一种分段式虚拟结肠镜导航观察方法

Virtual colonoscopy navigation based on colon division

目的针对目前虚拟结肠镜导航观察方法中常见的观察视野窄、视区易形变等问题,开发新的导航观察模式。方法本方法由结肠分段、结肠剖分和导航观察等3部分组成。首先将全结肠分割成连续的小段,再将每小段结肠进行剖分,剖成对称的两部分,最后,放置虚拟摄像机于剖面上方进行俯瞰式观察。结果本方法能实现结肠的正确分段,并具有大的观察视野,可有效观察结肠褶皱处的小病灶。结论分段导航观察方法是一种宽视野、无形变、易调整的导航观察方法,适用于虚拟大肠镜诊断导航检查系统的开发。

Objective To develop a virtual navigation mode to enlarge the field of view and decrease the deformation of the visual area.Method The method was implemented in 3 steps.The entire colon was first divided into consecutive sections,and each section was split into two halves by a plane.The virtual camera was finally assigned onto each half of the sections for navigation.Results Adequate subsections were achieved with this method,which also offer an enlarged field of view for the benefit of focal inspection.Conclusion The division navigation mode is suitable for the development of a virtual colonoscopy navigation and diagnosis system.