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Updated: Jan 20, 2026

A Novel Application of Musculoskeletal Ultrasound Imaging
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A Novel Application of Musculoskeletal Ultrasound Imaging

Published on: September 17, 2013

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In-phase zero TE musculoskeletal imaging.

Mathias Engström1, Graeme McKinnon2, Cristina Cozzini3

  • 1GE Healthcare, Stockholm, Sweden.

Magnetic Resonance in Medicine
|August 21, 2019
PubMed
Summary
This summary is machine-generated.

A new in-phase zero echo time (ipZTE) MRI method eliminates fat-water artifacts for clearer musculoskeletal imaging. This technique improves signal-to-noise ratio and is valuable for PET/MR imaging and radiation therapy planning.

Keywords:
ZTEartifactchemical shiftcorrectionin-phasemusculoskeletal

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Physics
  • Biomedical Engineering

Background:

  • Zero Echo Time (ZTE) MRI is a 3D radial imaging technique.
  • ZTE is susceptible to chemical shift artifacts at fat-water interfaces.
  • These artifacts degrade image quality, particularly in musculoskeletal applications.

Purpose of the Study:

  • Introduce a novel in-phase ZTE (ipZTE) method for musculoskeletal MRI.
  • Address and eliminate fat-water chemical shift artifacts in ZTE imaging.
  • Enhance image quality and diagnostic utility of ZTE MRI.

Main Methods:

  • The ipZTE method acquires each 3D radial spoke multiple times with varying readout gradient amplitudes.
  • Varying gradient amplitudes alter effective sampling times for each spoke.
  • K-space-based chemical shift decomposition reconstructs in-phase and out-of-phase components.

Main Results:

  • ipZTE was evaluated in knee, pelvis, brain, and whole-body scans.
  • Resulting images exhibited excellent soft-tissue uniformity, free from ZTE-specific artifacts.
  • Chemical shift decomposition improved signal-to-noise ratio (SNR) at a minor cost to image resolution.

Conclusions:

  • The ipZTE method effectively eliminates fat-water chemical shift artifacts.
  • It serves as an averaging mechanism to enhance SNR in ZTE imaging.
  • ipZTE is anticipated to advance ZTE-based musculoskeletal imaging and pseudo-CT generation for PET/MR and radiation therapy planning.