A reconstruction algorithm for time harmonic impedance imaging based on the Modified Perturbation Method (MPM) is proposed. Both the object conductivity (σ) and permittivity (ε) are reconstructed. First the forward problem is solved for a complex dielectric constant using a quasistatic approximation valid up to 100MHz in conjunction with first order absorbing boundary conditions. Then a Jacobian matrix representing the sensitivities with respect to conductivity and permittivity is obtained in close form expressions. Finally, this Jacobian matrix is appropriately introduced into the MPM after the necessary modifications, enabling the reconstruction of εr and σ. A number of computer phantom tests prove the validity of the method.
|Title of host publication||PIERS 2004 - Progress in Electromagnetics Research Symposium, Extended Papers Proceedings|
|Number of pages||4|
|Publication status||Published - 2004|
|Event||PIERS 2004 - Progress in Electromagnetics Research Symposium - Pisa, Italy|
Duration: 28 Mar 2004 → 31 Mar 2004
|Other||PIERS 2004 - Progress in Electromagnetics Research Symposium|
|Period||28/03/04 → 31/03/04|