基于血管骨架特征约束的CT图像肝脏血管分割方法研究

doi:10.3969/j.issn.0258-8021.2026.01.003

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Abstract Computed tomography (CT) is widely used in the preoperative planning stage of liver ablation surgery to assist doctors in making surgical plans. It is important to segment liver vessels from abdominal CT images. Due to the complex structure of liver blood vessels and the low contrast between blood vessels and surrounding tissues, it is difficult to accurately segment liver blood vessels from CT images. Most of the current segmentation methods only focus on the pixel distribution of blood vessels and ignore the structure information of blood vessels, so that the segmentation results often have fractures and holes. To solve the above problems, this paper proposed a liver vessel segmentation method based on vascular skeleton feature constraint and applies vascular skeleton features to the segmentation neural network. The detail process of the method included following steps: 1) A blood vessel enhancement step was added to the data preprocessing, then the blood vessel enhanced image and the original image were used as the input of the neural network, so as to introduce vascular spatial attention into the network input. 2) A skeletonization module based on Euler features was added to the post-processing procedure of the segmentation network and the output vascular skeleton feature was added to the loss function to design a joint loss function (Dice_MS_Loss) including Dice loss and morphological skeleton loss (MS_Loss), which serves as a constraint to promote the network’s topology preserve ability. In this study, 9 cases were selected from the public dataset IRCAD, and 29 cases were selected from the dataset MSD8. A total of 38 cases were used for method evaluation. The results of five-fold cross experiment showed that the proposed method was superior to other SOTA methods in terms of quantitative evaluation indicators, with the Dice coefficient of 0.749, the centerline Dice (clDice) of 0.79 and the sensitivity (Sen) of 0.754. The visual effects of the experiments showed that the proposed method was able to effectively segment liver blood vessel structures with less fractures and deficiencies.

Key words： vascular enhancement skeleton extraction vascular skeleton feature constraints

Received: 08 March 2025

PACS:

R318

Corresponding Authors: ^*E-mail:corinna@seu.edu.cn

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	Articles by authors
	Tao Siyu
	Ji Xu
	Liu Qiegen
	Chen Yang
	Tang Hui

Cite this article:

Tao Siyu,Ji Xu,Liu Qiegen, et al. Liver Vessel Segmentation in CT Images Based on Vascular Skeleton Feature Constraints[J]. Chinese Journal of Biomedical Engineering, 2026, 45(1): 25-37.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2026.01.003 OR http://cjbme.csbme.org/EN/Y2026/V45/I1/25

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