Learned Shrinkage Approach for Low-Dose Reconstruction in Computed Tomography

Figure 15

Columns, left to right: reconstruction by FBP, PWLS, and stage-II of our method. Rows, upper to lower: increasing signal energy corresponding to exposure levels of 𝜆₀=[3⋅10⁴,9.5⋅10⁴,3⋅10⁵,9.5⋅10⁵,3⋅10⁶].