3D Algebraic Iterative Reconstruction for Cone-Beam X-Ray Differential Phase-Contrast Computed Tomography
Fig 3
(a) and (b) are the images of the axial mid-plane of the Defrise phantom reconstructed by FDK and AIR algorithms respectively, which correspond to the case with a cone-beam angle of 0∘. (d) and (e) are the sagittal slices reconstructed by FDK and AIR algorithms respectively, which have a maximum cone-beam angle of 6∘. Starting from the bottom, the central layer of each disc corresponds to a cone angle of 0∘, 1.5∘, 3.0∘, 4.5∘ and 6.0∘. (c) and (f) present the profiles along the red solid lines and the blue dashed lines in (a), (b) and (d), (e). The display grey scale is set to be [0 1.1]×10−6. The relax coefficient is set to be 0.8 and the number of the overall iterations is 10.