Spectral Analysis of Doppler Ultrasound Blood Flow Signals from Stenosed Vessel in a Steady Flow

A simulation approach was proposed to analyze the spectra of Doppler signals from stenoed artery in a steady flow, which can provide a useful guidance for detecting the formation understanding, diagnosis and treatment of many cardiovascular diseases. Firstly, by solving Navier-Stokes equations, the velocity distributions in the vessels with various stenoed degrees are calculated. Secondly, power spectral density (PSD) of the Doppler signals is estimated according to the relationship of velocity profiles and power spectral density. Finally, Doppler signals are generated using cosine-superposed methods. The results show that the spectra of Doppler signals are similar to those found in practice. Therefore, the proposed approach is useful for simulating the spectra of Doppler ultrasound signals from stenoed artery in a steady flow.