Detection of Doppler Microembolic Signals Using High Order Statistics

Figure 1

A typical embolus detection system including standard detection and our new detection procedure. Unit A includes extracting 10 s digital Doppler signal sequences from the SD card extracted from the Holter system, calculating the short time Fourier transform, and lastly calculating the instantaneous energy from STFT estimators. Unit B represents the detection achieved using standard methods while Unit C represents the new detection procedure we have developed based on skewness and kurtosis calculation.