[1]王蔚林,姜晓彤,罗立民,等.利用投影数据重排进行锥形束体积重建的改进算法[J].东南大学学报(自然科学版),2004,34(3):332-335.[doi:10.3969/j.issn.1001-0505.2004.03.011]
 Wang Weilin,Jiang Xiaotong,Luo Limin,et al.Improved cone-beam reconstruction algorithm with projection data rebinning[J].Journal of Southeast University (Natural Science Edition),2004,34(3):332-335.[doi:10.3969/j.issn.1001-0505.2004.03.011]
点击复制

利用投影数据重排进行锥形束体积重建的改进算法()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第3期
页码:
332-335
栏目:
生物医学工程
出版日期:
2004-05-20

文章信息/Info

Title:
Improved cone-beam reconstruction algorithm with projection data rebinning
作者:
王蔚林 姜晓彤 罗立民 舒华忠
东南大学生物科学与医学工程系, 南京 210096
Author(s):
Wang Weilin Jiang Xiaotong Luo Limin Shu Huazhong
Department of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
关键词:
锥形束重建 体积重建 反投影
Keywords:
cone-beam reconstruction volumetric reconstruction backprojection
分类号:
R814.42;TP391.41
DOI:
10.3969/j.issn.1001-0505.2004.03.011
摘要:
针对锥顶轨迹为单圆的锥形束体积重建问题,提出了一种基于平板检测器的T-FDK算法.不同于传统的FDK算法,该算法首先将锥形束投影数据重排为倾斜平行投影数据,然后再经过加权滤波和反投影重建,最后重建出待测物体的三维结构.数据仿真实验结果表明,该算法在保持与传统FDK算法有相同的计算复杂度的同时,重建图像的质量有了明显的提高,可以确保在较大的锥角范围内获得满意的重建图像.因而该算法在医学成像和无损探伤等领域具有重要的实用价值.
Abstract:
A volumetric reconstruction algorithm named FT-FDK(flat-panel based tent FDK algorithm)is presented based on the ideas of Grass’s T-FDK algorithm. The X-ray projection data were collected on a flat panel detector instead of a cylinder detector, which was quite different from Grass’s algorithm. The 2-D projects were obtained along a single circular source trajectory. Unlike traditional FDK algorithm, there are three steps in this new algorithm. Firstly, the projection data should be rebinned to oblique parallel projection data. Then, the rebinned oblique parallel projection data are pre-weighting filtered. Finally, the filtered projection data are backprojected to the final 3-D reconstructed image data. Theory and experimental results show that the algorithm has the same computational complexity as traditional FDK algorithm while the image quality can be improved in the reconstruction. Results suggest that the algorithm can be widely used in applications of medical imaging and nondestructive testing.

参考文献/References:

[1] 吕东辉.基于动态扫描和分散探测的完全结构的直接体积成像研究[D].上海:上海交通大学生命科学技术学院,1999.
[2] Feldkamp L A,Davis L C,Kress J W.Practical cone-beam algorithm [J]. J Opt Soc A,1984,1(6):612-619.
[3] Turbell H.Three-dimensional image reconstruction in circular and helical computed tomography [D].Sweden:Department of Electrical Engineering,Linköping University,1999.
[4] Grass M,Köhler Th,Proksa R.3D cone-beam CT reconstruction for circular trajectories [J]. Phys Med Biol,2000,45(2):329-347.
[5] 庄天戈.CT原理与算法 [M].上海:上海交通大学出版社,1992.46-48.
[6] Kak A C,Slaney M.Principles of computerized tomographic imaging [M].New York:IEEE Press,1987.

备注/Memo

备注/Memo:
作者简介: 王蔚林(1973—),男,博士生; 罗立民(联系人),男,博士,教授,博士生导师,luo.list@seu.edu.cn.
更新日期/Last Update: 2004-05-20