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Metal artefact suppression at 3 T MRI: comparison of MAVRIC-SL with conventional fast spin echo sequences in patients with Hip joint arthroplasty

  • Magnetic Resonance
  • Published:
European Radiology Aims and scope Submit manuscript

Abstract

Objective

The aim of our study was to evaluate the clinical feasibility and diagnostic value of a new MRI metal artefact reduction pulse sequence called MAVRIC-SL in a 3 T MRI environment.

Subjects and methods

Two MAVRIC-SL sequences obtained in 61 patients with symptomatic total hip replacement were compared with standard FSE-STIR sequences optimized for imaging around metal. Artefact size was measured on the slice of greatest extent. Image quality, fat saturation, image distortion, visibility of anatomical structures, and detectability of joint abnormalities were visually assessed and graded on qualitative scales. Differences between MAVRIC-SL and FSE sequences were tested with the Wilcoxon signed-rank test.

Results

MAVRIC-SL sequences at 3 T showed significantly smaller metal artefacts compared to FSE-STIR sequences (p < 0.0001). The general image quality of MAVRIC-SL sequences was reduced with regard to spatial resolution, noise and contrast (p = 0.001), and fat saturation (p < 0.0001). The reduction of artefact size and image distortion significantly improved visualization of joint anatomy (p < 0.0001) and diagnostic confidence regarding implant-associated abnormalities (p = 0.0075 to <0.0001).

Conclusion

Although the image quality of MAVRIC-SL sequences is limited at 3 T, its clinical application is feasible and provides important additional diagnostic information for the workup of patients with symptomatic hip replacement through substantially reduced metal artefacts.

Key Points

• Metal artefacts compromise imaging of total hip replacement with MRI.

• Metal artefacts are aggravated with 3 Tesla MRI.

• MAVRIC-SL is a technique to suppress metal artefacts.

• MAVRIC-SL effectively reduces metal artefacts at 3 Tesla and improves diagnostic quality.

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Acknowledgments/Disclosures

Scientific guarantor of this publication is Prof Thomas M. Link. The authors of this manuscript declare relationships with the following companies: General Electric Healthcare. This study has received funding by General Electric Healthcare and National Institutes of Health (NIH). Grant numbers U01 AR059507, R01 AR057336 and P50 AR060752. We thank General Electric Healthcare for research funding and support. M.K. recieved grants from the Gottfried and Julia Bangerter-Rhyner Foundation. One of the authors Mrs Gabby B. Joseph has significant statistical expertise. Institutional review board approval was obtained. Written informed consent was obtained from all subjects (patients) in this study. Methodology: prospective, cross sectional study performed at one institution.

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Authors and Affiliations

  1. Musculoskeletal Quantitative Imaging Research Group, Department of Radiology & Biomedical Imaging, University of California San Francisco, 185 Berry Street, San Francisco, CA, 94107, USA

    Martin Kretzschmar, Lorenzo Nardo, Misung M. Han, Ursula Heilmeier, Craig Sam, Gabby B. Joseph, Roland Krug & Thomas M. Link

  2. Departments of Biophysics and Radiology, Medical Collage of Wisconsin, Milwaukee, WI, USA

    Kevin M. Koch

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  1. Martin Kretzschmar
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  2. Lorenzo Nardo
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Correspondence to Martin Kretzschmar.

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Kretzschmar, M., Nardo, L., Han, M.M. et al. Metal artefact suppression at 3 T MRI: comparison of MAVRIC-SL with conventional fast spin echo sequences in patients with Hip joint arthroplasty. Eur Radiol 25, 2403–2411 (2015). https://doi.org/10.1007/s00330-015-3628-0

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  • DOI: https://doi.org/10.1007/s00330-015-3628-0

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