Abstract
3D Convolutional Neural Networks (CNNs) have been widely adopted for airway segmentation. The performance of 3D CNNs is greatly influenced by the dataset while the public airway datasets are mainly clean CT scans with coarse annotation, thus difficult to be generalized to noisy CT scans (e.g. COVID-19 CT scans). In this work, we proposed a new dual-stream network to address the variability between the clean domain and noisy domain, which utilizes the clean CT scans and a small amount of labeled noisy CT scans for airway segmentation. We designed two different encoders to extract the transferable clean features and the unique noisy features separately, followed by two independent decoders. Further on, the transferable features are refined by the channel-wise feature recalibration and Signed Distance Map (SDM) regression. The feature recalibration module emphasizes critical features and the SDM pays more attention to the bronchi, which is beneficial to extracting the transferable topological features robust to the coarse labels. Extensive experimental results demonstrated the obvious improvement brought by our proposed method. Compared to other state-of-the-art transfer learning methods, our method accurately segmented more bronchi in the noisy CT scans.
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Acknowledgements
This work was partly supported by National Natural Science Foundation of China (No. 62003208), National Key R&D Program of China (No. 2019YFB1311503), Shanghai Sailing Program (No. 20YF1420800), Shanghai Municipal of Science and Technology Project (Grant No. 20JC1419500), and Science and Technology Commission of Shanghai Municipality under Grant 20DZ2220400.
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Zhang, M. et al. (2021). FDA: Feature Decomposition and Aggregation for Robust Airway Segmentation. In: Albarqouni, S., et al. Domain Adaptation and Representation Transfer, and Affordable Healthcare and AI for Resource Diverse Global Health. DART FAIR 2021 2021. Lecture Notes in Computer Science(), vol 12968. Springer, Cham. https://doi.org/10.1007/978-3-030-87722-4_3
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