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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