【作者】 王鹏；

【导师】 耿国华；

【作者基本信息】 西北大学 ， 计算机软件与理论， 2004， 硕士

【摘要】 计算机可视化技术为我们提供了直观、有效、准确的医学分析手段，基于医学影像的器官三维模型重建就是其中十分重要的一个方面，它在外科手术计划、医学研究与教学、远程诊断分析等领域发挥着关键的作用。 本文针对人体器官重建这一研究课题，对基于医学影像的器官轮廓检测、分割和模型重建等技术进行了深入的研究。主要的工作包括如下方面： 1．研究了医学影像的获取和预处理技术，其中包括DICOM标准、医学影像的增强及校正等内容，并给出了对医学影像获取及优化的方法。 2．在医学影像的边缘检测方面，讨论了基于梯度、二阶导数等检测方法，并对基于活动轮廓模型的边缘提取做了一定的分析研究。 3．在器官组织的分割上，研究了基于灰度阈值和纹理信息等多种常用分割原理，提出了基于变形模板的一种新分割方法。 4．通过基于轮廓线的方法和基于等值面提取的方法，实现了对三维器官的重建。 5．基于本文中所论述的算法理论，开发了分析处理医学数据的医学影像系统(Medical Image System)。本文给出了该系统的主要功能及实验结果分析。 基于医学影像的器官三维模型重建是当前医学领域的研究热点，它不仅在理论研究方面有意义，而且对于实际的临床诊断和治疗都有着重大的意义和应用价值，它会对现有的医疗现代化带来深远的影响，有着良好的社会效益和经济效益。更多还原

【Abstract】 The development of computer visualization technology provides us an accurate, intuitionistic, and efficient way for medical analyzing. Such as the three-dimensional modeling of organ based on medical image has be one most important aspect, and it has become a key part of surgical, medical researching and teaching, telemedicine and so on.Aiming at the task of the organ modeling, this thesis focuses on the techniques of organ contour-detecting, segmentation and modeling based on medical image. The research work can be summarized in following aspects:1. The technology of obtaining and pre-processing medical images is researched, including the DICOM standards, image enhancement and geometric correction of medical images, and also present the method of medical images obtaining and optimizing.2. The edge-detection of medical image base on grads and second derivative is expatiated, especially, some work on edge extraction using improved active contour models also has been done.3. Some techniques for organ segmentation, such as grayscale threshold, texture and especially the new way of image segmentation based on deformable templates, are presented in detail.4. Two primary ways designed for three-dimensional modeling, which is based on contours triangularization or iso-surfaces extraction, are presented in this thesis.5. According to these arithmetic and theory presented in this thesis, a system for processing medical data, which named Medical Image System, is designed and implemented. The main functions and result analysis of the system are highly detailed and discussed in this thesis.The three-dimensional modeling of organ based on medical image is the hotspot of medical research. It not only has theoretic significance but also represents great importance in clinical diagnostic and treatment. And it also will cause (or has caused) a revolution in the modernization of medical treatment.更多还原