Effect of Nyquist limit and color gain on color Doppler signals
by Nanda Navin C

Comprehensive Textbook of Echocardiography

by Navin C Nanda
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In this video clip, the color gain has been increased to 58 units and this has resulted in marked increase in the size of the regurgitant jet (arrowhead). Note also artifactual spillage of color Doppler signals outside the cavity of the right ventricle (RV) resulting from excessive gain.

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