分割
计算机科学
人工智能
边界(拓扑)
模式识别(心理学)
图像分割
掷骰子
锥束ct
计算机视觉
计算机断层摄影术
数学
医学
几何学
放射科
数学分析
作者
Xiyi Wu,Huai Chen,Yalin Huang,Huayan Guo,Tiantian Qiu,Lisheng Wang
标识
DOI:10.1109/isbi45749.2020.9098542
摘要
Tooth instance segmentation provides important assistance for computer-aided orthodontic treatment. Many previous studies on this issue have limited performance on distinguishing adjacent teeth and obtaining accurate tooth boundaries. To address the challenging task, in this paper, we present a novel method achieving tooth instance segmentation and classification from cone beam CT (CBCT) images. The core of our method is a two-level hierarchical deep neural network. We first embed center-sensitive mechanism with global stage heatmap, so as to ensure accurate tooth centers and guide the localization of tooth instances. Then in the local stage, DenseASPP-UNet is proposed for fine segmentation and classification of individual tooth. Further, in order to improve the accuracy of tooth segmentation boundary and refine the boundaries of overlapped teeth, a boundary-aware dice loss and a novel label optimization are also applied in our method. Comparative experiments show that the proposed framework exhibits high segmentation performance and outperforms the state-of-the-art methods.
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