Computed Tomography, Statistical Image Reconstruction, Optimization Algorithms, Iterative Algorithms, Ordered Subsets, Gradient Methods 2 Approximation algorithms 1 Computer graphics 1 Computer science -- Algorithms -- Approximation algorithms 1 Computer science -- Computing methodologies and applications -- Computer graphics; computational geometry 1 Computer science -- Theory of data -- Data structures 1 Convex and discrete geometry -- Discrete geometry -- Discrete geometry 1 more ... Data processing 1 Discrete geometry 1 Geometry 1 less ...