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arXiv 2504.10105cs.CV

用于多模态医学图像超分辨率的全局与局部Mamba网络

Global and Local Mamba Network for Multi-Modality Medical Image Super-Resolution

School of Computer Science and Engineering, Central South University(中南大学计算机科学与工程学院);Hunan Engineering Research Center of Machine Vision and Intelligent Medicine, Central South University(中南大学机器视觉与智能医学湖南省工程研究中心);University of Rouen-Normandy(鲁昂-诺曼底大学);Henri Becquerel Cancer Center(亨利·贝克勒尔癌症中心)

Zexin Ji, Beiji Zou, Xiaoyan Kui, Sebastien Thureau, Su Ruan

AI总结:

针对多模态医学图像超分辨率中现有方法局部感受野固定或全局计算负担重的问题,提出GLMamba双分支网络,结合全局与局部Mamba分支、可变形块、调制器及对比边缘损失,高效提升超分辨率性能。

摘要:

卷积神经网络和Transformer在多模态医学图像超分辨率领域取得了显著进展。然而,这些方法要么在局部学习中具有固定的感受野,要么在全局学习中存在巨大的计算负担,限制了超分辨率性能。为解决这一问题,引入状态空间模型(尤其是Mamba),以线性计算复杂度高效建模图像中的长程依赖关系。基于Mamba以及低分辨率图像依赖全局信息补偿缺失细节、而高分辨率参考图像需提供更多局部细节以实现准确超分辨率的事实,我们提出一种全局与局部Mamba网络(GLMamba)用于多模态医学图像超分辨率。具体而言,GLMamba是一个双分支网络,配备全局Mamba分支和局部Mamba分支:全局Mamba分支捕捉低分辨率输入中的长程关系,局部Mamba分支更关注高分辨率参考图像中的短程细节。我们还使用可变形块自适应提取两个分支的特征以增强表示能力,并设计调制器进一步增强全局和局部Mamba块中的可变形特征。为充分整合参考图像以实现低分辨率图像超分辨率,我们进一步开发多模态特征融合块,通过考虑模态间的相似性、差异性和互补性来自适应融合特征。此外,我们提出对比边缘损失(CELoss),以充分增强医学图像中的边缘纹理和对比度。

英文摘要:

Convolutional neural networks and Transformer have made significant progresses in multi-modality medical image super-resolution. However, these methods either have a fixed receptive field for local learning or significant computational burdens for global learning, limiting the super-resolution performance. To solve this problem, State Space Models, notably Mamba, is introduced to efficiently model long-range dependencies in images with linear computational complexity. Relying on the Mamba and the fact that low-resolution images rely on global information to compensate for missing details, while high-resolution reference images need to provide more local details for accurate super-resolution, we propose a global and local Mamba network (GLMamba) for multi-modality medical image super-resolution. To be specific, our GLMamba is a two-branch network equipped with a global Mamba branch and a local Mamba branch. The global Mamba branch captures long-range relationships in low-resolution inputs, and the local Mamba branch focuses more on short-range details in high-resolution reference images. We also use the deform block to adaptively extract features of both branches to enhance the representation ability. A modulator is designed to further enhance deformable features in both global and local Mamba blocks. To fully integrate the reference image for low-resolution image super-resolution, we further develop a multi-modality feature fusion block to adaptively fuse features by considering similarities, differences, and complementary aspects between modalities. In addition, a contrastive edge loss (CELoss) is developed for sufficient enhancement of edge textures and contrast in medical images.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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