Table 5.
Quantitative evaluation results of the thorax phantom studies with noise-free projections.
| PSNR | NMAD | SSIM | ||
|---|---|---|---|---|
| Bone percentage | Image-based Method | 23.04 | 0.9729 | 0.9877 |
| EDEC Method | 28.14 | 0.6629 | 0.9797 | |
| NLM Method | 21.51 | 1.3479 | 0.9841 | |
| WLS-NLM Method | 21.32 | 1.3692 | 0.9842 | |
| MDIR Method | 31.72 | 0.1516 | 0.9967 | |
| E-SART Method | 34.70 | 0.2025 | 0.9942 | |
| Proposed Method | 40.39 | 0.0840 | 0.9984 | |
| Water density | Image-based Method | 17.05 | 0.6341 | 0.8552 |
| EDEC Method | 20.24 | 0.3839 | 0.8825 | |
| NLM Method | 17.18 | 0.6120 | 0.8639 | |
| WLS-NLM Method | 17.10 | 0.6247 | 0.8547 | |
| MDIR Method | 25.48 | 0.1962 | 0.8714 | |
| E-SART Method | 25.50 | 0.1263 | 0.9107 | |
| Proposed Method | 29.19 | 0.0597 | 0.9637 | |
| 70 KeV μ–image | Image-based Method | 25.10 | 0.3839 | 0.9192 |
| EDEC Method | 16.66 | 0.9887 | 0.8959 | |
| NLM Method | 22.03 | 0.6364 | 0.9274 | |
| WLS-NLM Method | 22.09 | 0.6293 | 0.9107 | |
| MDIR Method | 33.20 | 0.1506 | 0.9137 | |
| E-SART Method | 30.82 | 0.1122 | 0.9569 | |
| Proposed Method | 35.30 | 0.0512 | 0.9825 | |