Figure 7.
Beamformer (SAM) reconstruction inaccuracies due to skull anisotropy: Volume constraint. Forward model: 1:10 anisotropic FEM with volume constraint (skull conductivity: μrad = 0.000905 S/m, μtang = 0.00905 S/m). Inverse model: Isotropic FEM (skull conductivity of 0.0042 S/m). Sensor configuration: Full coverage (258 sensors). [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]