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. Author manuscript; available in PMC: 2019 Sep 30.
Published in final edited form as: Med Phys. 2017 Jun 16;44(8):4083–4097. doi: 10.1002/mp.12292

FIG. 4.

FIG. 4.

Normalized RMSE as a function of information density is shown for the simulated phantoms. The improvement in RMSE of HOTV-PAPA compared with optimally Gaussian post-filtered ML-EM for both the Sinc+ and brain phantoms. The ID¯ is increased by a factor of four for each sequential marker.