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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. 6 — Reconstruction of simulated blood vessels in the limited-view case of 80° using the proposed method. (a1)-(a5) depict the reconstruction results over iterations using the method proposed in this study, respectively. (b1)-(b5) represent the reconstruction results over iterations using FS-DM, respectively. (c1)-(c5) show the reconstruction results over iterations using LS-DM, respectively. (a6)-(c6) are the same ground truths. (d)-(e) represent the close-up images indicated by red rectangles 1 and 2 over iterations, respectively. (f)-(g) illustrate the changes of PSNR and SSIM over iterations, respectively. Ours, the approach utilizing multi-scale diffusion models; FS-DM, a diffusion model trained using the fully-sampled sinogram dataset; LS-DM, a diffusion model trained using the sinogram dataset in the limited-view case of 240°; GT, ground truth.