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Abstract #2288

Experimental validation of simulated implant heating induced by switched gradient fields

Rüdiger Brühl1, Thomas Schwenteck1, Bernd Ittermann1, Fabio Baruffaldi2, Alessandro Arduino3, Umberto Zanovello3, Luca Zilberti3, Mario Chiampi3, and Oriano Bottauscio3
1Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany, 2IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy, 3Istituto Nazionale di Ricerca Metrologica (INRIM), Torino, Italy

Switching MR gradients induce eddy-currents in metallic implants. Gradient-aggressive MR sequences were used on a commercial 3 T scanner to heat orthopaedic prostheses ex vivo. Heating experiments are presented, and the measured temperature evolution is compared with corresponding numerical results. Numerical simulations have been successfully validated for five MR sequences at different implant position and orientations in the gradient field.

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