Accelerating an Ordered-Subset Low-Dose X-Ray Cone Beam Computed Tomography Image Reconstruction with a Power Factor and Total Variation Minimization
Fig 5
Simulation data: RRMSE values versus iteration numbers for the OSTR and AOSTR-TV algorithms with 15, 20 and 30 subsets.
For AOSTR-TV, we used h = 2.9 for all subsets and α = 0.0015, 0.002 and 0.003 for 15, 20 and 30 subsets, respectively. A zoomed-out view of early iterations of this figure is also displayed.