Waveforn Analysis of Doppler Ultrasound Signals by a Microcomputer

We discuss the algorithms used in the analysis of pulsed Doppler blood velocity (BV) signals. The discussion mainly concerns the method used for removing artifact from the BVsignal. Thisselection procedure considerably reduces the variability of the calculated waveform characteristics. As an example, two methods for the calculation of cardiac output from the BV signal were compared and one was found to be considerably superior. The approach used here is fairly general and can be used in other situations involving almost periodic signals.