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Quadrature detection surface coil.

J S Hyde, A Jesmanowicz, T M Grist

    Magnetic Resonance in Medicine
    |February 1, 1987
    PubMed
    Summary
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    A novel surface coil design improves magnetic resonance imaging (MRI) signal-to-noise ratio by 2.5 times. This advancement enhances imaging of the temporomandibular joint (TMJ) at 1.5 Tesla.

    Area of Science:

    • Magnetic Resonance Imaging
    • Medical Device Engineering
    • Biophysics

    Background:

    • Surface coils are crucial for MRI signal reception.
    • Optimizing coil design can significantly improve image quality and diagnostic capabilities.
    • Decoupling resonators is essential for multi-channel coil performance.

    Purpose of the Study:

    • To describe a novel surface coil assembly for 1.5 T MRI.
    • To achieve intrinsic decoupling between coil elements.
    • To evaluate the signal-to-noise ratio (SNR) improvement for temporomandibular joint (TMJ) imaging.

    Main Methods:

    • Designed a surface coil with two interleaved, coplanar resonators.
    • Ensured intrinsic decoupling between the resonators.
    • Measured on-axis vector reception fields at 3 cm depth.

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  • Combined both components of magnetization for signal reception.

    • Main Results:

    • The two resonators were intrinsically decoupled.
    • On-axis vector reception fields at 3 cm depth were orthogonal and of equal magnitude.
    • A 2.5-fold improvement in signal-to-noise ratio was achieved for TMJ images.

    Conclusions:

    • The described surface coil assembly effectively improves SNR in 1.5 T MRI.
    • This design offers enhanced imaging performance for specific anatomical regions like the TMJ.
    • The intrinsic decoupling method is a viable strategy for advanced MRI coil development.