Segmentation and reconstruction of vascular structures for 3D real-time simulation
Segmentation and reconstruction of vascular structures for 3D real-time simulation
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DOI：
10.1016/j.media.2010.06.006
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发表时间：
2011-02
影响因子：
10.9
通讯作者：
Xunlei Wu;V. Luboz;K. Krissian;S. Cotin;S. Dawson
中科院分区：
文献类型：
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作者：
Xunlei Wu;V. Luboz;K. Krissian;S. Cotin;S. Dawson
我们提出了一种技术，通过两个步骤：分割和重建，获得患者特定血管结构的准确和光滑的表面。第一步是提供准确和平滑的血管中心线，以及横截面方向和横截面拟合。初始中心线是通过使用水平集方法分割的血管的同伦细化而获得的。除圆拟合法外，还提出了一种椭圆拟合和中心线位置修正的迭代方法，大大改善了截面方向和中心线的位置。第二步是基于这些数据重建表面，生成一组拓扑上保留的四边形分支管状结构补丁。它改进了Felkel的网格化方法(Felkel等人，2004年)：允许一条血管有多个父代和子代，减少欠采样伪影，并调整横截面分布。在幻影和真实数据集上的实验表明，该方法在平滑程度、三角形数目和距离误差方面都达到了很好的平衡。该技术可应用于介入放射学模拟、虚拟内窥镜以及用于模拟的光滑和精确的三维模型的重建。
We propose a technique to obtain accurate and smooth surfaces of patient specific vascular structures, using two steps: segmentation and reconstruction. The first step provides accurate and smooth centerlines of the vessels, together with cross section orientations and cross section fitting. The initial centerlines are obtained from a homotopic thinning of the vessels segmented using a level set method. In addition to circle fitting, an iterative scheme fitting ellipses to the cross sections and correcting the centerline positions is proposed, leading to a strong improvement of the cross section orientations and of the location of the centerlines. The second step consists of reconstructing the surface based on this data, by generating a set of topologically preserved quadrilateral patches of branching tubular structures. It improves Felkel’s meshing method (Felkel et al., 2004) by: allowing a vessel to have multiple parents and children, reducing undersampling artifacts, and adapting the cross section distribution. Experiments, on phantom and real datasets, show that the proposed technique reaches a good balance in terms of smoothness, number of triangles, and distance error. This technique can be applied in interventional radiology simulations, virtual endoscopy and in reconstruction of smooth and accurate three-dimensional models for use in simulation.