Figure 5
Image reconstructions of a large-size breast (18.3Ā cm chest wall diameter). Incomplete projection data were reconstructed using FDK with Parker weight, FDK with offset-detector weight (denoted as FDK-M), FRIST initialized using FDK with Parker weight, and FRIST initialized using FDK-M. The incomplete data were inpainted by AFN and further reconstructed by FDK-M. Complete projection data were reconstructed using FDK to obtain the reference (last column). The two FRIST methods further exacerbate the artifacts and/or inhomogeneities despite denoising the breast images. In our proposed method, the breast skin near the chest wall is not fully reconstructed (as indicated by the yellow arrows) since this region is the most under-scanned for the emulated short-scan and offset-detector geometry. The display window is [0.15, 0.35] cmā1.
