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MR imaging of the brachial plexus: comparison between 1.5-T and 3-T MR imaging: preliminary experience

Alberto Tagliafico1, Giulia Succio, Carlo Emanuele Neumaier

  • 1Department of Radiology, National Institute for Cancer Research, Genova, Italy. atagliafico@sirm.org

Skeletal Radiology
|October 26, 2010
PubMed
Abstract

Insights

Three-Tesla (3T) magnetic resonance (MR) imaging offers superior brachial plexus nerve visibility compared to 1.5-T MR imaging. Both field strengths effectively detect pathological findings, with 3T providing enhanced signal and contrast ratios.

Area of Science:

  • Radiology
  • Medical Imaging
  • Neuroimaging

Background:

  • Brachial plexus imaging is crucial for diagnosing neurological conditions.
  • Magnetic resonance imaging (MRI) is a key modality for visualizing the brachial plexus.
  • Comparing different magnetic field strengths (1.5T vs. 3T) is essential for optimizing imaging protocols.

Purpose of the Study:

  • To compare the diagnostic performance of 1.5-Tesla (T) and 3-T magnetic resonance (MR) imaging for the brachial plexus.
  • To evaluate image quality metrics including signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR).
  • To assess the visibility of brachial plexus nerves at various anatomical locations.

Main Methods:

  • Prospective MR imaging of 30 healthy volunteers and 30 patients with brachial plexus disturbances.
  • Utilized comparable sequence parameters and coils on both 1.5-T and 3-T systems.
  • Included T1- and T2-weighted turbo spin-echo sequences with fat saturation; analyzed SNR, CNR, and nerve visibility using a grading scale.

Main Results:

  • Significantly higher SNR and CNR were observed with 3-T MR imaging compared to 1.5-T MR imaging.
  • Nerve visibility was significantly superior on 3-T MR images across all evaluated anatomical levels.
  • Pathological findings were equally well visualized, and MR imaging diagnoses did not differ between the two field strengths.

Conclusions:

  • High-quality brachial plexus MR images are achievable with 3-T systems using protocols similar to 1.5-T.
  • 3-T MR imaging demonstrates superior visibility of brachial plexus nerve trunks and cords in both healthy individuals and patients.
  • 3-T MR imaging represents an advancement for brachial plexus assessment.

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