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Related Experiment Videos

Unilateral MRI using a rastered projection.

Christina L Bray1, Joseph P Hornak

  • 1Magnetic Resonance Laboratory, Center for Imaging Science, Rochester Institute of Technology, Rochester, NY 14623-5604, USA.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|July 27, 2007
PubMed
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Unilateral magnetic resonance imaging offers a novel approach for analyzing samples not suited for conventional systems. This technique uses a disc magnet and RF coil to create detailed tomographic images with high resolution.

Area of Science:

  • Magnetic Resonance Imaging
  • Spectroscopy
  • Medical Imaging

Background:

  • Conventional magnetic resonance systems have limitations in accommodating certain sample types.
  • Unilateral magnetic resonance techniques offer an alternative for specialized sample analysis.
  • Stray field magnetic resonance imaging provides unique imaging capabilities.

Purpose of the Study:

  • To describe a unilateral magnetic resonance imaging (MRI) approach.
  • To demonstrate proof of concept for a novel MRI device.
  • To characterize the performance of the unilateral MRI system.

Main Methods:

  • Utilized stray magnetic field from a disc magnet and a butterfly geometry RF coil.
  • Acquired tomographic projections by translating the RF coil.

Related Experiment Videos

  • Reconstructed images using backprojection of angular projections.
  • Operated the device at 12.4 MHz.

    • Main Results:

    • Constructed and characterized a proof-of-concept unilateral MRI device.
    • Achieved a field of view of 1.2-4 cm with a slice thickness of 102 micrometers.
    • Measured an edge spread function (ESF) indicating a 4mm full width at half maximum (FWHM) line spread function (LSF).
    • Presented reconstructed images from phantom studies.

    Conclusions:

    • The developed unilateral MRI technique is capable of producing tomographic images.
    • This method allows for the analysis of samples incompatible with conventional MRI systems.
    • The proof-of-concept device demonstrates the feasibility of stray field unilateral MRI.