Couple Electromagnetic and Neuronal Dynamics Simulation of Gradient Coil Switching Induced Nerve Stimulation
Ioannis Vogiatzis Oikonomidis 1,2 , Esra Neufeld 1 , Johanna Wolf 1 , Deepika Sharma 1,3 , Yngve Hamnerius 2 , and Niels Kuster 1,3
IT'IS Foundation, Zurich, Switzerland,
and Systems, Chalmers University of Technology,
Technology and Electrical Engineering, Swiss Federal
Institute of Technology, Zurich, Switzerland
Nerve stimulation by rapidly switching gradient coils is
a safety concern in MR. An EM and thermal simulation
platform has been coupled with a neuronal dynamics
modeling code, to investigate such interactions in
realistic anatomical models. A locally temperature
dependent variant of the SENN model, commonly employed
for safety threshold assessment, has been developed.
Modeling of sciatic nerve stimulation by gradient coil
switching, considering the impact of RF birdcage coil
induced heating, showed that the model anisotropy, the
field variation along the nerve and local temperature
have a relevant impact that can be studied using the
coupled EM-neuron simulation platform.
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