Novel Approaches in the Coupled Circuit Simulation of Eddy Currents Induced by Cylindrical Gradient Coils

Solid angle coupled circuit method is proposed for Gz and Gx cylindrical type gradient coils. 3D solid angle was calculated for both coils. Actuance calculation was performed to consider the induction effect to a particular subdomain due to eddy currents in the surrounding subdomains. The degradation of magnetic field inside the materials due to induced antiparallel magnetic moments was also considered in the coupling calculation considering subdomains taken inside the materials. Gradient echo shift experiment was conducted for verification. We found good agreements between simulation and experimental results.

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