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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Eur J Nucl Med Mol Imaging. 2020 Jun 13;47(13):2998–3007. doi: 10.1007/s00259-020-04897-6

Figure 3.

Figure 3

Representative amyloid positive (top)/negative (bottom) images, with T1-weighted MRI and the corresponding PET images overlaid onto the T1 images. Difference images between the ground-truth and the other images are also shown. All synthesized images show marked noise reduction. However, Method A images are blurrier than the other synthesized images. Network training methods: A-direct application of pre-trained network; B-transfer learning starting with pre-trained network; C-training new network from scratch; D-training new network with combined datasets