Volumetric Colon Wall Unfolding Using Harmonic Differentials.
Volumetric Colon Wall Unfolding Using Harmonic Differentials.
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DOI：
10.1016/j.cag.2011.03.008
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发表时间：
2011-06-01
期刊：
影响因子：
--
通讯作者：
Gu XD
中科院分区：
文献类型：
--
作者：
Zeng W;Marino J;Kaufman A;Gu XD
体积结肠壁展开是一种用于虚拟结肠分析和可视化的新颖方法，在虚拟结肠镜检查（VC）和计算机辅助检测（CAD）系统中具有有价值的应用。体积展开的结肠使医生能够可视化整个结肠结构，而不会因腹皱襞而发生闭塞，这对于在体积结肠壁上进行高效、准确的纹理分析至关重要。尽管传统的结肠表面压平已用于这些用途，但体积结肠展开具有以所需的精度提供所需数量的信息的优点。这项工作提出了一种基于谐波微分的高效且有效的体积结肠展开方法。结肠体积根据 CT 图像重建并表示为四面体网格。在四面体网格上计算了处处线性无关的三个调和 1-形式。通过谐波 1 形式的积分，结肠体积被周期性地映射到标准长方体。该方法自动化、简单、实用。实验结果显示了该算法在真实医学数据集上的性能。虽然这里专门应用于结肠，但该方法是通用的并且可以推广到其他体积。
Volumetric colon wall unfolding is a novel method for virtual colon analysis and visualization with valuable applications in virtual colonoscopy (VC) and computer-aided detection (CAD) systems. A volumetrically unfolded colon enables doctors to visualize the entire colon structure without occlusions due to haustral folds, and is critical for performing efficient and accurate texture analysis on the volumetric colon wall. Though conventional colon surface flattening has been employed for these uses, volumetric colon unfolding offers the advantages of providing the needed quantities of information with needed accuracy. This work presents an efficient and effective volumetric colon unfolding method based on harmonic differentials. The colon volumes are reconstructed from CT images and are represented as tetrahedral meshes. Three harmonic 1-forms, which are linearly independent everywhere, are computed on the tetrahedral mesh. Through integration of the harmonic 1-forms, the colon volume is mapped periodically to a canonical cuboid. The method presented is automatic, simple, and practical. Experimental results are reported to show the performance of the algorithm on real medical datasets. Though applied here specifically to the colon, the method is general and can be generalized for other volumes.
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作者：
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