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. 2017 Jul 6;12(7):e0180324. doi: 10.1371/journal.pone.0180324

Fig 10. Quantitative analysis of the simulated regularization and reconstruction results.

Fig 10

These measurements were taken in each of the phantom’s calibration vials and then averaged to yield a single value per energy threshold ((A) absolute bias, Eq 63; (B) standard deviation; (C) RMSE, Eq 62). The first five sets of bars (“Iteration 1 (Hybrid Reconstruction)”) match the experimental conditions of the results summarized in Fig 9. The last two sets of bars (“Final Reconstruction”) represent the final reconstruction results after 6 iterations of the split Bregman method (“PCD Only”: Fig 7, steps 9–13; “Hybrid”: Fig 1, steps 13–18). Borrowing from the layout in Fig 9, the bar plots are accompanied by a visual comparison of the results (right column; 37 keV threshold; XL + XS).