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Related Experiment Videos

Phase-locked loop techniques applied to ultrasonic Doppler signal processing

A Sainz, V C Roberts, G Pinardi

    Ultrasonics
    |May 1, 1976
    PubMed
    Summary
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    A novel method accurately measures blood flow velocity and acceleration in real-time. This technique provides instantaneous peak and mean velocity data, along with acceleration, for display on standard recording systems.

    Area of Science:

    • Biomedical Engineering
    • Cardiovascular Physiology
    • Signal Processing

    Background:

    • Accurate measurement of blood flow dynamics is crucial for diagnosing and monitoring various cardiovascular conditions.
    • Existing methods for assessing blood flow velocity and acceleration may have limitations in real-time data acquisition and display.

    Purpose of the Study:

    • To introduce a new, on-line method for measuring blood flow velocity and acceleration.
    • To demonstrate the capability of obtaining instantaneous peak velocity, mean velocity, and acceleration using simple recording systems.

    Main Methods:

    • The study describes a novel measurement technique utilizing analogue and phase locked loop (PLL) technologies.
    • This approach enables the real-time computation and display of key hemodynamic parameters.

    Related Experiment Videos

    Main Results:

    • Instantaneous peak velocity, instantaneous mean velocity, and acceleration were successfully obtained on-line.
    • The measured data were displayed on simple recording systems, indicating the method's practical applicability.

    Conclusions:

    • The developed method offers a straightforward and effective means for real-time assessment of blood flow velocity and acceleration.
    • This technique has the potential to enhance clinical monitoring and research in cardiovascular hemodynamics.