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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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Published on: February 12, 2014

Two-dimensional phase correction method for single and multi-shot echo planar imaging.

Yuval Zur1

  • 1GE Healthcare, Haifa, Israel. yuval.zur@ge.com

Magnetic Resonance in Medicine
|May 17, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a novel phase correction algorithm to effectively suppress ghost artifacts in echo planar imaging (EPI). The method significantly improves image quality for both single and multi-shot EPI sequences.

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Area of Science:

  • Medical Imaging
  • Magnetic Resonance Imaging (MRI)

Background:

  • Ghost artifacts are a significant challenge in echo planar imaging (EPI), degrading image quality.
  • Consistent suppression of these coherent artifacts is crucial for accurate diagnosis.

Purpose of the Study:

  • To present a novel phase correction algorithm for robust ghost artifact suppression in EPI.
  • To demonstrate the algorithm's effectiveness in both single and multi-shot EPI sequences.

Main Methods:

  • A double field of view (FOV) prescan is utilized to compute the necessary phase correction.
  • Phase correction is applied in both the x (readout) and y (phase) directions.
  • The computed phase is fitted to a 2D polynomial for image correction.

Main Results:

  • The algorithm achieves excellent ghost suppression across various readout gradient polarities and shot numbers.
  • Phantom and volunteer imaging confirmed superior artifact reduction compared to conventional methods.
  • A flowchart visually details the correction process.

Conclusions:

  • The proposed phase correction algorithm offers a significant advancement in mitigating ghost artifacts in EPI.
  • This technique enhances the reliability and diagnostic utility of EPI across different acquisition schemes.