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Related Experiment Video

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In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging
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Estimating Pulsatile Flow Velocity using Four-Dimensional Digital Subtraction Angiography.

Ko-Kung Chen, Chung-Jung Lin

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |December 12, 2023
    PubMed
    Summary

    This study demonstrates estimating pulsatile flow velocity using four-dimensional digital subtraction angiography (4D-DSA). A novel method overcomes noise in 4D-DSA data for accurate hemodynamic analysis.

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    Area of Science:

    • Medical Imaging
    • Biomedical Engineering
    • Cardiovascular Research

    Background:

    • Digital subtraction angiography (DSA) is a standard X-ray imaging technique for diagnosing vascular diseases.
    • Two-dimensional DSA (2D-DSA) has enabled estimation of pulsatile velocity by analyzing contrast medium dynamics.
    • Four-dimensional DSA (4D-DSA) offers both structural and temporal data, potentially reducing radiation exposure.

    Purpose of the Study:

    • To evaluate the feasibility of estimating pulsatile flow velocity using 4D-DSA.
    • To develop a method for accurate velocity estimation from potentially noisy 4D-DSA data.
    • To compare 4D-DSA derived velocities with those from 2D-DSA.

    Main Methods:

    • Utilized 4D-DSA data, which captures spatio-temporal contrast medium distribution.
    • Developed an empirical mode decomposition plus autocorrelation-based method to address noise and artifacts in 4D-DSA.
    • Employed 2D-DSA derived pulsatile velocities as a reference for validation.

    Main Results:

    • Successfully estimated pulsatile flow velocities from 4D-DSA data.
    • The proposed method demonstrated effectiveness in overcoming noise and artifacts inherent in 4D-DSA.
    • Validated the accuracy of 4D-DSA velocity estimations against 2D-DSA reference data.

    Conclusions:

    • 4D-DSA is a feasible modality for estimating pulsatile flow velocity.
    • The developed method enhances the reliability of hemodynamic analysis using 4D-DSA.
    • Estimated pulsatile velocities offer a new parameter for hemodynamic studies and real-time monitoring in interventional procedures.