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. 2023 Jun 7;10:368. doi: 10.1038/s41597-023-02259-z

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© The Author(s) 2023

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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Fig. 3 — Analysis of X-ray attenuation through the sample. (a) Rock image taken close to the sample center where the darker regions represent the void spaces (b) User interface showing the cross-sectional intensity variations across the center of the sample (in red). (c) Intensity profile along the red line in (b) with a maximum and minimum signal around 200 and 50 grayscale levels, respectively.