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arXiv 提交日期: 2026-06-25
📄 Abstract - Enabling self-supervised learned primal dual with Noise2Inverse

X-ray computed tomography reconstruction is an ill-posed inverse problem, particularly in low-dose and sparse-angle settings where measurements are noisy and incomplete. While learned reconstruction methods such as the Learned Primal-Dual algorithm achieve strong performance, they typically rely on supervised training with access to ground-truth data, which is often unavailable in practice. In this work, we propose a self-supervised reconstruction method by extending the Noise2Inverse framework to the Learned Primal-Dual algorithm. The resulting approach, called Noise2Inverse Learned Primal-Dual (N2I-LPD), enables training of a learned iterative reconstruction operator without ground-truth images by exploiting the statistical independence of noise in distinct measurements with respect to angular rotation of the CT-scan. We compare the proposed method with classical reconstruction methods, as well as neural network-based approaches such as a U-Net trained within the same N2I framework. The results demonstrate that N2I-LPD achieves improved reconstruction quality, highlighting the potential of combining learned reconstruction operators with self-supervised training strategies for practical CT imaging scenarios where ground-truth data is unavailable.

顶级标签: medical machine learning
详细标签: self-supervised learning ct reconstruction learned primal-dual noise2inverse inverse problem 或 搜索:

基于Noise2Inverse的自监督学习型原始-对偶算法在CT重建中的应用 / Enabling self-supervised learned primal dual with Noise2Inverse


1️⃣ 一句话总结

本文提出一种名为N2I-LPD的自监督CT图像重建方法,通过将Noise2Inverse框架与学习型原始-对偶算法结合,无需真实参考图像即可训练出高质量的重建模型,在低剂量和稀疏角度扫描场景下显著优于传统方法和同框架下的U-Net模型。

源自 arXiv: 2606.26991