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arXiv 2503.05678eess.IVcs.CV

迈向有效且高效的上下文感知核检测在病理全滑片图像中

Towards Effective and Efficient Context-aware Nucleus Detection in Histopathology Whole Slide Images

Zhongyi Shui, Honglin Li, Yunlong Zhang, Yuxuan Sun, Yiwen Ye, Pingyi Chen, Ruizhe Guo, Lei Cui, Chenglu Zhu, Lin Yang

AI总结:

本文提出一种有效且高效的上下文感知核检测方法,通过聚合历史滑动窗口特征提升效率,并利用周围未标注样本增强模型适应性。

摘要:

在病理全滑片图像(WSIs)中进行核检测对于广泛临床应用至关重要。WSIs的十亿像素大小需要使用滑动窗口方法进行核检测。然而,主流方法对每个滑动窗口进行独立处理,这忽略了更广泛的上下文信息,容易导致不准确的预测。为了解决这一限制,最近的研究还裁剪了一个以每个滑动窗口为中心的较大视野(LFoV)补丁来提取上下文特征。然而,此类方法显著增加了整个滑片推断延迟。在本工作中,我们提出了一种有效且高效的上下文感知核检测方法。具体而言,而不是使用LFoV补丁,我们从已访问的历史滑动窗口的现成特征中聚合上下文线索,这大大提高了推断效率。此外,与之前工作中使用的LFoV补丁相比,滑动窗口补丁具有更高的放大倍数,提供了更细粒度的组织细节,从而提高了分类准确性。为了开发所提出的上下文感知模型,我们利用了标注补丁及其周围的未标注补丁进行训练。除了利用这些周围区域的高层次组织上下文,我们设计了一种后训练策略,利用其中丰富的未标注核样本来增强模型的上下文适应性。在三个具有挑战性的基准测试上进行的广泛实验结果证明了我们方法的优越性。

英文摘要:

Nucleus detection in histopathology whole slide images (WSIs) is crucial for a broad spectrum of clinical applications. The gigapixel size of WSIs necessitates the use of sliding window methodology for nucleus detection. However, mainstream methods process each sliding window independently, which overlooks broader contextual information and easily leads to inaccurate predictions. To address this limitation, recent studies additionally crop a large Filed-of-View (LFoV) patch centered on each sliding window to extract contextual features. However, such methods substantially increase whole-slide inference latency. In this work, we propose an effective and efficient context-aware nucleus detection approach. Specifically, instead of using LFoV patches, we aggregate contextual clues from off-the-shelf features of historically visited sliding windows, which greatly enhances the inference efficiency. Moreover, compared to LFoV patches used in previous works, the sliding window patches have higher magnification and provide finer-grained tissue details, thereby enhancing the classification accuracy. To develop the proposed context-aware model, we utilize annotated patches along with their surrounding unlabeled patches for training. Beyond exploiting high-level tissue context from these surrounding regions, we design a post-training strategy that leverages abundant unlabeled nucleus samples within them to enhance the model's context adaptability. Extensive experimental results on three challenging benchmarks demonstrate the superiority of our method.

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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