Patent ID: 6501984
Filing Date: 2002-12-31
Classification: A61B

Abstract:
A method of determining electrical impedance tomography of a conductive volume (12) comprising the steps of selecting, in turn, each of a plurality of pairs of locations (S) upon a surface of the volume (12) and supplying a stimulation current to the surface by way of the selected pair of locations, and recording, for each selected pair, a resulting potential difference between at least one pair (R) of the remaining locations, and processing the recorded potential differences to plot electrical conductivity distribution within said volume, and, for a particular pair of locations stimulated, selecting from among the remaining locations, for recordal, the pair or pairs of locations which, if stimulated, would produce an electric field with vectors most closely aligned with the corresponding vectors of the electric field produced by stimulation of said particular pair of locations, and recording said potential difference at the said pair or pairs of locations so selected for recordal.