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. 2022 Jun 28;15:27. doi: 10.1186/s13039-022-00604-2

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 1 — Some typical ultrasound performance in these cases. a The right kidney (RK) of Case 1 showed multicystic dysplastic kidney. b Case 2 showed atrioventricular ratio is out of balance. c The ultrasound image of Case 3 showed the characteristic double bubble sign. d The image of Case 4 showed that two blue blood flow signals of the left and right ventricles respectively enter the aorta. e Case 5 showed mild stenosis of the pulmonary artery. f On the Four-Chamber View, Case 8 showed that the blood flows across the septum. LV left ventricle, LA left atrium, RV right ventricle, RA right atrium, D duodenum, St stomach, AO aorta, PA pulmonary artery, VSD ventricular septal defect