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2003, Number 2

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Rev Mex Ing Biomed 2003; 24 (2)

Bidirectional Doppler System for Blood Flow Measurement based on an Open Architecture

García F, Moreno E, Solano J, Barragán M, Sotomayor A, Fuentes M

Language: Spanish
References: 22
Page: 135-143
PDF size: 193.91 Kb.


ABSTRACT

This paper describes the design of a continuous wave blood flow bi-directional Doppler system based on an open, high-resolution architecture that is portable and low-cost. The system incorporates the advantages of expensive systems with dedicated hardware. The system is composed of a flow detector probe, a signal conditioning stage, a direction detection module, a signal processing stage and a GUI. The direction detection of the signal is achieved using a fast digital Phasing Filter. The Doppler signal is processed by a Short-Time Fourier Transform-based algorithm. This is commonly used as a reference. Nevertheless, the system allows us to incorporate alternative high-resolution spectral estimation methods that might offer more precise information to the specialist.


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