Title :
Blood and wall signal simulator for Doppler ultrasound signal analysis algorithm development
Author :
Fish, P.J. ; Basto, C. A C ; Vaz, F.
Author_Institution :
Sch. of Informatics, Univ. of Wales, Bangor, UK
Abstract :
Doppler ultrasound instruments, used for the detection and monitoring of vascular disease, require a means of separating the large, low frequency Doppler signal from the vessel wall from the signal arising from blood followed by a means of analysing he blood flow signal in order to characterise the flow conditions. This is normally achieved by using a high-pass filter that removes the signal reflected from the vessel wall. Unfortunately, the filter also removes the low frequency Doppler signals arising from slow moving blood. A better signal segmentation method that reduces the loss of signal from slowly moving blood is needed to permit the measurement of lower blood velocities. A signal simulator that generates Doppler signals that include the contributions from blood and vessel wall will be very useful for the development of new Doppler signal segmentation methods. This work presents a new simulator incorporating the contribution of blood and vessel wall movements; the characteristics of the simulator output signal are similar to those found in practice.
Keywords :
Doppler measurement; acoustic signal processing; biomedical ultrasonics; blood flow measurement; blood vessels; cardiovascular system; medical signal processing; patient monitoring; Doppler ultrasound instruments; Doppler ultrasound signal analysis algorithm development; blood flow signal; blood signal simulator; cardiovascular disease; flow conditions; high-pass filter; large low frequency Doppler signal; low frequency Doppler signals; lower blood velocities; signal segmentation method; slow moving blood; vascular disease detection; vascular disease monitoring; vessel wall signal simulator; Analytical models; Blood flow; Condition monitoring; Diseases; Filters; Frequency; Instruments; Loss measurement; Signal analysis; Ultrasonic imaging;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1018869