can be very valuable for enhancing an image. For example, if the Gain level cannot be adjusted high enough on the live image, further increases in Gain can be made once the image is captured, making a great deal of difference in the diagnostic quality of the image.
Upon starting to work with a new ultrasound machine, experiment with all of the adjustments mentioned in this chapter in order to learn which have been included as post-processing options and their effects.
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