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. 2018 Feb 1;8:2049. doi: 10.1038/s41598-018-20530-x

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© The Author(s) 2018

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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The reconstructions of multi-slice ptychographic tomography using (a) 18, (b) 10 and (c,d) 6 angular measurements. For (d), good slices reconstructions from the case of complete 90 angles are used for the angle extension here. The top row is the x-z cross-sections of the 3D sample reconstruction at the positions indicated by the red line. The bottom row is the central y-z cross-sections. In each pane, the left hand side is the reconstruction after the angle extension and the right hand side is the reconstruction without the angle extension.