An instantaneous frequency dispersion estimator for detecting high intensity transient signals in human blood flow

This paper addresses the problem of automatic detection of High Intensity Transient Signals (HITS) in Doppler waveform. The aim of this work is to detect the passage of small particles in the human blood flow in order to prevent the formation of an arterial stenosis. Most existing methods are based on the short time Fourier transform of the Doppler ultrasound signal. We present an instantaneous frequency dispersion estimator for performing the automatic detection of HITS. After presenting the detection procedure, we also compare the detection results to that obtained by human experts. Finally, we comment the results and the limitations of this approach.