• 1. West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, 610041, P. R. China;
  • 2. West China Hospital-Sensetime Joint Laboratory, Chengdu, 610213, P. R. China;
LI Kang, Email: likang@wchscu.cn
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Objective  To propose an innovative self-supervised learning method for vascular segmentation in computed tomography angiography (CTA) images by integrating feature reconstruction with masked autoencoding. Methods  A 3D masked autoencoder-based framework was developed, where in 3D histogram of oriented gradients (HOG) was utilized for multi-scale vascular feature extraction. During pre-training, random masking was applied to local patches of CTA images, and the model was trained to jointly reconstruct original voxels and HOG features of masked regions. The pre-trained model was further fine-tuned on two annotated datasets for clinical-level vessel segmentation. Results  Evaluated on two independent datasets (30 labeled CTA images each), our method achieved superior segmentation accuracy to the supervised neural network U-Net (nnU-Net) baseline, with Dice similarity coefficients of 91.2% vs. 89.7% (aorta) and 84.8% vs. 83.2% (coronary arteries). Conclusion  The proposed self-supervised model significantly reduces manual annotation costs without compromising segmentation precision, showing substantial potential for enhancing clinical workflows in vascular disease management.

Citation: ZHOU Bowen, SUN Hui, DIAO Kaiyue, XIA Qing, LI Kang. Feature reconstruction-based self-supervised learning model for vessel segmentation. Chinese Journal of Clinical Thoracic and Cardiovascular Surgery, 2025, 32(6): 779-784. doi: 10.7507/1007-4848.202504059 Copy

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