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. 2015 Oct 7;30:161–165. doi: 10.1007/s00540-015-2084-y

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© The Author(s) 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Images of electrical impedance tomography (EIT) at the end of inspiration before and after prone positioning. An image was divided into four layers from ventral to dorsal.The right lung is presented at the left side of the image. Regions with impedance changes of <10 % and >10 % of the determined maximum regional impedance change are represented in black and blue, respectively. As the impedance values increase, the blue turns lighter blue. A white color indicates the regions of maximum regional impedance change (i.e., 100 %) within the image. Left; before prone positioning trial, center; 20 min after the start of first trial, right; 20 min after the start of second trial