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首页> 外文会议>Conference on physiology and function from multidimensional images >Colon unraveling based on electrical field: recent progress and further work
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Colon unraveling based on electrical field: recent progress and further work

机译：基于电气领域的冒号解开：最近的进展和进一步的工作

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CT colonography (CTC) is a new technology, which permits endoscopic-like evaluation of the mucosal surface. Recently, an electrical field based approach was developed to unravel the colon in spiral CT image volumes, that is to digitally straighten then flatten the colon using curved cross-sections. In this paper, we report (1) an exact and computation- intensive algorithm for straightening the colon using curved cross-sections, and (2) an approximate but computationally efficient straightening algorithm. In the direct straightening algorithm, each curved cross-section of the colon is defined by electrical force lines due to charges distributed along the colon path, and constructed by directly tracing the force lines. In the fast straightening algorithm, only representative force lines are traced that originate equiangularly from the current colon path position, while other force lines are interpolated from the traced force lines. The experiments are performed with both phantom and patient data. It is demonstrated that straightening the colon with curved cross-sections facilitates visualization and analysis, has potential for use in CTC; and the speed of the interpolation based straightening algorithm is practically acceptable, which is about 40 times faster than that of the direct algorithm.
机译：CT结肠摄影（CTC）是一种新技术，其允许内窥镜样镜面的粘膜表面评价。最近，开发了一种基于电场的方法来解开螺旋CT图像体积的结肠，即用弯曲的横截面向数量伸直然后压平结肠。在本文中，我们报告（1）精确和计算密集型算法，用于使用弯曲截面矫正结肠，以及（2）近似但计算有效的矫直算法。在直接矫直算法中，由于沿冒号路径分布的电荷而通过直接追踪力线构造，结肠的每个弯曲横截面由电力线限定。在快速矫直算法中，仅从电流结肠路径位置追踪的代表力线仅突出，而其他力线被从追踪力线内插。使用幻像和患者数据进行实验。证明，用弯曲的横截面矫正结肠促进可视化和分析，具有在CTC中使用的可能性;并且基于插值的速度的速度实际上是可接受的，这比直接算法的速度快约40倍。

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