Figure 4
From: Magnetic field compensation coil design for magnetoencephalography

Target grids Target points \({\mathscr {T}}_{\mathrm{opt}}\) are marked with \(+\)-crosses and enclosed inside a circle with diameter 0.7 m. Validation points \({\mathscr {T}}_{\mathrm{val}}\) are marked with dots and enclosed inside a circle of 0.6 m diameter. Point sets are depicted in orthographic view from the z axis.