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. 2024 Sep 13;40:100646. doi: 10.1016/j.pacs.2024.100646

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© 2024 The Authors

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 7 — The reconstruction results of the blood vessel simulation dataset on the sinogram domain under different limited imaging conditions. (a1)-(a4) depict the reconstructed sinograms using the DAS method in limited-view cases of 105°, 80°, 60° and 45°, respectively. (b1)-(b4) show the reconstructed sinograms using the U-Net method in limited-view cases of 105°, 80°, 60° and 45°, respectively. (c1)-(c4) show the reconstructed sinograms using the GAN method in limited-view cases of 105°, 80°, 60° and 45°, respectively. (d1)-(d4) show the reconstructed sinograms using the FS-DM method in limited-view cases of 105°, 80°, 60° and 45°, respectively. (e1)-(e4) represent the reconstructed sinograms using the method proposed in this study in limited-view cases of 105°, 80°, 60° and 45°, respectively. (a5)-(e5) are the same ground truths. Ours, the approach utilizing multi-scale diffusion models; FS-DM, a diffusion model trained using the fully-sampled sinogram dataset; GT, ground truth.