IMPEDANCE IMAGING USING INDUCED CURRENTS

The principal features of an electrical impedance tomography system us ing induced currents are described. Images of the distribution of cond uctivity in a two-dimensional phantom are obtained using an algorithm based on a sensitivity matrix. Results are also presented which demons trate the separation of conductivity and permittivity images from meas urements of the complex peripheral voltage, the formation of unreferen ced permittivity images, and the use of capacitively coupled electrode s in a measuring system without direct electrical contact.d