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Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
09:30

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Published on: December 18, 2016

Rigid-body motion correction with self-navigation MRI.

Jason Mendes1, Eugene Kholmovski, Dennis L Parker

  • 1Utah Center for Advanced Imaging Research, University of Utah, Salt Lake City, Utah 84108, USA.

Magnetic Resonance in Medicine
|December 20, 2008
PubMed
Summary
This summary is machine-generated.

Phase correlation accurately measures motion during turbo-spin-echo MRI by analyzing repeated echotrains. This technique allows for precise motion detection and correction, improving image quality in medical scans.

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Area of Science:

  • Medical Imaging
  • Signal Processing
  • Physics

Background:

  • Motion artifacts are a significant challenge in Magnetic Resonance Imaging (MRI), particularly in fast imaging sequences like turbo-spin-echo (TSE).
  • Accurate detection and correction of rigid-body translational motion are crucial for diagnostic image quality.

Purpose of the Study:

  • To review and apply phase correlation for detecting rigid-body translational motion within individual echotrains in TSE MRI.
  • To demonstrate a method for measuring motion between repeated echotrain acquisitions and adjacent k-space data.
  • To investigate the feasibility of complete motion history determination and artifact correction using this technique.

Main Methods:

  • Phase correlation was applied to individual echotrains acquired twice for motion detection.
  • Subsampled correlation was used to generate delta-functions for motion measurement between acquisitions.
  • Correlation was also performed between adjacent, equally spaced k-space measurements.
  • Motion history was determined by measuring motion between all adjacent k-space subgroups.

Main Results:

  • The subsampled correlation of repeated echotrains successfully provided an array of delta-functions, enabling motion measurement.
  • A comparable correlation was identified between adjacent sets of equally spaced k-space measurements.
  • The complete motion history of a subject could be determined by analyzing adjacent k-space subgroups.
  • Motion artifacts in turbo-spin-echo head and hand images were investigated, revealing limiting factors of the technique.

Conclusions:

  • Phase correlation is an effective method for measuring rigid-body translational motion in TSE MRI data.
  • This technique allows for the determination of complete motion history and subsequent correction of motion artifacts.
  • The study explored the practical application and limitations of phase correlation in TSE imaging, with implications for improved MRI scan quality.