Abstract:
The paper introduces a new dipole like
model for a perturbation induced by a circular slab of
incremental conductivity in a uniform current density
field. The analytical solution for the forward problem is
derived. The dipole model analysis reveals that the
uniform parallel field is not sensitive to spatial
frequencies of the conductivity function. A parallel
impressed field was found to be very accurate in
localizing areas of non homogeneity by their ‘center of
gravity’. A couple of useful properties of the field
projection on curves at distance from non homogeneity
is also described.