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. 2019 Nov 5;9:16041. doi: 10.1038/s41598-019-52175-9

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© The Author(s) 2019

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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(a) Experimental configuration for the sample observation. OCM en-face images of the reflective resolution test target through 0.5, 1.0, and 1.5 mm thick tissue phantom obtained by (b) 1700 nm and (c) 1300 nm SD-COM. The images in (b,c) are shown in a linear scale. The graphs in (b) and (c) show the averaged intensity profiles of areas indicated by the yellow boxes in the OCM en-face images. (d) The relationship between SBR and thickness of the tissue phantom.