Optimization-based image reconstruction in x-ray computed tomography by sparsity exploitation of local continuity and nonlocal spatial self-similarity
Zhang Han-Ming, Wang Lin-Yuan, Li Lei, Yan Bin†, 
, Cai Ai-Long, Hu Guo-En
, Cai Ai-Long, Hu Guo-En Root mean squared errors as a function of iterations for different methods in noise-free case.
