title: A real-time device for converting Doppler ultrasound audio signals into fluid flow velocity.
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.
authors.affiliation: Heart & Vascular Institute, Penn State-Hershey, 500 University Drive, Hershey, PA 17033, USA. mherr1@hmc.psu.edu
authors.forename: Michael D
authors.initials: MD
authors.lastname: Herr
authors.forename: Cynthia S
authors.initials: CS
authors.lastname: Hogeman
authors.forename: Dennis W
authors.initials: DW
authors.lastname: Koch
authors.forename: Anandi
authors.initials: A
authors.lastname: Krishnan
authors.forename: Afsana
authors.initials: A
authors.lastname: Momen
authors.forename: Urs A
authors.initials: UA
authors.lastname: Leuenberger
mesh_terms: D000465:Algorithms; D001158:Arteries / Q000502:physiology*; D002138:Calibration; D003627:Data Interpretation, Statistical; D004581:Electronics; D004867:Equipment Design; D005583:Fourier Analysis; D012039:Regional Blood Flow / Q000502:physiology; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D012984:Software; D018608:Ultrasonography, Doppler / Q000295:instrumentation*