(PWV), the velocity peaks, the average velocity of a cardiac cycle ([V.sub.mean]), and the indexes that relate the systolic and diastolic velocities: pulsatility index (PI), given by (PSV-EDV)/[V.sub.mean]; resistance index (RI), given by (PSV-EDV)/PSV; and peak ratio (PR), ...
[E.sub.xy(mean)] = [square root of 2] X 0.5 X pxl, [E.sub.z(mean)] = c / [b.sub.x] [E.sub.xy(mean)], (4) Accuracy analysis of measuring close-range image points using manual and stereo modes Where [Y.sub.t] is a (pxl) random time series vector (the variables with...