Thoracic EIT in 3D: experiences and recommendations

Objective : In EIT applications to the thorax, a single electrode plane has typically been used to
reconstruct a transverse 2D ‘slice’. However, such images can be misleading as EIT is sensitive to
contrasts above and below the electrode plane, and ventilation and aeration inhomogeneities can be
distributed in complex ways. Using two (or more) electrode planes, 3D EIT images may be
reconstructed, but 3D reconstructions are currently little used in thoracic EIT. In this paper, we
investigate an incremental pathway towards 3D EIT reconstructions, using two electrode planes to
calculate improved transverse slices as an intermediate step. We recommend a specific placement of
electrode planes, and further demonstrate the feasibility of multi-slice reconstruction in two
species. Approach : Simulations of the forward and reconstructed sensitivities were analysed for two
electrode planes using a ‘square’ pattern of electrode placement as a function of two variables: the
sti...

Source: Physiological Measurement - July 31, 2019 Category: Physiology Authors: Bart łomiej Grychtol, Johannes Peter Schramel, Fabian Braun, Thomas Riedel, Ulrike Auer, Martina Mosing, Christina Braun, Andreas D Waldmann, Stephan H Böhm and Andy Adler Source Type: research