Papers › Structure-Aware Sparse-View X-ray 3D Reconstruction
Structure-Aware Sparse-View X-ray 3D Reconstruction
Yuanhao Cai, Jiahao Wang, Alan Yuille, Zongwei Zhou, Angtian Wang
X-ray, known for its ability to reveal internal structures of objects, is expected to provide richer information for 3D reconstruction than visible light. Yet, existing neural radiance fields (NeRF) algorithms overlook this important nature of X-ray, leading to their limitations in capturing structural contents of imaged objects. In this paper, we propose a framework, Structure-Aware X-ray Neural Radiodensity Fields (SAX-NeRF), for sparse-view X-ray 3D reconstruction. Firstly, we design a Line Segment-based Transformer (Lineformer) as the backbone of SAX-NeRF. Linefomer captures internal structures of objects in 3D space by modeling the dependencies within each line segment of an X-ray. Secondly, we present a Masked Local-Global (MLG) ray sampling strategy to extract contextual and geometric information in 2D projection. Plus, we collect a larger-scale dataset X3D covering wider X-ray applications. Experiments on X3D show that SAX-NeRF surpasses previous NeRF-based methods by 12.56 and 2.49 dB on novel view synthesis and CT reconstruction. Code, models, and data are released at https://github.com/caiyuanhao1998/SAX-NeRF
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Code Syntology ran Syntology
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Tasks
Datasets
Introduced by this paper, per the archive.
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Low-Dose X-Ray Ct Reconstruction | X3D | SAX-NeRF | PSNR | 37.25 | #1 of 9 | Archive leaderboard | report |
| Low-Dose X-Ray Ct Reconstruction | X3D | SAX-NeRF | SSIM | 0.9753 | #1 of 9 | Archive leaderboard | report |
| Low-Dose X-Ray Ct Reconstruction | X3D | SART | PSNR | 32.33 | #5 of 9 | Archive leaderboard | report |
| Low-Dose X-Ray Ct Reconstruction | X3D | SART | SSIM | 0.9342 | #5 of 9 | Archive leaderboard | report |
| Low-Dose X-Ray Ct Reconstruction | X3D | ASD-POCS | PSNR | 32.32 | #6 of 9 | Archive leaderboard | report |
| Low-Dose X-Ray Ct Reconstruction | X3D | ASD-POCS | SSIM | 0.9400 | #6 of 9 | Archive leaderboard | report |
| Low-Dose X-Ray Ct Reconstruction | X3D | FDK | PSNR | 25.12 | #9 of 9 | Archive leaderboard | report |
| Low-Dose X-Ray Ct Reconstruction | X3D | FDK | SSIM | 0.6422 | #9 of 9 | Archive leaderboard | report |
| Novel View Synthesis | X3D | SAX-NeRF | PSNR | 51.37 | #1 of 6 | Archive leaderboard | report |
| Novel View Synthesis | X3D | SAX-NeRF | SSIM | 0.9994 | #1 of 6 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
Methods
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