arXiv:2508.03357eess.IVcs.CV2025-08中稿 · MICCAI 2025被引 1

提出GL-LCM模型,实现快速高分辨率胸部X光骨结构抑制。

GL-LCM: Global-Local Latent Consistency Models for Fast High-Resolution Bone Suppression in Chest X-Ray Images

  • 分全局与局部路径建模,融合双路径采样提升细节保留。
  • 在SZCH-X-Rays和JSRT数据集上骨抑制效果优于现有方法。
  • 无需额外训练即可消除局部采样导致的边界伪影和模糊问题。

胸部X光(CXR)影像在肺部诊断中面临重大挑战,因骨骼结构会遮挡关键诊断信息。近年来,基于扩散模型的深度学习方法在减少骨骼可见度方面展现出巨大潜力,从而提升图像清晰度与诊断准确性。然而,现有方法难以在彻底抑制骨骼的同时保持局部纹理细节,且计算开销大、处理时间长,限制了其在临床中的应用。为此,本文提出全局-局部潜空间一致性模型(GL-LCM),结合肺部分割、双路径采样与全局-局部融合机制,实现快速高分辨率的骨结构抑制。为解决局部路径采样带来的边界伪影与细节模糊问题,进一步提出无需额外训练的局部增强引导策略。在自建数据集SZCH-X-Rays及公开数据集JSRT上的综合实验表明,所提方法在骨抑制效果与计算效率方面均显著优于多个先进方法。代码已开源:https://github.com/diaoquesang/GL-LCM。

原文摘要 · Abstract (English)

Chest X-Ray (CXR) imaging for pulmonary diagnosis raises significant challenges, primarily because bone structures can obscure critical details necessary for accurate diagnosis. Recent advances in deep learning, particularly with diffusion models, offer significant promise for effectively minimizing the visibility of bone structures in CXR images, thereby improving clarity and diagnostic accuracy. Nevertheless, existing diffusion-based methods for bone suppression in CXR imaging struggle to balance the complete suppression of bones with preserving local texture details. Additionally, their high computational demand and extended processing time hinder their practical use in clinical settings. To address these limitations, we introduce a Global-Local Latent Consistency Model (GL-LCM) architecture. This model combines lung segmentation, dual-path sampling, and global-local fusion, enabling fast high-resolution bone suppression in CXR images. To tackle potential boundary artifacts and detail blurring in local-path sampling, we further propose Local-Enhanced Guidance, which addresses these issues without additional training. Comprehensive experiments on a self-collected dataset SZCH-X-Rays, and the public dataset JSRT, reveal that our GL-LCM delivers superior bone suppression and remarkable computational efficiency, significantly outperforming several competitive methods. Our code is available at https://github.com/diaoquesang/GL-LCM.

医学图像扩散模型骨抑制快速生成

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