Figure 4

The residual image of the reconstructed results from Fig. 2. From left to right, the images are the residuals of results reconstructed by FBP, PWLS-TV and PWLS-TV-FR. The images are displayed in the window [−0.0015 0.0015].

The residual image of the reconstructed results from Fig. 2. From left to right, the images are the residuals of results reconstructed by FBP, PWLS-TV and PWLS-TV-FR. The images are displayed in the window [−0.0015 0.0015].