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Reconstruction of airway tree based on topology and morphological operations

机译：基于拓扑和形态运算的气道树重建

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3D reconstruction of airway trees can provide intuitive and useful information for understanding human lung structure and function as well as assessing the presence of disease and its response to therapy. However, due to the partial volume effects, small airways may be undetectable on some slices of lung CT images. As a result, airway tree reconstructed by the existing methods based only on segmentation results will have broken airway branches and exhibit discontinuities. This paper proposes a complete airway tree reconstruction scheme to resolve this problem, which consists of two major steps. First, the broken segments are detected by incorporating the airway tree topology with the a priori knowledge of anatomy. Topology analysis is employed to provide information related to the a priori anatomical knowledge, so that it can be applied to lung images as guidance. Then, morphology-based and linear interpolation are applied so that unconnected airway segments will gradually merge together so that a complete airway tree can be reconstructed. The process stops when all the detected discontinuities have been processed. 3D visualization is also provided to demonstrate the effectiveness of the proposed scheme.
机译：气道树的三维重建可提供用于理解人肺的结构和功能以及评估疾病的存在及其对治疗的反应直观和有用的信息。然而，由于部分容积效应，小气道可以是在肺CT图像的一些片段不可检测的。其结果是，气管树重建的仅基于分割结果将有破气道分支和展览的不连续性的现有方法。本文提出了一种完整的气管树的重建方案来解决这个问题，这包括两个主要步骤。首先，碎段通过将气管树拓扑解剖的先验知识检测。采用拓扑分析以提供与所述先验解剖知识信息，以便它可以被应用到肺图像作为指导。然后，形态为基础的和线性内插被施加，使得未连接的气道段将逐渐合并在一起，使得一个完全的气道树可以被重构。当所有检测到的不连续性都已经被处理的过程停止。还提供3D可视化以证明所提出的方案的有效性。

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