The Pole Distribution of Audio Doppler Signals

from the Umbilical Blood Flow and its Feature Analysis

Chen Sizhong, Wang Yuanyuan, Wang Weiqi

Abstract   A pole model is constructed in this paper to describe audio Doppler signals from the umbilical blood flow. Poles varying with the time is first analyzed, then some parameters are extracted as the clinical criterion of gravidity diseases. The analysis results of several cases show that the method using these parameters are better than the conventional one such as spectrogram parameters on veracity. An ultrasound instrument with this technique will be a new effective tool in clinic use.

Keywords   Audio Doppler, Blood flow analysis, Pole model, Real & conjugated roots.