A reconstructed slice of one patient dataset: (a) FBP reconstruction from the full 1160 projection views; (b) FBP reconstruction from 145 projection views; (c) FBP+NLM filtering from 145 projection views (SW=172, PW=52, h=0.01); (d) PWLS-NLM reconstruction from 145 projection views (SW=172, PW=52, h=0.006); (e) PWLS-adaptiveNLM reconstruction from 145 projection views (SW=172, PW=52, s=1×10−3, t=4×10−6). All the images are displayed with the same window.