Impedance imaging using induced currents.
The principal features of an electrical impedance tomography system using induced currents are described. Images of the distribution of conductivity in a two-dimensional phantom are obtained using an algorithm based on a sensitivity matrix. Results are also presented which demonstrate the separation of conductivity and permittivity images from measurements of the complex peripheral voltage, the formation of unreferenced permittivity images, and the use of capacitively coupled electrodes in a measuring system without direct electrical contact.
Department of Electronic and Electrical Engineering, University of Sheffield, UK.
I L
IL
Freeston
R C
RC
Tozer
D000465:Algorithms; D017097:Electric Impedance; D004566:Electrodes; D007091:Image Processing, Computer-Assisted; D008954:Models, Biological; D014054:Tomography / Q000295:instrumentation / Q000379:methods*