Title :
Real-time digital processing of Doppler ultrasound signals
Author :
Bambi, Giacomo ; Fidanzati, Paolo ; Morganti, Tiziano ; Ricci, Stefano ; Tortoli, Piero
Author_Institution :
Electron. & Telecommun. Dept., Universita degli Studi di Firenze, Italy
Abstract :
Ultrasound equipment allows an early diagnosis of cardiovascular diseases to be obtained through the appropriate processing of received echo signals. In this paper a real time digital implementation of processing algorithms dedicated to investigate both the hemodynamic and mechanic properties of large human arteries is described. In particular, an FFT analysis is used to obtain the information about the blood flow, and an autocorrelation-based procedure is applied to estimate the tissue movements. Furthermore, a real-time software approach for audio processing is shown capable of generating directional Doppler signals and of reproducing them on a standard personal computer (PC). Finally, a summary of the system capabilities is presented by showing the results of application of the above procedures to common carotid artery investigation.
Keywords :
Doppler measurement; audio signal processing; biological tissues; biomedical ultrasonics; correlation methods; fast Fourier transforms; haemodynamics; medical signal processing; real-time systems; Doppler ultrasound signals; FFT analysis; audio processing; autocorrelation-based procedure; blood flow; cardiovascular disease diagnosis; carotid artery investigation; directional Doppler signals; hemodynamic properties; large human arteries; mechanic properties; real-time digital processing; tissue movement estimation; Arteries; Autocorrelation; Blood flow; Cardiovascular diseases; Hemodynamics; Humans; Information analysis; Mechanical factors; Signal processing; Ultrasonic imaging;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
Print_ISBN :
0-7803-8874-7
DOI :
10.1109/ICASSP.2005.1416469