Figure 6.

(a): number of adaptive refinement steps taken by each subject to achieve convergence for the 7-tissue models under TES. (b): average (16 subjects) and maximum (16 subjects) inter-step E-field and charge solution vector errors at the end of each adaptive mesh refinement step. (c): average and maximum GMRES iterations required by each AMR step. Note that the average includes entries of 0 for models that had converged prior to the given step; this decision was made to give a reasonable average runtime estimate for large numbers of models. (d)–(f): the same information is presented for the 14-tissue models under TES.