Abstract
In this paper the analytical expressions for the magnetic field H and induction B in iron-pole plates generated by MRI gradient coil are given using line-current and the multilayer dielectric plate model with the mirror-image method. Eddy current emanates from the magnetic flux in the iron-pole plates. In order to fully suppress the eddy current, this magnetic flux should be fully eliminated. The research results indicate the magnetic permeability of the resist-eddy plate must be bigger than that of magnetic pole material, i.e. pure iron, and that the resist-eddy plate should be thick enough to be far away from its magnetic saturation.
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