【摘要】 本文提出并实现了一个高效快速且易于推广的心脏虚拟内窥镜系统,用以观察心脏内部,辅助医生诊断。系统使用双源CT图像作为原始数据,采用基于图形处理器(GPU)的三维纹理映射体绘制方法,重建了心脏的三维结构,并能实时动态显示。在实时显示方面,提供内窥镜视角从心腔内部进行观察的同时,设计了交互式的任意数量平面裁剪后的三维立体视图作为辅助。本系统的用户可以根据自己的需要用自定义的平面对三维图像数据进行裁剪。在虚拟内窥镜漫游模式中,采用交互和自动两种方式。在自动方式下,采用以三维欧氏距离为权重的Dijk-stra算法快速生成漫游路径,并利用漫游路径推算出相应的四腔切面位置。更多还原

【Abstract】 In this paper,we present a virtual endoscopy(VE) for diagnosis of heart diseases,which is proved efficient and affordable,easy to popularize for viewing the interior of the heart.The dual source CT(DSCT) data were used as primary data in our system.The 3D structure of virtual heart was reconstructed with 3D texture mapping technology based on graphics processing unit(GPU),and could be displayed dynamically in real time.When we displayed it in real time,we could not only observe the inside of the chambers of heart but also examine from the new angle of view by the 3D data which were already clipped according to doctor’s desire.In the pattern of observation,we used both mutual interactive mode and auto mode.In the auto mode,we used Dijkstra Algorithm which treated the 3D Euler distance as weighting factor to find out the view path quickly,and,used view path to calculate the four-chamber plane.更多还原