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. 2020 May 8;11:2298. doi: 10.1038/s41467-020-16031-z

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© The Author(s) 2020

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. 5 — The final corrected RPO and LAO images are shown. Subfigure (a) organizes the original (labeled Uncorrected) Cherenkov images recorded during 6 MV radiotherapy treatment (units in Cherenkov photons, γ) as compared to the expected surface dose estimate (labeled Dose) from the treatment plan (Gy). After CT attenuation (HU) corrections have been carried out, the corrected Cherenkov images are shown (labeled Corrected). In (b), the same is shown for 10 MV beams. The corrected Cherenkov images qualitatively match the expected surface dose images more closely than the uncorrected images, where further quantitation is presented in Fig. 6.