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Related Experiment Videos

NMR blood flow imaging using multiecho, phase contrast sequences.

M O'Donnell

    Medical Physics
    |January 1, 1985
    PubMed
    Summary
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    Moving nuclei exhibit a phase shift detectable by balanced gradients, enabling flow velocity measurement. A novel scan sequence combines phase contrast and multiple echoes for simultaneous anatomical and blood flow imaging.

    Area of Science:

    • Medical Imaging
    • Biophysics
    • Fluid Dynamics

    Background:

    • Nuclear phase shifts occur with motion in balanced gradients.
    • This phenomenon can quantify nuclear flow velocity.
    • Current methods may lack simultaneous anatomical and flow data.

    Purpose of the Study:

    • To present a novel scan sequence for blood flow imaging.
    • To demonstrate simultaneous acquisition of anatomical and flow data.
    • To validate the accuracy of the proposed method.

    Main Methods:

    • Utilized a phase contrast approach with multiple echoes.
    • Developed a specific magnetic resonance imaging (MRI) scan sequence.
    • Acquired data from a phantom and a human volunteer.

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    Main Results:

    • The scan sequence successfully generated both anatomical and blood flow images.
    • Phase shift monitoring accurately measured nuclear flow velocity.
    • Validation in phantom and volunteer confirmed method accuracy.

    Conclusions:

    • The presented scan sequence enables accurate, simultaneous blood flow and anatomical imaging.
    • Phase shift analysis is a viable method for quantifying nuclear flow.
    • This technique has potential applications in various medical imaging scenarios.