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Velocity encoding using ghost artifacts

B Madore1, R M Henkelman

  • 1Department of Medical Biophysics, University of Toronto, Ontario, Canada.

Magnetic Resonance in Medicine
|June 1, 1996
PubMed
Summary
This summary is machine-generated.

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This study uses deliberate motion artifacts in MRI to encode velocity information faster. By superposing ghosting artifacts, velocity is encoded in both magnitude and phase using fewer images.

Area of Science:

  • Medical Imaging
  • Physics

Background:

  • Motion artifacts are a major challenge in Magnetic Resonance Imaging (MRI).
  • Existing methods for motion artifact correction are often insufficient or complex.

Purpose of the Study:

  • To develop a novel method for faster velocity encoding in MRI.
  • To utilize motion artifacts, rather than suppress them, for encoding flow information.

Main Methods:

  • Deliberately created motion artifacts (ghosting) to encode velocity.
  • Superposition of ghosting artifacts of different orders.
  • Retrieval of 2D complex intensity and velocity information from two images.

Main Results:

  • Velocity information encoded in both image phase and magnitude.

Related Experiment Videos

  • Reduced number of required images from three to two for velocity measurement.
  • Achieved faster velocity-encoding process.

    • Conclusions:

    • Motion artifacts can be repurposed as a tool for efficient velocity encoding in MRI.
    • This technique offers a faster alternative for flow imaging at the cost of increased equation complexity and reduced signal-to-noise ratio.