Penalty of  SART  reconstruction algorithm for cone-beam CT

doi:10.3778/j.issn.1002-8331.2008.28.051

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (28): 152-154.DOI: 10.3778/j.issn.1002-8331.2008.28.051

• 图形、图像、模式识别 • Previous Articles Next Articles

Penalty of SART reconstruction algorithm for cone-beam CT

JI Dong-jiang^1,2,ZENG Li¹,ZOU Xiao-bing¹

1.ICT Research Center，Key Laboratory of Optoelectronic Technology and System of the Education Ministry of China，Chongqing University，Chongqing 400044，China
2.Department of Mathematics and Information Science，Tianjin University of Technology and Education，Tianjin 300222，China

Received:2008-04-08 Revised:2008-06-23 Online:2008-10-01 Published:2008-10-01
Contact: JI Dong-jiang

锥束CT的惩罚SART重建算法

冀东江^1,2,曾理¹,邹晓兵¹

1.重庆大学光电技术及系统教育部重点实验室 ICT研究中心，重庆 400044
2.天津工程师范学院数理与信息科学系，天津 300222

通讯作者: 冀东江

Abstract

Abstract: In SART（Simultaneous Algebraic Reconstruction Technique），there is no restrict to image space，so the image space’s noise will increase after the definite number of iteration.In order to solve this problem，for three dimensional cone-beam CT，a penalty SART is researched，at the same time，this means combined with ordered subsets is also researched.Computer simulation experiment results show that，in cone-beam CT image reconstruction，this means can improve the convergence speed of image reconstruction and reduce the effect coming from the noise.

Key words: cone-beam CT, Simultaneous Algebraic Reconstruction Technique（SART）, penalty SART, image reconstruction, computer simulation

摘要： 联合代数迭代方法（SART）对重建图像空间是无约束的，其迭代到一定次数后，图像空间的噪声会不断增加。为了解决这一问题，针对三维锥束CT情况，研究了一种增加惩罚项的联合代数迭代算法，同时研究了该算法与有序子集结合的方法。计算机仿真试验表明：在锥束CT图像重建中，该方法能够在抑制噪声的同时提高重建图像的收敛速度。

关键词: 锥束CT, 联合代数迭代方法, 惩罚SART, 图像重建, 计算机仿真

JI Dong-jiang^1,2,ZENG Li¹,ZOU Xiao-bing¹. Penalty of SART reconstruction algorithm for cone-beam CT[J]. Computer Engineering and Applications, 2008, 44(28): 152-154.

冀东江^1,2,曾理¹,邹晓兵¹. 锥束CT的惩罚SART重建算法[J]. 计算机工程与应用, 2008, 44(28): 152-154.

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Penalty of SART reconstruction algorithm for cone-beam CT

锥束CT的惩罚SART重建算法

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