| RMSE | |||
FBP | SIRT | |||
Phantom thickness | reference – reference × 1/2 | reference – reference × 1/4 | reference – reference × 1/2 | reference – reference × 1/4 |
30mm | 0.019 | 0.026 | 0.039 | 0.064 |
40mm | 0.073 | 0.174 | 0.037 | 0.041 |
50mm | 0.111 | 0.159 | 0.037 | 0.081 |
60mm | 0.067 | 0.138 | 0.095 | 0.086 |