Title :
Noise reduction and spectrum analysis in Doppler blood flow signal processing
Author :
Jin, X.C. ; Gao, S.K. ; Shen, Y.H.
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., China
Abstract :
In this paper a real-time Doppler module is introduced. In order to reduce the noise and artifacts in the Doppler path, several efforts including emission waveform modification, orthogonal signal generator, range gating of signals, wall filters, section shielding and proper power supply and ground system are implemented. Spectrum estimation methods based on Fast Fourier Transformation (FFT) are carefully investigated with different window type selection, pre and post processing of the data. Finally this Doppler module is embedded into a mother ultrasonic sector scanner, CX-960-II, and high quality Doppler blood flow spectrum images are obtained
Keywords :
Doppler measurement; biomedical ultrasonics; fast Fourier transforms; haemodynamics; image scanners; medical signal processing; real-time systems; spectral analysis; Doppler blood flow signal processing; Fast Fourier Transformation; artifact reduction; mother ultrasonic sector scanner; noise reduction; orthogonal signal generator; power supply; range gating; real-time Doppler module; section shielding; spectrum analysis; wall filters; window type selection; Blood flow; Filters; Hardware; Noise generators; Noise reduction; Power measurement; Signal analysis; Signal generators; Signal processing; Spectral analysis;
Conference_Titel :
Networks, 1993. International Conference on Information Engineering '93. 'Communications and Networks for the Year 2000', Proceedings of IEEE Singapore International Conference on
Print_ISBN :
0-7803-1445-X
DOI :
10.1109/SICON.1993.515650
