The Volterra functional method is used for the electromagnetic inverse problem. A general analytical procedure and symbolic computer code implementation are successfully constructed that provides an alternative way for the inverse problem. The conductivity profiles, as an example, are reconstructed by the method. The results show that using only three terms of an expansion gives an obvious improvement when compared with former approximations.

• Received 24 March 1994

DOI:https://doi.org/10.1103/PhysRevE.50.551