Comparison of electrical conductivities of various brain phantom gels: Developing a 'brain gel model'

► Agar, agarose and gelatin were doped with 0-1 mg/ml of NaCl. ► Conductivities of these gels were measured at 22 °C and 37 °C, and in the 100-500 Hz frequency range. ► Overall, σ increased with NaCl concentration and temperature, and was independent of frequency. ► Frequency independent formulae for predicting the conductivity of each of the gels were generated. ► Results can be used in preparation of brain phantoms.