. 2017 Jun 16;44(8):4083–4097. doi: 10.1002/mp.12292

Table 2.

Percent improvement in RMSE of PAPA with an HOTV penalty using near optimal weights compared with optimal Gaussian postfiltered (GPF) fully converged ML‐EM is shown for a series of information densities for cold rod region of ACR Phantom

Cold Rod Region (300 mm FOV)

5.8

12.4

20.4

57.6

R M S E_{G P F}^{*}

0.340

0.279

0.250

0.215

R M S E_{H O T V}^{*}

0.236

0.223

0.213

0.199

%Improvement

44.1%

25.2%

17.5%

8.4%

Cold Rod Region (700 mm FOV)

30.2

64.3

106.0

299.2

R M S E_{G P F}^{*}

0.326

0.257

0.230

0.190

R M S E_{H O T V}^{*}

0.239

0.217

0.204

0.184

%Improvement

36.4%

18.7%

12.6%

3.5%