Figure 8.

Distance between simulated and fitted dipoles ($d_{\mathrm{s},\mathrm{f}}$) averaged over all 100 time samples and eight subjects in relation to the number of sensors for seven different OPM-MEG configurations. The strength of the ambient noise and the spontaneous brain noise was (a) $\sigma =75 \mathrm{fT}$ and $q_{\mathrm{spont}}=0$, and (b) $\sigma =0$ and $q_{\mathrm{spont}}=3 \mathrm{nAm}$.