Comparison of tissue conductivities measured (S/m) by an impedance analyzer using a four-probe method and conductivity values averaged over phantom regions of interest for chicken, potato or agar materials from the image shown in Fig 6, using the proposed method and the two-current injection DT-MREIT algorithm [33].

The longitudinal and transverse components of the conductivity, Cl = λC,1 and Ct = (λC,2+λC,3)/2 were calculated from the eigenvalues (λC,1≥λC,2≥λC,3) of the reconstructed conductivity tensor. Effective isotropic conductivities of potato and agar backgrounds were calculated using the relation, [29] for potato and agar regions for comparison with impedance analyzer measurements.