Abstract #3285

Numerical approach to quantify MR imaging artifacts at metallic orthopedic implants at 1.5T, 3T, and 7T

Tobias Spronk^1,2,3, Oliver Kraff¹, Gregor Schaefers^3,4, and Harald H. Quick^1,2

¹Erwin L. Hahn Institute for MR Imaging, University of Duisburg-Essen, Essen, Germany, ²High-Field and Hybrid MR Imaging, University Hospital Essen, University Duisburg-Essen, Essen, Germany, ³MRI-STaR Magnetic Resonance Institute for Safety, Technology and Research GmbH, Gelsenkirchen, Germany, ⁴MR:comp GmbH, Testing Services for MR Safety & Compatibility, Gelsenkirchen, Germany

Synopsis

This study evaluates a numerical approach to simulate artifacts due to presence of orthopedic metallic implants in the MR environment. Further to previously published studies, the numerical approach is validated by comparing simulations and measurements of orthopedic implants at three different field strengths (1.5T, 3T, and 7T). Artifact simulations and measurements of the implants show high correlation at all field strengths. The method potentially can be applied to improve the artifacts testing procedure for medical implants according to ASTM F2119. Additionally, the influence of different imaging parameters (echo time and bandwidth) on the artifact size is quantified via numerical simulations.

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