Multi-electrode systems for electrical impedance imaging

Multi-electrode systems for electrical impedance tomography.

A wide range of electrode system designs is reviewed for their possible use in UT

Active Electrode Based Electrical Impedance Tomography System

Abstract: EIT can image the distribution of ventilated lung tissue, and is thus a promising technology to help monitor patient breathing to help selection of mechanical ventilation parameters. Two key di culties in EIT instrumentation make such monitoring di cult: 1) EIT data quality depends on good electrode contact and is sensitive to changes in contact quality, and 2) EIT electrodes are di c...

Electrical impedance tomography with compensation for electrode positioning variations.

Ideally electrical impedance tomography (EIT) should not be oversensitive to electrode positions, but this conflicts with efforts to produce high-resolution images. Two procedures are presented that balance reducing the sensitivity to electrode position errors with generating practicable EIT images. The first provides a criterion based on electrode sensitivity for regularizing the reconstructio...

Accounting for erroneous electrode data in electrical impedance tomography.

An unfortunate occurrence in experimental measurements with electrical impedance tomography is electrodes which become detached or poorly connected, such that the measured data cannot be used. This paper develops an image reconstruction methodology which allows use of the remaining valid data. A finite element model of the EIT difference imaging forward problem is linearized as z = Hx, where z ...

Advanced Electrode Models and Numerical Modelling for High Frequency Electrical Impedance Tomography Systems