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Electrode positions and current patterns for 3D EIT Y. Mamatjan1, D. Gursoy2 and A. Adler1

Summary: Electrode positions and current patterns for 3D EIT
Y. Mamatjan1, D. G¨ursoy2 and A. Adler1
1Carleton University, Ottawa, Canada
2Institute of Medical Engineering, Graz University of Technology, Austria
Abstract: For a 3D electrical impedance tomography (EIT) system, it is necessary
to improve electrode geometries placed around a body surface, and correspondingly
apply stimulation and measurement patterns to produce maximum distinguishabil-
ity. Advanced EIT image reconstruction requires designing systems with the elec-
trode geometry and current injection such that the full ensemble of measurements
provides as high SNR as possible over all of the volume under investigation not only
for over a certain region of interest. A 3D two-electrode plane simulation study is
undertaken using 7 electrode geometries and 16 different stimulation and measure-
ment patterns for each electrode geometry. The simulation results show that several
electrode geometries and current patterns produced promising results with the high
distinguishability which can subsequently lead to improved image reconstruction.
1 Introduction
In Electrical Impedance Tomography (EIT), several publications [1, 2] reported that the
linear relationship between global tidal impedance variation and tidal volume cannot be
used to calculate end-expiratory lung volume (EELV), since EELV is a global parameter
of the whole lung while impedance is measured only at one thoracic level that reflects the


Source: Adler, Andy - Department of Systems and Computer Engineering, Carleton University


Collections: Computer Technologies and Information Sciences