Simple, Accurate and Efficient Multilayer Integral Method for Eddy Current Simulation in Thin Volumes of Arbitrary Geometry Produced by MRI Gradient Coils

Hector Sanchez Lopez¹, Fabio Freschi², Adnan Trakic¹, Elliot Smith¹, Jeremy Herbert¹, Miguel Fuentes¹, Stephen Wilson¹, Limei Liu¹, Maurizio Repetto², Stuart Crozier¹

We present a new accurate and efficient eddy current simulation method capable of calculating induced currents in finite thickness conducting volumes of arbitrary geometry induced by arbitrary arrangements of gradient coils. The method has been experimentally validated using a z-gradient coil and its performance tested against COMSOL and the Fourier Network method. We present an example to demonstrate the capabilities of the method in terms of predicting the induced currents, power losses and pre-emphasis simulations using the excited eigenvalue corresponding to the surrounding structure. The method is accurate and fast enough to be performed in a laptop Intel corei7 CPU.