论文标题
基于图的小肠路径跟踪具有圆柱限制
Graph-Based Small Bowel Path Tracking with Cylindrical Constraints
论文作者
论文摘要
我们提出了一种基于圆柱约束的小肠路径跟踪的新的基于图的方法。与其他器官相比，小肠的独特特征是自身沿其路线之间的接触，这使得路径跟踪与墙壁的模糊外观一起困难。当依靠墙壁检测等低级特征时，它会导致轨道路径轻松越过墙壁。为了解决这个问题，使用小肠过程中安装的一系列气缸用于指导跟踪到更可靠的方向。它使用新的成本函数将其实现为软约束。对所提出的方法进行了针对小肠从小到末端进行10次腹部CT扫描的基础真相路径的评估。与基线方法相比，所提出的方法在跟踪路径而没有犯错的情况下显示出明显的改进。对于与小肠分割有关的两种不同的设置，观察到了6.6％和17.0％的改善。
We present a new graph-based method for small bowel path tracking based on cylindrical constraints. A distinctive characteristic of the small bowel compared to other organs is the contact between parts of itself along its course, which makes the path tracking difficult together with the indistinct appearance of the wall. It causes the tracked path to easily cross over the walls when relying on low-level features like the wall detection. To circumvent this, a series of cylinders that are fitted along the course of the small bowel are used to guide the tracking to more reliable directions. It is implemented as soft constraints using a new cost function. The proposed method is evaluated against ground-truth paths that are all connected from start to end of the small bowel for 10 abdominal CT scans. The proposed method showed clear improvements compared to the baseline method in tracking the path without making an error. Improvements of 6.6% and 17.0%, in terms of the tracked length, were observed for two different settings related to the small bowel segmentation.
