期刊
SCIENTIFIC REPORTS
卷 12, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41598-022-17341-6
关键词
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资金
- Korea Medical Device Development Fund - Korean Government (The Ministry of Science and ICT) [1711137883, KMDF_PR_20200901_0011, 1711138289, RS-2020-KD00014]
- Korea Medical Device Development Fund - Korean Government (Ministry of Trade, Industry, and Energy) [1711137883, KMDF_PR_20200901_0011, 1711138289, RS-2020-KD00014]
- Korea Medical Device Development Fund - Korean Government (The Ministry of Health Welfare) [1711137883, KMDF_PR_20200901_0011, 1711138289, RS-2020-KD00014]
- Korea Medical Device Development Fund - Korean Government (Ministry of Food and Drug Safety) [1711137883, KMDF_PR_20200901_0011, 1711138289, RS-2020-KD00014]
- Seoul National University Research Grant in 2021
This study proposes a continuity-aware contextual network (Canal-Net) for the automatic and robust 3D segmentation of the mandibular canal (MC) in cone-beam CT (CBCT) images. The Canal-Net incorporates spatio-temporal features and a multi-task learning framework to learn the anatomical context information and structural continuity of the MC. It demonstrates higher segmentation accuracies compared to other deep learning networks, achieving high consistent accuracy in 3D segmentations of the entire MC volume.
The purpose of this study was to propose a continuity-aware contextual network (Canal-Net) for the automatic and robust 3D segmentation of the mandibular canal (MC) with high consistent accuracy throughout the entire MC volume in cone-beam CT (CBCT) images. The Canal-Net was designed based on a 3D U-Net with bidirectional convolutional long short-term memory (ConvLSTM) under a multi-task learning framework. Specifically, the Canal-Net learned the 3D anatomical context information of the MC by incorporating spatio-temporal features from ConvLSTM, and also the structural continuity of the overall MC volume under a multi-task learning framework using multi-planar projection losses complementally. The Canal-Net showed higher segmentation accuracies in 2D and 3D performance metrics (p < 0.05), and especially, a significant improvement in Dice similarity coefficient scores and mean curve distance (p < 0.05) throughout the entire MC volume compared to other popular deep learning networks. As a result, the Canal-Net achieved high consistent accuracy in 3D segmentations of the entire MC in spite of the areas of low visibility by the unclear and ambiguous cortical bone layer. Therefore, the Canal-Net demonstrated the automatic and robust 3D segmentation of the entire MC volume by improving structural continuity and boundary details of the MC in CBCT images.
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