An iterative virtual projection method to improve the reconstruction performance for ill-posed emission tomographic problems
Liu Hua-Wei, Zheng Shu, Zhou Huai-Chun†
       
Comparison among reconstruction results (15 times virtual lines, Case D). (a) Without iteration process ( σ = 0), (b) 30 iterations ( σ = 0), (c) without iteration process ( σ = 0.01), (d) 30 iterations ( σ = 0.01).