Iterative Image Reconstruction for Sparse-View CT Using Normal-Dose Image Induced Total Variation Prior
Figure 4
Shepp-Logan phantom reconstructions by different methods.
(A) is the image reconstructed by the FBP approach with ramp filter from the full noise-free projection data, which is used as the prior image; (B) is the image reconstructed by the FBP approach with ramp filter from the 25-views projection data; (C) is the image reconstructed by the PWLS-PICCS approach () from the 25-views projection data; and (D) is the image reconstructed by The PWLS-ndiTV approach (
) from the 25-views projection data. All the images are displayed in a same window [0.0122, 0.0398].