基于冠脉CT图像的虚拟内窥镜系统实现

发布时间：2018-04-02 20:06

本文选题：虚拟内窥镜　切入点：中心线提取　出处：《南京邮电大学》2017年硕士论文

【摘要】：冠脉疾病已经严重威胁到人类的健康,但是目前医学界还没有一种比较有效的冠脉疾病诊断方法。虚拟内窥镜技术的出现为该问题的解决提供了一种全新的思路。作为一种非侵入式的医疗检查手段,虚拟内窥镜技术越来越多的被用来代替传统的诊断方法。虚拟内窥镜是一种三维可视化工具,通过计算机对CT等医学图像的处理可以生成人体内部特定解剖结构的虚拟视图,从而模拟出传统内窥镜的视觉效果。本文针对冠脉的特点,将虚拟内窥镜技术应用到冠脉诊断中,设计并实现了一个基于冠脉CT图像的虚拟内窥镜系统。该系统主要包括冠脉中心线提取模块、冠脉内腔分割模块和冠脉三维重建模块。在冠脉中心线提取方面,采用最小代价路径方法提取的冠脉中心线作为漫游路径。在冠脉内腔分割方面,针对医疗图像存在的特点,本文采用了水平集方法来对冠脉进行分割。并在中心线的基础上,提出了一种冠脉内腔的分层显示方法。最后,利用光线投影法对提取到的冠脉内腔进行三维重建,实现了冠脉系统的虚拟漫游,取得了良好的漫游效果。
[Abstract]:Coronary artery disease has been a serious threat to human health, but there is no effective diagnostic method for coronary artery disease.The appearance of virtual endoscope provides a new way to solve this problem.As a non-invasive medical examination, virtual endoscopy is more and more used to replace the traditional diagnostic methods.Virtual endoscope is a three-dimensional visualization tool. By processing medical images such as CT, virtual view of specific anatomical structure of human body can be generated by computer, thus the visual effect of traditional endoscope can be simulated.According to the characteristics of coronary artery, virtual endoscopy is applied to coronary artery diagnosis, and a virtual endoscope system based on coronary CT image is designed and implemented.The system mainly consists of coronary centerline extraction module, coronary artery segmentation module and coronary 3D reconstruction module.In the aspect of coronary centerline extraction, the coronary centerline extracted by minimum cost path method is used as roaming path.In the aspect of intracoronary segmentation, the level set method is used to segment the coronary artery according to the characteristics of medical image.On the basis of centerline, a layered display method of intracoronary cavity is proposed.Finally, the three-dimensional reconstruction of the extracted intracoronary cavity is carried out by the ray projection method, and the virtual roaming of the coronary artery system is realized, and a good roaming effect is obtained.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R318;TP391.41

【参考文献】