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Validation of a CT method for flow determination. Work in progress.

D F Guthaner, M Nassi, B Bradley

    Radiology
    |May 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

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    The dynamic computed tomographic (DCT) method accurately measures flow using indicator dilution curves. This validated CT technique shows promise for characterizing blood flow in animal models.

    Area of Science:

    • Medical Imaging
    • Fluid Dynamics
    • Biomedical Engineering

    Background:

    • Venoarterial indicator dilution curves are utilized for flow determination.
    • Dynamic computed tomographic (DCT) imaging offers a potential method for flow measurement.

    Purpose of the Study:

    • To validate the accuracy of the DCT method for flow determination.
    • To optimize experimental parameters for ideal mixing in flow measurements.
    • To assess the feasibility of DCT for blood flow characterization in animal models.

    Main Methods:

    • A simple model with a tube and mixing chamber was used.
    • 16 consecutive 3-second scans of an 8-mm thick section were acquired.
    • Experiments were conducted with tube diameters of 8 mm and 20 mm.

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  • Flow rates ranged from 0.7-2.7 liters per minute.

    • Main Results:

    • The DCT method demonstrated good accuracy with a 17% error.
    • A correlation coefficient of 0.85 was found between measured and calculated flow.
    • No statistically significant difference was observed between measured and calculated flow (P = .25).

    Conclusions:

    • The DCT method is a validated technique for flow determination.
    • The experimental setup achieved ideal mixing conditions for accurate flow measurement.
    • DCT shows potential for future application in animal models for blood vessel flow characterization.