Influence of reconstruction settings in electrical impedance tomography on figures of merit and physiological parameters

Objective : Electrical impedance tomography (EIT) is a non-invasive and relatively cheap imaging
technique allowing continuous monitoring of lung function at the bedside. However, image
reconstruction and processing are not yet standardized for clinical use, limiting comparability and
reproducibility between studies. In addition, optimal reconstruction settings still have to be
identified for different clinical applications. In this work (i) a systematic way to select ‘good’
EIT algorithm parameters is developed and (ii) an evaluation of these parameters in terms of correct
functional imaging and consistency is performed. Approach : First, 19  200 reconstruction models are
generated by full factorial design of experiment in 5D space. Then, in order to quantify the quality
of reconstruction, known conductivity changes are introduced and figures of merit (FoM) are
calculated from the response image. These measures are further used to select a subset of
reconstruction m...

Source: Physiological Measurement - September 28, 2019 Category: Physiology Authors: F Th ürk, M Elenkov, A D Waldmann, S Böhme, C Braun, A Adler and E Kaniusas Source Type: research