arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2212.04155cs.CV

用于安全关键视图评估的潜在图表示

Latent Graph Representations for Critical View of Safety Assessment

ICube(ICube实验室);University of Strasbourg(斯特拉斯堡大学);CNRS(法国国家科学研究中心);IHU-Strasbourg(斯特拉斯堡大学医院研究所);Institute of Image-Guided Surgery(图像引导外科研究所);Fondazione Policlinico Universitario Agostino Gemelli IRCCS(阿戈斯蒂诺·杰梅里大学综合诊所基金会IRCCS);Institute for Research against Digestive Cancer (IRCAD)(消化道癌症研究所(IRCAD))

Aditya Murali, Deepak Alapatt, Pietro Mascagni, Armine Vardazaryan, Alain Garcia, Nariaki Okamoto, Didier Mutter, Nicolas Padoy

AI总结:

针对腹腔镜胆囊切除术CVS评估依赖高成本分割标注、泛化性受限的问题,提出基于解耦潜在场景图与图神经网络的预测方法,仅用边界框标注训练即可优于基线,用分割掩码训练能保持SOTA性能。

摘要:

在腹腔镜胆囊切除术中评估安全关键视图(CVS)需要准确识别和定位关键解剖结构、推理其相互间的几何关系,并判断其暴露质量。已有研究将语义分割作为中间步骤来处理该任务,利用预测的分割掩码再预测CVS。这类方法虽有效,但依赖成本极高的真实分割标注,且在预测分割结果错误时容易失效,限制了泛化能力。\n本研究提出一种CVS预测方法:首先使用解耦的潜在场景图表示手术图像,再通过图神经网络处理该表示。我们的图显式编码语义信息——物体位置、类别信息、几何关系——以增强解剖驱动的推理能力,同时保留视觉特征以维持可微性,从而对语义错误具备鲁棒性。最后,为降低标注成本,我们提出仅使用边界框标注训练模型,并引入辅助图像重建目标来学习细粒度的物体边界。实验表明,使用边界框标注训练时,本方法优于多个基线方法;使用分割掩码训练时,模型可有效扩展,保持当前最优性能。

英文摘要:

Assessing the critical view of safety in laparoscopic cholecystectomy requires accurate identification and localization of key anatomical structures, reasoning about their geometric relationships to one another, and determining the quality of their exposure. Prior works have approached this task by including semantic segmentation as an intermediate step, using predicted segmentation masks to then predict the CVS. While these methods are effective, they rely on extremely expensive ground-truth segmentation annotations and tend to fail when the predicted segmentation is incorrect, limiting generalization. In this work, we propose a method for CVS prediction wherein we first represent a surgical image using a disentangled latent scene graph, then process this representation using a graph neural network. Our graph representations explicitly encode semantic information - object location, class information, geometric relations - to improve anatomy-driven reasoning, as well as visual features to retain differentiability and thereby provide robustness to semantic errors. Finally, to address annotation cost, we propose to train our method using only bounding box annotations, incorporating an auxiliary image reconstruction objective to learn fine-grained object boundaries. We show that our method not only outperforms several baseline methods when trained with bounding box annotations, but also scales effectively when trained with segmentation masks, maintaining state-of-the-art performance.

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。

↑