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Am J Physiol Heart Circ Physiol. 2010 May;298(5):H1626-32. doi: 10.1152/ajpheart.00713.2009. Epub 2010 Feb 19.

A real-time device for converting Doppler ultrasound audio signals into fluid flow velocity.

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  • 1Heart & Vascular Institute, Penn State-Hershey, 500 University Drive, Hershey, PA 17033, USA. mherr1@hmc.psu.edu

Abstract

A Doppler signal converter has been developed to facilitate cardiovascular and exercise physiology research. This device directly converts audio signals from a clinical Doppler ultrasound imaging system into a real-time analog signal that accurately represents blood flow velocity and is easily recorded by any standard data acquisition system. This real-time flow velocity signal, when simultaneously recorded with other physiological signals of interest, permits the observation of transient flow response to experimental interventions in a manner not possible when using standard Doppler imaging devices. This converted flow velocity signal also permits a more robust and less subjective analysis of data in a fraction of the time required by previous analytic methods. This signal converter provides this capability inexpensively and requires no modification of either the imaging or data acquisition system.

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