Doppler Ultrasound Blood Flow Measurement英文电子书.pdf

th 19 INTERNATIONAL CONGRESS ON ACOUSTICS MADRID, 2-7 SEPTEMBER 2007 Doppler Ultrasound Blood Flow Measurement System PACS: 43.35.Yb 1 1 1 García-Nocetti, Fabián ; Solano-González, Julio ; Fuentes-Cruz, Martín ; 2 3 3 Moreno-Hernández, Eduardo ; Villar-Inclán, Alejandro ; Prohias-Martínez, Juán 1 Universidad Nacional Autónoma de México, IIMAS, México D.F., 04510, México; fabian@uxdea4.iimas.unam.mx 2 Instituto de Cibernética, Matemática y Física, La Habana, 10400, Cuba; moreno@icmf.inf.cu 3 Hospital Hermanos Ameijeiras, La Habana, 10300, Cuba; villar@infomed.sld.cu ABSTRACT This work describes a Doppler ultrasound system for measuring blood flow. The system is intended to be used in coronary implants and bypasses. Quantifying the blood flow through these implants/bypasses is an important task to ensure the chirurgical process, thus, reducing both the post-chirurgical and death risks. The system on an open architecture that is portable and low-cost, incorporating the advantages of expensive systems with dedicated hardware. The system incorporates a pulsed-wave bi-directional Doppler ultrasound flow detector working at 8 MHz. Signal conditioning, direction detection, signal processing, spectrogram displaying, parameters calculation, and a database handling subsystem complete the system. A graphical user interface is provided for controlling and monitoring the whole system. Doppler signal is processed using both Fourier Transform-based and Parametric Model-based algorithms, having the facility to incorporate alternati