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A field-gradient coil using concentric return paths

W W Brey1, T H Mareci, J Dougherty

  • 1Center for Structural Biology, University of Florida, Gainesville, Florida, 32610-0245, USA.

Journal of Magnetic Resonance. Series B
|August 1, 1996
PubMed
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A new transverse field-gradient coil design places current elements in planes perpendicular to the main magnetic field. This method optimizes the linear field region for applications like magnetic resonance imaging of the head.

Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Coil Design Engineering

Background:

  • Transverse field-gradient coils are crucial for MRI, but existing designs have limitations in linear region extent.
  • Optimizing the linear field region is key to improving image quality and coverage.

Purpose of the Study:

  • To present a novel transverse field-gradient coil design.
  • To maximize the linear volume of the coil structure.
  • To enable unobstructed magnetic resonance imaging of the human head.

Main Methods:

  • Locating all current elements in planes perpendicular to the main magnetic field.
  • Implementing a concentric return path within the same plane as field-producing arcs.
  • Stacking planar units to achieve desired field-gradient configurations.

Related Experiment Videos

  • Optimizing linear-field region size by adjusting current and plane locations.

    • Main Results:

    • The proposed coil design allows the linear volume to extend nearly to the coil ends.
    • The design enables optimization of the linear-field region size and length-to-diameter ratios.
    • A prototype coil demonstrated successful performance in imaging, confirming the analytical predictions.

    Conclusions:

    • This approach offers a versatile method for designing transverse field-gradient coils.
    • The design is particularly suitable for magnetic resonance imaging of the head, avoiding shoulder obstruction.
    • The optimized linear field region enhances the potential for advanced MRI applications.