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Video 3-1: Video of the cervical lymph node illustrating the use of overall gain and time gain compensation (TGC) controls.

From: Critical Care Ultrasonography, Second Edition

Note the side bar on the right side of the screen reflecting the amount of amplification applied to the signal (either overall or the echoes) returning from the specific depth (time of flight is used to determine the position of the boundary.).

27 secs
Author(s) Alexander B. Levitov, Joseph John
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