Use of backscattered Doppler signal intensity in estimation of volume flow ratios

Grading of mitral regurgitation based on intensity analysis of the continuous wave Doppler signal

“…Concerns can be raised on whether the full cross-sectional regurgitant area is insonated by the CW Doppler beam 29. The CW Doppler beam width at the focus point in our system is 9 mm in azimuth (see online supplementary results), thus including a clinical relevant range of regurgitant areas.…”