Uncertainty-aware Self-ensembling Model for Semi-supervised 3D Left Atrium Segmentation

16 Jul 2019  ·  Lequan Yu, Shujun Wang, Xiaomeng Li, Chi-Wing Fu, Pheng-Ann Heng ·

Training deep convolutional neural networks usually requires a large amount of labeled data. However, it is expensive and time-consuming to annotate data for medical image segmentation tasks. In this paper, we present a novel uncertainty-aware semi-supervised framework for left atrium segmentation from 3D MR images. Our framework can effectively leverage the unlabeled data by encouraging consistent predictions of the same input under different perturbations. Concretely, the framework consists of a student model and a teacher model, and the student model learns from the teacher model by minimizing a segmentation loss and a consistency loss with respect to the targets of the teacher model. We design a novel uncertainty-aware scheme to enable the student model to gradually learn from the meaningful and reliable targets by exploiting the uncertainty information. Experiments show that our method achieves high performance gains by incorporating the unlabeled data. Our method outperforms the state-of-the-art semi-supervised methods, demonstrating the potential of our framework for the challenging semi-supervised problems.

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Task Dataset Model Metric Name Metric Value Global Rank Result Benchmark
Left Atrium Segmentation Atrial Segmentation Challenge UA-MT 95HD 7.32 # 1
ASD 2.26 # 1
Dice Score 88.88 # 1
Jaccard 80.21 # 1


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