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Use of Fat-Suppressed T2-Weighted MRI Images to Reduce the Magic Angle Effect in Peroneal Tendons

Edmund Ieong1, Michael Rafferty1, Monica Khanna1

  • 1Imperial Healthcare NHS Trust, St Mary's Hospital, London, UK.

Foot & Ankle Specialist
|December 20, 2018
PubMed
Abstract

Insights

T2 fat-suppressed sequences significantly reduce the magic angle effect (MAE) in peroneal tendon MRI scans. This improvement in magnetic resonance imaging (MRI) helps avoid misdiagnosis and guides better patient management.

Area of Science:

  • Radiology
  • Musculoskeletal Imaging
  • Orthopedics

Background:

  • Peroneal tendon disorders present diagnostic challenges.
  • Magnetic resonance imaging (MRI) is crucial for assessing tendon pathology.
  • The magic angle effect (MAE) is a known MRI artifact that can lead to misdiagnosis.

Purpose of the Study:

  • To evaluate if T2 fat-suppressed sequences (T2FSs) reduce the incidence of MAE compared to proton density fat-suppressed (PDFS) images.
  • To improve the accuracy of MRI in diagnosing peroneal tendon disorders.

Main Methods:

  • Prospective assessment of MRI scans from 18 patients.
  • Evaluation of peroneal tendons at 5 defined levels on both PDFS and T2FS images.
  • Comparison of MAE frequency between the two MRI sequences.

Main Results:

  • MAE was reduced by 85% in the peroneus brevis tendon (17/72 levels on PDFS vs. 2/72 on T2FS, P = .0003).
  • MAE was reduced by 71% in the peroneus longus tendon (14/72 levels on PDFS vs. 4/72 on T2FS, P = .02).

Conclusions:

  • T2-weighted sequences are beneficial in peroneal tendon MRI to mitigate MAE.
  • Using T2FS can help avoid potential misdiagnosis of peroneal tendon disorders.
  • This technique aids in guiding appropriate management of peroneal tendon conditions.
Keywords:
MRI scanmagic angle effectperoneal tendon tearperoneal tendonitis

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