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Abstract #0365

MRI Implant Safety: Method for RF Heating In-Vivo-Transfer Required from ASTM Standard F2182

Manuel Murbach1, Thomas Doering2, and Gregor Schaefers2,3
1Murbach EMConsulting, Zurich, Switzerland, 2MR:comp GmbH, Gelsenkirchen, Germany, 3MRI-STaR - Magnetic Resonance Institute for Safety, Technology and Research GmbH, Gelsenkirchen, Germany

This study aims at exploring an alternative method (Tier 2.5) to estimate realistic in vivo E-fields at implant locations by including the directivity and length of the implants, which neglects non-relevant E-field components and too localized averaging schemes. The latest revision of the ASTM standard F2182-19e2 requires establishing a relation of the temperature increase near a metallic implant between A) the experimental measurement and B) the in vivo estimation in a representative patient population. The usage of currently standardized methods results in presumably overly conservative estimations, causing implant labels to be up to a factor 10 more restrictive.

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