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. 2021 Aug 18;11:16738. doi: 10.1038/s41598-021-95808-8

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© The Author(s) 2021

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Sample images of ECD SPECT and eFBB PET scans of patients with PD. Sample images are visualized in 10-step colored images (upper row) and grey-scale images (lower row). Abbreviations ECD, Tc-99m ethyl cysteinate dimer; eFBB, early-phase F-18 Florbetaben; PD, Parkinson’s disease; PET, positron emission tomography; SPECT, single photon emission computed tomography; SUV, standardized uptake value.