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Abstract #4878

Heating of bilateral hip prostheses in a human body model induced by a multi-axis gradient coil set

Hector Sanchez-Lopez 1 , Luca Zilberti 2 , Oriano Bottauscio 2 , Jeffrey Hand 3,4 , Annie Papadaki 5 , Fangfang Tang 1 , Mario Chiampi 6 , and Stuart Crozier 1

1 School of Information Technology & electrical Engineering, The University of Queensland, Brisbane, QLD, Australia, 2 Istituto Nazionale di Ricerca Metrologica, Torino, Torino, Italy, 3 Centre for the Developing Brain, Kings College London, London, United Kingdom, 4 Division of Imaging Sciences and Biomedical Engineering, Kings College London, London, United Kingdom, 5 Neuroimaging Analysis Centre, University College London Hospitals, London, United Kingdom, 6 Dip. Energia, Politecnico di Torino, Torino, Italy

Heating Ti6Al4V and CoCrMo bilateral hip prostheses in a human body voxel model exposed to individual and combined 1 kHz magnetic fields associated with a conventional multi-axis gradient (30 mT m-1) coil set was predicted using a non-commercial frequency-domain code based on hybrid finite element (FE) - boundary element (BE) method. For CoCrMo (Ti6Al4V) prostheses, maximum increases of 1.2 (0.7), 0.3 (0.18) and 1.4 (1.2) oC were predicted, respectively, for x, y and z coils individually and of 2.0 (1.2) oC when combined. The temperature rise when all three gradients are used intensively is of concern, particularly for CoCrMo implants.

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