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Related Experiment Videos

Applications of multiple quantum coherence to MR imaging.

N M Szeverenyi, E M Haacke

    Journal of Computer Assisted Tomography
    |May 1, 1986
    PubMed
    Summary

    Multiple quantum coherence in magnetic resonance (MR) imaging can distinguish materials. This technique selectively images lactic acid, acting as a natural suppression method for water in biological tissues.

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    Area of Science:

    • Nuclear Magnetic Resonance (NMR) Spectroscopy
    • Medical Imaging Physics
    • Biophysical Chemistry

    Background:

    • Nuclear spin magnetization is crucial for magnetic resonance (MR) detection.
    • Differentiating materials in MR experiments often relies on signal intensity.
    • Multiple quantum coherence offers an alternative contrast mechanism.

    Purpose of the Study:

    • To demonstrate multiple quantum coherence as a method for material differentiation in MR.
    • To showcase selective imaging of specific metabolites.
    • To highlight the utility of double quantum coherence for suppressing dominant signals like water.

    Main Methods:

    • Utilized a pulse sequence incorporating magnetic field gradients and radiofrequency pulses.
    • Employed a phantom model containing water, concentrated lactic acid, and corn oil.
    • Applied double quantum coherence principles for signal manipulation.

    Main Results:

    • Successfully achieved selective imaging of lactic acid within the phantom.
    • Demonstrated that the double quantum experiment acts as a natural suppression technique for water.
    • Showcased the ability to differentiate between various components based on their coherence properties.

    Conclusions:

    • Multiple quantum coherence provides a novel approach for material differentiation in MR.
    • The developed sequence enables selective detection of metabolites like lactic acid.
    • This technique holds promise for MR spectroscopy and imaging of dilute metabolites in biological tissues.

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