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Orthopedic metal artifact reduction in MRI

White Paper
MRI NetForum Team Philips Healthcare • Netherlands

Orthopedic metal artifact reduction in MRI

S. Hey, D. Hoogenraad, V. Elanchezhian, M. van Meel, F. Admiraal-Behloul




Scanning patients with MR Conditional orthopedic implants can be challenging because of the substantial image artifacts caused by the metal components of the implants.


This White Paper on distortion correction in the presence of a orthopedic implant discusses:


  • Why artifacts occur around metal implants
  • How metal artifacts can be reduced
  • How well O-MAR* and O-MAR XD* reduce metal artifacts
  • Clinical examples
  • Scanning patients with orthopedic implants

  Orthopedic metal artifact correction

  MRI distortion correction in the presence

  of an orthopedic implant


Signal loss caused by field inhomogeneities around metal can be corrected to a certain extent by the use of TSE sequences, and some distortions can be reduced by the choice of scanning parameters such as high bandwidth and thinner slices. However, these measures are very often not sufficient to allow for peri-prosthetic tissue visualization. Metal-induced field inhomogeneities cannot be accurately modeled which is why distortion-corrected MRI near metallic implants should rely, on robust spatial encoding techniques such as O-MAR* and O-MAR XD**.




* Only for use with MR Safe or MR Conditional Implants by strictly following the Instructions For Use.

** Premium distortion correction defined as O-MAR XD* compared to conventional Philips TSE imaging techniques for reduction of susceptibility artifacts caused by the presence of metal.

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Nov 1, 2016

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White Paper
Hip, Hips, implant, Knee, MARS, metal artifact reduction, MR conditional, Musculoskeletal, OMAR, OMAR XD, orthopedic, ScanWise Implant, Spine

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