Compressing-sensing cone-beam CT short-scan reconstruction based on projection-contraction

	Compressing-sensing cone-beam CT short-scan reconstruction based on projection-contraction
	Yang H.-C.; Gao X.; Zhang T.
	2014
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	ISBN/1004924X
卷号	22 期号:3 页码:770-778
摘要	To solve the problem of image reconstruction of incomplete projection data from a short-scan cone-beam CT, a novel cone-beam CT short-scan reconstruction algorithm was proposed based on projection-contraction method. Aiming at the non-monotonic convergence of the Gradient-Projection Barzilari-Borwein (GPBB) algorithm, the predictor-corrector feature of projection-contraction method was analyzed and incorporated into compressed sensing image reconstruction algorithm. The objective function descent direction and the projection onto convex sets descent direction were combined to correct the results of GPBB algorithm to improve the non-monotonic convergence of GPBB algorithm. Then, the experiments were conducted on simulated projection data and phantom scanning data. The simulated results for 25 sampling angles show that the signal-to-noise ratios of images reconstructed by PCBB algorithm are 9.4870, 9.8027, 3.6159 db higher than those of images reconstructed by Adaptive Steepest Descent-Projection onto Convex Sets algorithm, projection contraction algorithm and GPBB algorithm, respectively. The simulation results indicate that when a small amount of projections are acquired, the new algorithm has effectively suppressed strip artifacts and the reconstructed images show clear edges. The algorithm can greatly improved the qualify of images reconstructed from few projection data.
收录类别	EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/43801
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Yang H.-C.,Gao X.,Zhang T.. Compressing-sensing cone-beam CT short-scan reconstruction based on projection-contraction[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2014,22(3):770-778.
APA	Yang H.-C.,Gao X.,&Zhang T..(2014).Compressing-sensing cone-beam CT short-scan reconstruction based on projection-contraction.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,22(3),770-778.
MLA	Yang H.-C.,et al."Compressing-sensing cone-beam CT short-scan reconstruction based on projection-contraction".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 22.3(2014):770-778.

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