Abstract
Numerous attempts have been made to improve image reconstruction algorithms in EIT. In contrast, the magnitude of measurement errors of an EIT system was not an exploratory focus in the past. Especially in absolute EIT (a-EIT) where the resistivity of the examined object is determined on an absolute scale the influence of these errors can not be ignored since systematic errors are not cancelled by dividing the raw data by reference data (cf. Sheffield back projection). We present very simple phantoms and provocative adapters for a 16 electrode system using adjacent drive pattern to determine the measurement errors. The trans-impedance of each phantom is determined by only one component and output voltage is constant for all combinations of current injection and measurement. Therefore the electrical properties of the phantoms can be determined fast and precisely. Input and output impedance can be chosen independently of output voltage similar to that of the human thorax. Parameters like the absolute error of each driving/sensing channel, signal to noise ratio in each channel and especially the several kinds of crosstalk can be determined.
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© 2007 Springer-Verlag Berlin Heidelberg
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Hahn, G., Just, A., Hellige, G. (2007). Determination of the dynamic measurement error of EIT systems. In: Scharfetter, H., Merwa, R. (eds) 13th International Conference on Electrical Bioimpedance and the 8th Conference on Electrical Impedance Tomography. IFMBE Proceedings, vol 17. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73841-1_84
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DOI: https://doi.org/10.1007/978-3-540-73841-1_84
Publisher Name: Springer, Berlin, Heidelberg
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