Patent ID: 6865494

Claim:
A method of determining the conductivity of a sample as a function of position, comprising: measuring electromagnetic fields from a sample via a plurality of probes, wherein the plurality of probes detect time-varying electromagnetic fields; determining the measured correlation, M ij (Ω), between at least one pair of probes; determining the conductivity of the sample as a function of position, based on the following relationship; M ij ⁡ ( Ω ) = ∫ Ω ⁢ E ⇀ i ⁡ ( σ , x ) · σ ⁡ ( x ) · E ⇀ j ⁡ ( σ , x ) ⁢ ⁢ ⅆ x where σ(x) is the complex conductivity tensor of the sample as a function of position and E j (σ, x) is the electric field created in the sample at position x by probe j when driven by a unit source.