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. 2020 Feb 21;8:10. doi: 10.1186/s40635-020-0298-2

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© The Author(s). 2020

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. 1 — Representative image of regional distribution of pulmonary ventilation as recorded by electrical impedance tomography (EIT) in one piglet from the control group. Three regions-of-interest (ROIs) of the same vertical height were constructed from top (anterior) to bottom (posterior) of the lung: nondependent, middle, and dependent ROI. In this ventilation map, lighter blue indicates greater ventilation than darker blue, with white representing the greatest ventilation. A = anterior; P = posterior; L = left; R = right