Figure 2.

Flowchart of the optimization approach used in KC-MBMD; z represents the iteration count (Z iterations in total), $\mathcal{L}$ and $\mathcal{R}$ denote the separable parabolic surrogates of the data fidelity and penalty terms at each iteration, respectively. Ordered subsets and momentum-based acceleration are omitted for clarity. The implant registration parameters are assumed to be pre-computed using e.g. 3D-2D registration. The registration could be refined during the reconstruction (Stayman et al 2012); such refinement is also omitted from the flowchart for clarity.