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. 2022 Dec;12(12):5326–5342. doi: 10.21037/qims-22-116

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2022 Quantitative Imaging in Medicine and Surgery. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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Training pair examples of four typical slices used in our experiment. Slices A and B are from the upper regions of the head, while C and D are from the lower regions. PET, positron emission tomography; MRI, magnetic resonance imaging.