Papers › NAF: Neural Attenuation Fields for Sparse-View CBCT Reconstruction
NAF: Neural Attenuation Fields for Sparse-View CBCT Reconstruction
Ruyi Zha, Yanhao Zhang, Hongdong Li
This paper proposes a novel and fast self-supervised solution for sparse-view CBCT reconstruction (Cone Beam Computed Tomography) that requires no external training data. Specifically, the desired attenuation coefficients are represented as a continuous function of 3D spatial coordinates, parameterized by a fully-connected deep neural network. We synthesize projections discretely and train the network by minimizing the error between real and synthesized projections. A learning-based encoder entailing hash coding is adopted to help the network capture high-frequency details. This encoder outperforms the commonly used frequency-domain encoder in terms of having higher performance and efficiency, because it exploits the smoothness and sparsity of human organs. Experiments have been conducted on both human organ and phantom datasets. The proposed method achieves state-of-the-art accuracy and spends reasonably short computation time.
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Tasks
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 | NAF | PSNR | 34.76 | #2 of 9 | Archive leaderboard | report |
| Low-Dose X-Ray Ct Reconstruction | X3D | NAF | SSIM | 0.9535 | #2 of 9 | Archive leaderboard | report |
| Novel View Synthesis | X3D | NAF | PSNR | 38.81 | #2 of 6 | Archive leaderboard | report |
| Novel View Synthesis | X3D | NAF | SSIM | 0.9785 | #2 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.
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