Title :
The Research on Doppler Ultrasonic Blood Flow Signals under Periodically Pulsatile Flow Based on STFT
Author :
Wang, Lifang ; Zhou, Xiaohua
Author_Institution :
Dept. of Autom. Control & Mech. Eng., Kunming Univ., Kunming, China
Abstract :
As a noninvasive method, the Doppler ultrasound technique is used to detect cardiovascular disease. Doppler ultrasonic signals of periodic oscillatory blood flow in the circular tube were simulated in this paper. Firstly, by solving the Navier_Stokes equations of periodically oscillatory blood flow, the distributions of pressure gradient and blood velocity in varying-area vessel were obtained. Then, the Doppler ultrasound blood flow signals were simulated using the cosine summation method. Finally, to illustrate this method, simulated Doppler signals were analyzed using the short-time Fourier transform (STFT), which can provide a valid approach for the analysis of Doppler ultrasound signals.
Keywords :
Fourier transforms; Navier-Stokes equations; biomedical ultrasonics; cardiovascular system; haemodynamics; pulsatile flow; Doppler ultrasonic blood flow signals; Navier-Stokes equations; STFT; blood velocity; cardiovascular disease; circular tube; cosine summation method; noninvasive method; periodic oscillatory blood flow; pressure gradient; pulsatile flow; short time Fourier transform; Blood flow; Doppler effect; Electron tubes; Fourier transforms; Mathematical model; Time frequency analysis; Ultrasonic imaging; Doppler ultrasound signal; Pulsatile blood flow; STFT; Velocity distribution;
Conference_Titel :
Biomedical Engineering and Biotechnology (iCBEB), 2012 International Conference on
Conference_Location :
Macau, Macao
Print_ISBN :
978-1-4577-1987-5
DOI :
10.1109/iCBEB.2012.440