Fig. 8
From: Head phantoms for bioelectromagnetic applications: a material study
Measurement schemes for isotropic (top) and anisotropic (bottom) impedance measurements. The cell with a material sample (brown) in plastic tubes filled with NaCl solution (light gray) incorporates the paired measurement electrodes (black filled dots) and the outer electrode pair (black outlined dots) for current application, both being connected to the Gamry Reference 600 Plus impedance analyzer. Sealing rings (yellow) and POM flanges (dark gray) complete the setup (adapted from [31])