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. 2019 Oct 10;19:179. doi: 10.1186/s12871-019-0848-x

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© The Author(s). 2019

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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Sonographic image of the gastric antrum in the semi-recumbent position. Ultrasound examinations were conducted with a low-frequency curvilinear array probe from a Philips (CX50), showing an empty gastric antrum (a), liquid (b) and semi-solid (c) food in the gastric antrum. A sagittal cross-section of the antrum in a plane, including the left lobe of the liver anteriorly, the pancreas and aorta posteriorly was acquired. A, antrum; L, liver; P, pancreas; SA, splenic artery; SV, splenic vein; Ao, aorta; SMV, superior mesenteric vein