arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2209.08355cs.CV
收藏

可微拓扑保持距离变换用于肺气道分割

Differentiable Topology-Preserved Distance Transform for Pulmonary Airway Segmentation

Institute and Medical Robotics, Shanghai Jiao Tong University(上海交通大学医疗机器人研究院)

Minghui Zhang, Guang-Zhong Yang, Yun Gu

AI总结:

针对肺气道分割中类不平衡导致的拓扑断裂问题,提出可微拓扑保持距离变换框架,结合拓扑保持代理策略与卷积距离变换,在公开数据集上显著提升分支和长度检出率。

摘要:

详细肺气道分割是支气管内介入治疗和外周定位肺癌病灶的临床重要任务。卷积神经网络(CNNs)是医学图像分析的有前景工具,但在特征分布显著不平衡的情况下表现不佳,而气道数据正是如此,因为气管和主支气管占据大部分体素,而肺叶支气管和远端段支气管仅占小比例。本文提出一种可微拓扑保持距离变换(DTPDT)框架,以提高气道分割性能。首先提出一种拓扑保持代理(TPS)学习策略,以平衡训练过程中的类内分布。此外,设计了一种卷积距离变换(CDT),以高灵敏度识别断裂现象,并最小化预测与真实值之间距离图的差异。所提方法在公开可用的参考气道分割数据集上进行了验证。在公开的EXACT'09和BAS数据集上,分支和长度的检出率分别为82.1%/79.6%和96.5%/91.5%,证明了该方法在提高分割性能拓扑完整性的同时保持整体拓扑准确性的可靠性和有效性。

英文摘要:

Detailed pulmonary airway segmentation is a clinically important task for endobronchial intervention and treatment of peripheral located lung cancer lesions. Convolutional Neural Networks (CNNs) are promising tools for medical image analysis but have been performing poorly for cases when existing a significant imbalanced feature distribution, which is true for the airway data as the trachea and principal bronchi dominate most of the voxels whereas the lobar bronchi and distal segmental bronchi occupy a small proportion. In this paper, we propose a Differentiable Topology-Preserved Distance Transform (DTPDT) framework to improve the performance of airway segmentation. A Topology-Preserved Surrogate (TPS) learning strategy is first proposed to balance the training progress within-class distribution. Furthermore, a Convolutional Distance Transform (CDT) is designed to identify the breakage phenomenon with superior sensitivity and minimize the variation of the distance map between the predictionand ground-truth. The proposed method is validated with the publically available reference airway segmentation datasets. The detected rate of branch and length on public EXACT'09 and BAS datasets are 82.1%/79.6% and 96.5%/91.5% respectively, demonstrating the reliability and efficiency of the method in terms of improving the topology completeness of the segmentation performance while maintaining the overall topology accuracy.

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。

↑