Fig. 7.
Results from conductivity optimization for individual subjects based on the current injection experiments. (a) The differences between the measured and simulated magnetic fields. The three plots show the differences calculated for the RL, AP, and for both electrode montages, respectively. Each plot displays the error for all three time-matched measurements and for simulated magnetic fields using literature conductivities (Lit), conductivities optimized for one electrode montage (OPTRLor OPTAP), and conductivities optimized for both montages combined (OPTComb). The horizontal orange lines indicate the medians, the black boxes extend from 25th to 75th percentile, and the whiskers indicate the full range. The lines between the box plots connect the same subject before and after optimization (the full and dashed lines in the two first plots are for the optimization for the single montage and both montages, respectively.) (b) The mean and standard error of the conductivities for all five subjects optimized individually. Optimization was performed for RL and AP individually (blue and orange) as well as combined (green). The black dashed lines indicate the upper and lower bounds used in the optimizations while the red dashed lines are the literature conductivities.