Automatic Segmentation of Bone Graft in Maxillary Sinus via Distance Constrained Network Guided by Prior Anatomical Knowledge

作者：Jiangchang Xu, Jie Gao, Shuanglin Jiang, Chunliang Wang, Örjan Smedby, Yiqun Wu, Xiaoyi Jiang, Xiaojun Chen · 发表于：IEEE Journal of Biomedical and Health Informatics · 年份：2024 · DOI：10.1109/jbhi.2024.3505262 · 被引用次数：3 · 研究领域：Dental Radiography and Imaging、Dental Implant Techniques and Outcomes、Medical Imaging and Analysis

Maxillary Sinus Lifting is a crucial surgical procedure for addressing insufficient alveolar bone mass andsevere resorption in dental implant therapy. To accurately analyze the geometry changesof the bone graft (BG) in the maxillary sinus (MS), it is essential to perform quantitative analysis. However, automated BG segmentation remains a major challenge due to the complex local appearance, including blurred boundaries, lesion interference, implant and artifact interference, and BG exceeding the MS. Currently, there are few tools available that can efficiently and accurately segment BG from cone beam computed tomography (CBCT) image. In this paper, we propose a distance-constrained attention network guided by prior anatomical knowledge for the automatic segmentation of BG. First, a guidance strategy of preoperative prior anatomical knowledge is added to a deep neural network (DNN), which improves its ability to identify the dividing line between the MS and BG. Next, a coordinate attention gate is proposed, which utilizes the synergy of channel and position attention to highlight salient features from the skip connections. Additionally, the geodesic distance constraint is introduced into the DNN to form multi-task predictions, which reduces the deviation of the segmentation result. In the test experiment, the proposed DNN achieved a Dice similarity coefficient of 85.48 6.38%, an average surface distance error is 0.57 0.34mm, and a 95% Hausdorff distance of 2.64 2.09mm, which is...