An iterative virtual projection method to improve the reconstruction performance for ill-posed emission tomographic problems
Liu Hua-Wei, Zheng Shu, Zhou Huai-Chun†
       
Detection system with six asymmetric projections. The square area of study is divided into equilateral triangle plane meshes whose identical edge lengths equal twice the initial inherent width of the line of sight in the projections. Six asymmetric projection directions are arranged to capture projection data.