摘要
通过多个点状探测器在三维空间中的适当分布的排列，得到了基于倒置结构Ｘ射线锥形束投影的直接体积重建三维成像模式。与锥形束边界重建相结合，针对倒置结构构造的重建算法及其数值仿真表明，新的成像模式相对于传统的锥形束边界重建，在实际存在Ｘ射线投影噪声情形下有明显的优点。
A novel direct volume reconstruction method based on reverse geometry for cone beam X ray projections is presented. We combine the cone beam boundary reconstruction with reverse geometry by extending one or two detectors to many point shaped detectors located purposively in 3D space. The boundary reconstruction algorithm and its numerical simulation on two volume phantoms have shown that the new reverse geometry is worth considering and exploiting compared to the conventional X ray cone beam boundary reconstruction in case of X ray projection noise.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1999年第1期35-40,共6页
Acta Optica Sinica
基金
国家自然科学基金
上海市青年科学基金
关键词
直接体积重建
边界重建
无损检测
倒置结构
direct volume reconstruction, boundary reconstruction, cone beam reconstruction, X ray 3D imaging, non destructive evaluation.
