arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2311.00548cs.CV
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基于图谱的前列腺MRI持续分割

Continual atlas-based segmentation of prostate MRI

Technical University of Darmstadt(达姆施塔特工业大学);Stanford University(斯坦福大学);University of Cologne(科隆大学);University of Frankfurt(法兰克福大学);University Medical Center Mainz(美因茨大学医学中心)

Amin Ranem, Camila González, Daniel Pinto dos Santos, Andreas M. Bucher, Ahmed E. Othman, Anirban Mukhopadhyay

AI总结:

针对现有持续学习方法难以满足医学图像分割要求的问题,提出基于图谱与隐私保护原型的Atlas Replay分割方法,在七个前列腺数据集上验证其兼具鲁棒性、领域泛化性与知识保留能力。

摘要:

针对自然图像分类设计的持续学习(CL)方法往往无法达到医学图像分割的基本质量标准。基于图谱的分割是医学成像领域一种成熟的方法,它融合了感兴趣区域的领域知识,能生成语义一致的预测结果。这一点在持续学习场景中尤其具有前景,因为它让我们能够利用结构信息,在模型随时间推移的刚性与可塑性之间取得最优平衡。当与隐私保护原型结合时,该流程兼具基于排练的持续学习的优势,同时不会损害患者隐私。我们提出了Atlas Replay——一种基于图谱的分割方法,该方法利用原型通过图像配准生成高质量分割掩码,即使训练分布发生变化也能保持一致性。我们在七个公开的前列腺分割数据集上,探究了所提方法相较于前沿持续学习方法在知识可迁移性方面的表现。前列腺分割在前列腺癌诊断中至关重要,但由于解剖结构差异大、老年群体良性结构差异以及采集参数波动等问题,该任务颇具挑战性。我们的结果表明,与端到端分割方法不同,Atlas Replay不仅鲁棒性强,还能很好地泛化到未见过的领域,同时能够保留已有知识。我们的代码库可在https://github.com/MECLabTUDA/Atlas-Replay获取。

英文摘要:

Continual learning (CL) methods designed for natural image classification often fail to reach basic quality standards for medical image segmentation. Atlas-based segmentation, a well-established approach in medical imaging, incorporates domain knowledge on the region of interest, leading to semantically coherent predictions. This is especially promising for CL, as it allows us to leverage structural information and strike an optimal balance between model rigidity and plasticity over time. When combined with privacy-preserving prototypes, this process offers the advantages of rehearsal-based CL without compromising patient privacy. We propose Atlas Replay, an atlas-based segmentation approach that uses prototypes to generate high-quality segmentation masks through image registration that maintain consistency even as the training distribution changes. We explore how our proposed method performs compared to state-of-the-art CL methods in terms of knowledge transferability across seven publicly available prostate segmentation datasets. Prostate segmentation plays a vital role in diagnosing prostate cancer, however, it poses challenges due to substantial anatomical variations, benign structural differences in older age groups, and fluctuating acquisition parameters. Our results show that Atlas Replay is both robust and generalizes well to yet-unseen domains while being able to maintain knowledge, unlike end-to-end segmentation methods. Our code base is available under https://github.com/MECLabTUDA/Atlas-Replay.

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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