Dependency of reconstruction accuracy on forward field error.

<p>Left image shows dipole locations with deep sources shown in grey and shallower sources shown in black. The plots on the right show temporal correlation between the simulated and beamformer reconstructed sources (i.e. r(<b>q</b>_j,<b>q̂</b>_j)) plotted as a function of fractional error on forward field (‖Δ<b>l</b>_j‖/‖<b>l</b>_j‖). The two separate plots show the case for deep (top) and shallow (bottom) dipoles. The sOPM system is shown in blue and the sSQUID system in red. Note that the improvement in reconstruction accuracy afforded by the OPM based system depends on accurate forward field modelling.