Current density impedance imaging (cdii)

Details Current density impedance imaging (cdii) Current density impedance imaging (cdii)

G - Physics

01

R

G01R 27/02 (2006.01) A61B 5/053 (2006.01) G01N 27/02 (2006.01) G01R 33/20 (2006.01)

Patent

CA 2480430

A method for non-invasive mapping (imaging) of the electrical impedance of an object. The present invention provides a method, current density impedance imaging (CDII) which produces an impedance image of object by measuring current density distributions and directly calculating the local impedance values. The method includes making measurements of at least two current density vector fields, J1 and J2, within a region of interest in an object and then calculating the logarithmic gradient of local conductivity, ~ In .delta.(x, y, z) , using a formula (see formula I) where ~1 (x, y, z) and ~2 (x, y, z) , are the pair of measured nonparallel current densities at point (x,y,z) and ~ denotes the gradient operator.

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