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. 2015 May 4;42(5):2699–2708. doi: 10.1118/1.4914378

FIG. 5.

FIG. 5.

Convergence and accuracy in truncated data. (a) SQS and (b) Nes reconstructions of truncated projections provided reconstructions with RMSD < 4 HU but were subject to divergence at a large number of iterations. (c) The converged solution μ∗ shows a reasonably accurate reconstruction inside the C-arm FOV. A RMSD = 4.0 HU was achieved by (d) 197 iterations of SQS-33, (e) 21 iterations of Nes-11, and (f) 32 iterations of Nes-11 with the simpler SP projectors. In (d)-(f), the reconstructed result is shown in the left half (display window [−400 400] HU), while the difference image with μ* is shown in the right half (display window [−40 40] HU).