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. 2021 Jan 7;48(6):1842–1853. doi: 10.1007/s00259-020-05131-z

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© The Author(s) 2021

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Fig. 4 — a MSE and b MRE (%) computed between actual PET scans and the NS estimated with ScaleNet (green) and cGAN (red) in the GM, WM, and reference region. (t) refers to measurements obtained from the 40 scans used for training and evaluation, while (u) refers to measurements obtained from 132 remaining unseen scans. ROI for WM was eroded to avoid contamination from specific uptake from the GM