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Related Experiment Videos

Double loop receiver coil for MR imaging at 0.15 T.

E W Akins, J R Fitzsimmons, A A Mancuso

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

    A novel double loop receiver coil significantly enhances signal-to-noise ratio (S/N) for medical imaging. This improved coil offers better image quality and faster scan times for various anatomical regions.

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    Area of Science:

    • Magnetic Resonance Imaging (MRI) Coil Design
    • Medical Imaging Technology
    • Biomedical Engineering

    Background:

    • Conventional surface coils in MRI often exhibit limitations in signal-to-noise ratio (S/N) and signal homogeneity, particularly at increasing depths.
    • Existing MRI coil technologies may restrict the ability to achieve high-resolution imaging or require longer scan times due to suboptimal S/N.
    • Improvements in receiver coil design are crucial for advancing diagnostic capabilities in various anatomical regions.

    Purpose of the Study:

    • To develop and evaluate a novel cross-coupled, double loop receiver coil for improved MRI performance.
    • To assess the signal-to-noise (S/N) ratio and signal homogeneity of the new coil compared to conventional designs.
    • To demonstrate the coil's utility in imaging specific anatomical areas such as the lumbar spine, heart, pelvis, hip, and shoulder.

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    Main Methods:

    • Development of a cross-coupled, double loop receiver coil geometry.
    • Performance evaluation using a 0.15 T resistive MRI instrument.
    • Comparative analysis of S/N and signal intensity with a commercial half-saddle body coil and an oval surface coil, particularly for lumbar spine imaging.

    Main Results:

    • The developed double loop coil demonstrated significantly higher S/N ratios, ranging from 51% to 256% improvement compared to a commercial half-saddle body coil.
    • The new coil provided more homogeneous signal intensity at increasing depths, outperforming a conventional oval surface coil in lumbar spine imaging.
    • The coil enables reduced pixel volume via higher field gradients and thinner slices, or time savings through fewer signal averages.

    Conclusions:

    • The cross-coupled, double loop receiver coil offers superior S/N and homogeneity, enhancing MRI capabilities.
    • This coil design allows for improved image resolution and/or reduced scan times, benefiting various clinical applications.
    • While sensitive to respiratory motion artifacts and subject size limitations, the double loop coil substantially improves imaging of the heart, pelvis, hip, and shoulder.