A set of specifications thought useful to advance the utility of elect
rical impedance tomography as a clinical imaging modality is proposed,
together with an approach to image reconstruction designed to fulfil
these specifications. Computer simulations are used to investigate the
performance of this reconstruction approach on simple, known, impedan
ce distributions and to develop the method to the stage of a complete
reconstruction algorithm. The algorithm is then tested on data sets pr
oduced by measurements on a physical phantom, and on a set of measurem
ents made on a volunteer human subject