Computationally efficient methods are presented which allow calculation of switched-gradient-induced electric field distributions on realistically sized body model with uniform interior properties (compatible with regulatory IEC standards). Electric fields were calculated for three classes of gradient coils (asymmetric head, symmetric head and body gradients) using 100-member male and female body model populations; these were then used to estimate population-mean PNS parameters which were validated against experimental PNS measurements, showing high accuracy. Our computationally efficient methods can calculate whole-body E-field distributions in seconds with updates for different gradient designs in tens of milliseconds, providing an important tool for PNS-constrained gradient design.
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