RIU 324 Study Guide - Final Guide: Sonographer, Grayscale, Lead Zirconate Titanate
12 Mar 2020
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Performed twice: once by the system and cannot be adjusted; second to adjust grayscale. Can be performed by sonographers, also called log compressio dynamic range. ratio of largest to smallest signal a system can faithfully represent . Reduce the dr by mapping a larger range of signal into a smaller range of signals. How does compression result in loss of information? the surrounding tissue or medium. An important signal could be compressed out of visibility relative to. Changing electrical signals into a form more suitable for display into positive voltages. Smoothing (enveloping): reduces high freq voltages or bumps into the voltage signal. Places a smooth line around the bumps and evens them out. No visible effect on the us image. The purpose is to change the form of the electrical signal so that it is appropriate for the system"s displays. What is reject and what is the threshold? aka threshold or suppression.
