【作者】 李芳；

【导师】 唐平；

【作者基本信息】 广东工业大学 ， 控制科学与工程， 2015， 硕士

【摘要】 近年来,随着医学可视化、数字图像处理、人工智能等多种技术的快速发展,使得计算机口腔种植辅助软件成为当前国内外研究的热点。本课题将三维可视化技术应用到了种植诊断中来,其研究方向主要是从CT、MRI等影像中获取二维序列图像,然后通过计算机重建三维颅颌面,以便于在术前精确的确定缺牙信息,了解颅骨内部结构,再根据交互式操作和分析,对患者做出科学合理的治疗方案,使得在临床中有效避免稍有不慎造成的严重后果。在这一背景前提下,本文主要以口腔种植体的定位问题为研究对象,以提高种植手术的成功率为研究目标。对牙颌面进行三维重建,交互式拾取种植体坐标,在实现智能化的同时交互性操作,提高定位的准确性和人性化。其中,本文的主要研究工作为以下几个方面：第一,介绍了可视化开发工具VTK的框架系统,并结合医学可视化开发流程,分析体数据的特点,调用VTK类库,完成了体数据的获取。第二,在牙颌面三维重建过程中,结合可视化工具,研究了分别基于三维面绘制Marching Cubes算法与三维体绘制的Ray Casting算法条件下,对DICOM格式下的牙颌面进行三维重建,并对内部种植区域进行了虚拟切割,清晰的呈现矢状面、冠状面、横断面的图像。第三,在牙颌面种植体定位模块中,对三维交互技术进行分析,通过三维观察实现二维信息到三维信息的变化,重点阐述了坐标拾取所用的针刺取点法的原理及其实现过程,使得在实际应用中通过鼠标的拾取操作获得种植体定位点,测量种植体长度。在智能定位的基础上,分析参数的设置并做已修改,达到定位效果的人性化与精确性。论文最终在软件开发平台上开展了虚拟种植导航系统相关功能的设计与实现,对各功能模块的思想和界面设计做了详细的阐述,使得整个系统具有可移植性、模块化等特点,便于后一步的研究与开发。更多还原

【Abstract】 In recent years, with the rapid development of medical visualization, digital image processing and artificial intelligence, the computer-assisted oral cavity implantology software has been a hot research at home and abroad. This paper put three-dimensional (3D)visualization technology to planting diagnosis bell, its main research direction is to obtain a two-dimensional image sequences from CT, MRI and other imaging, and then reconstructed the 3D craniofacial through computer, thus accurately determine the missing teeth information and understand the internal structure of the skull before surgery. And then according to interactive manipulation and analysis, make a reasonable science treatment plan for the patients, avoiding serious consequences caused by the slightest mistake.In this context, this paper mainly take the orientation of the oral implants for the research object, In order to improve the success rate of planting operation as the research target.For dental maxillofacial three-dimensional reconstruction, interactive picking implant coordinates, intelligent at the same time interactive operations, to improve the accuracy and humane of the positioning. Among them, the main research of this paper are as follows:First, the visual development tools VTK framing system was introduced, combined with the development of medical visualization process. Analyzing the characteristics of volume data, calling VTK library, the acquisition of volume data were completed.Second, maxillofacial reconstruction process, combined with visualization tools, conducts a three-dimensional reconstruction for the DICOM format dentofacial under the condition of Marching Cubes algorithm based on three-dimensional volume rendering and three-dimensional surfaces Ray-Casting algorithm respectively. Also virtual cutting for internal planting area, clear orthogonal plane, coronal, cross-sectional images presented.Third, analyze the three-dimensional interactive technology in the maxillofacial implant positioning module, realize the change from two-dimensional information to three-dimensional information, emphases on the principles of coordinates used needle puncturing for points and its implementation, so that the implant positioning point can be obtained by mouse in practical applications, measure the implant length based on the intelligent positioning, the settings of analytical parameter have been modified to a humanity and the accuracy positioning effect.Related functionality design and implementation of the implantation navigation system have been carried out on software development platform in this paper, thought and interface design of each functional module made detailed elaboration, making the whole system porbility,modularity and so on,to facilitate the later further research and development.更多还原