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. 2019 Jan 7;19:3. doi: 10.1186/s12880-018-0302-4

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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. 3 — Exemplary comparisons of catheter-enhanced and unprocessed direct radiographs. a A central catheter is inserted in a vein of the right upper limb and ends in the superior vena cava. Main diagnosis: Left-to-right shunting with pulmonary hypervolemia, shortly after surgical ligation of a patent ductus arteriosus (PDA). b A central catheter is inserted in a vein of the right upper limb and ends in the right atrium. Main diagnosis: Infant respiratory distress syndrome (IRDS). c A central catheter is inserted in a vein of the left upper limb and ends in the superior vena cava. Main diagnosis: Two-sided pneumonia, left-sided pneumothorax. d A central catheter is inserted in a vein of the right upper limb and ends in the superior vena cava. Main diagnosis: Transient tachypnea of the newborn (TTN)