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. 2023 Sep 30;51(2):496–509. doi: 10.1007/s00259-023-06437-4

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Fig. 4 — Peak tumor-to-background ratio (TBR_peak) variations for different glioma grades. a There was a significant difference between grade 2 and 4 gliomas, and between grade 3 and 4 gliomas, but not between grade 2 and 3 gliomas. b A significant difference was also observed between grade 2 and grade 3–4 gliomas