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. 2017 Aug 3;7:7188. doi: 10.1038/s41598-017-07694-8

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© The Author(s) 2017

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Segmentation of the right bundle branch. The high resolution (73 × 73 × 73 µm³) micro-CT data from the whole human heart, showing the 3D extent and position of the segmented right bundle branch (red in panel d) on the lateral aspect of the interventricular septum (c,d), as viewed from within the right ventricular cavity. Illustrative long-axis micro-CT sections showing the proximal (a) and distal (b) aspects of the right bundle branch. From the view in (d) a part of the so-called dead-end tract at the anterior/rostral extent of the atrioventricular conduction axis can be identified (purple). The position of the cross-sections (a,b) are shown in the 3D volume rendering in (c). Ao- Aortic root, AVCA- atrioventricular conduction axis, CS- coronary sinus, IVS- interventricular septum, MS- membranous septum, RBB- right bundle branch.