东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (7): 658-661.DOI: -

• 论著 • 上一篇    下一篇

基于体素的医学图像三维表面模型重建

邹豪;陈丽华;刘积仁   

  1. 东北大学软件中心;沈阳电力高等专科学校;东北大学软件中心 辽宁沈阳 110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2003-07-15 发布日期:2013-06-24
  • 通讯作者: Zou, H.
  • 作者简介:-
  • 基金资助:
    国家"十五"科技攻关项目(2001BA706B 3)·

Voxel-based surface shading of three-dimensional medical objects

Zou, Hao (1); Chen, Li-Hua (2); Liu, Ji-Ren (1)   

  1. (1) Software Ctr., Northeastern Univ., Shenyang 110004, China; (2) Shenyang Elec. Power Inst., Shenyang 110036, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2003-07-15 Published:2013-06-24
  • Contact: Zou, H.
  • About author:-
  • Supported by:
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摘要: 三维表面模型重建是将CT和MRI等医疗影像设备获得的二维图像重建成三维立体表面显示图像的过程·重点研究了其重建算法的具体实现:在建模上采用了基于体素的三维物体体积重建;在显示上提出了基于Ray Casting的三维物体二维直接显示技术·所以,和传统采用三角面拟合的方法相比,具有图像重建过程无需生成中间数据,无需进行3D物体的边界检测等优点,同时该算法并行性好,易于采用硬件方法实现加速·

关键词: 光线投射, 三维表面模型重建, CT图像, 体素, 阈值

Abstract: In many medical imaging modalities, such as CT, MRI or PET, a 3D anatomy is usually represented by a set of planar images. For its 3D visualization, a voxel model with a ray casting algorithm was introduced. Unlike the triangle method, this algorithm does not require a detection of the boundary of the 3D object beforehand, but derives the surface image directly from the object. The algorithm includes the capability of performing ray castings for different screen pixels concurrently. The concurrent capability facilitates hardware implementation to speed up the surface rendering. The function was given to rotate and to zoom the 3D object in object coordinates and show the result in screen coordinates. Some examples of the depth shading, Gouraud shading, the combination of the depth shading and Gouraud shading, 2D image map to 3D image were shown by using simple threshold segmentation.

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