华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (1): 77-81.

• 电子、通信与自动控制 • 上一篇    下一篇

基于模块化设计的三维医学图像体绘制方法

李彬1 田联房1 陈萍2 何元烈1 叶广春2 毛宗源1   

  1. 1.华南理工大学 自动化科学与工程学院,广东 广州 510640;2.广州医学院第一附属医院 核医学科,广东 广州 510120
  • 收稿日期:2005-06-02 出版日期:2006-01-25 发布日期:2006-01-25
  • 通信作者: 李彬(1979-),男,博士生,主要从事医学可视化、模式识别及智能系统方面的研究 E-mail:binleemmboy@yahoo.com.cn
  • 作者简介:李彬(1979-),男,博士生,主要从事医学可视化、模式识别及智能系统方面的研究

Volume Rendering of 3 D M edical Image Based on M odularization

Li Bin1  Tian Lian-fang1  Chen Ping2  He Yuan-lie1  Ye Guang-chun2  Mao Zong-yuan1   

  1. 1.College of Automation Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China;2.Nuclear Medicine Dept.,the First Affiliated Hospital of Guangzhou Medical College,Guangzhou 510120,Guangdong,China
  • Received:2005-06-02 Online:2006-01-25 Published:2006-01-25
  • Contact: 李彬(1979-),男,博士生,主要从事医学可视化、模式识别及智能系统方面的研究 E-mail:binleemmboy@yahoo.com.cn
  • About author:李彬(1979-),男,博士生,主要从事医学可视化、模式识别及智能系统方面的研究

摘要: 为了提高三维图像的视觉效果和重建效率,提出一种基于模块化设计的三维医学图像体绘制方法.该方法将图像分割模块与体绘制有机地结合起来,并基于混合型链结区域增长与聚类分析的分割方式,来解决在实际应用中旋转观察时存在的障碍物体干扰问题.同时,基于Rayeasting算法,对重构核进行改进设计:用包围盒选择与动态调整采样步长的重采样方法来提高重建效率;通过旋转光源和视角,对感兴趣的区域进行采样重建.实验证明该方法不仅效率高,而且显示效果好.

关键词: 模块化, 医学图像, 体绘制, 光线投射, 旋转显示, 分割

Abstract:

In order to improve the visual effect and reconstruction eficiency of 3 D medical images.a method of vo-lume rendering is proposed based on modularization.In this method,the segmentation module is effectively corn-bined with the volume rendering,and a segmentation method based on the growing and cluster analyses in hybrid link region is developed to eliminate the disturbance of obstacles during the rotational display of 3 D image.Moreover,the modification of reconstructed kernel is performed based on the Raycasting algorithm,by adopting a resam-pling method with round--box selection and dynamic step-length adjustment to improve the reconstruction eficiency and by rotating light source and view angle to resample and reconstruct the interested region.Experiment,al results finally reveal the high eficiency and good display perform ance of the proposed method.

Key words: modularization, medical image, volume rendering, raycasting, rotational display, segmentation