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. 2020 Mar 2;10:3800. doi: 10.1038/s41598-020-60728-6

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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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Comparison of brain uptake of 1-L- and 1-D-[¹⁸F]FETrp uptake in medulloblastoma in the same mouse bearing a tumor. (a) Top panels show sagittal images following injection of the L-enantiomer, and bottom panels show sagittal images of the same mouse following injection of the D-form. Arrows denote position of the medulloblastoma. (b) Standardized uptake ratios (SUVR) for regions of interest over the medulloblastoma measured at 30 and 60 min post-injection.