Time domain electromagnetic tomography using propagation and backpropagation method

This paper presents a new time domain electromagnetic tomographic imaging algorithm using the propagation and back propagation method by solving a time dependent Maxwell's equation. The proposed algorithm reconstructs an extended object immersed in inhomogeneous medium using wide band electromagnetic pulse excitation. In this paper we develop an iterative yet convergent algorithm for reconstructing the dielectric profiles of the scattering medium for electromagnetic tomographic imaging purposes. The imaging algorithm employs the finite difference time domain forward propagation solver. The backpropagation solver iteratively reconstructs the object of interest. Using numerical examples, we demonstrate that the proposed algorithm results in high quality images with fast convergence.