Table 4.
Quantitative evaluation results of the head phantom studies with noisy projections.
| PSNR | NMAD | SSIM | ||
|---|---|---|---|---|
| Bone density | Image-based Method | 19.48 | 0.8836 | 0.9362 |
| EDEC Method | 22.59 | 0.5145 | 0.9342 | |
| NLM Method | 19.63 | 0.8681 | 0.9388 | |
| WLS-NLM Method | 19.52 | 0.8833 | 0.9378 | |
| MDIR Method | 22.91 | 0.5592 | 0.9508 | |
| E-SART Method | 27.99 | 0.2504 | 0.9491 | |
| Proposed Method | 29.15 | 0.1488 | 0.9655 | |
| Water density | Image-based Method | 11.99 | 0.8365 | 0.6603 |
| EDEC Method | 19.87 | 0.2639 | 0.6802 | |
| NLM Method | 11.98 | 0.8408 | 0.6652 | |
| WLS-NLM Method | 12.13 | 0.8032 | 0.6516 | |
| MDIR Method | 20.08 | 0.2704 | 0.6724 | |
| E-SART Method | 19.77 | 0.2815 | 0.6719 | |
| Proposed Method | 29.29 | 0.0485 | 0.9037 | |
| 70 KeV μ–image | Image-based Method | 13.44 | 0.5051 | 0.6512 |
| EDEC Method | 16.04 | 0.3227 | 0.6512 | |
| NLM Method | 13.42 | 0.5143 | 0.6602 | |
| WLS-NLM Method | 13.43 | 0.5051 | 0.6537 | |
| MDIR Method | 16.75 | 0.3091 | 0.6645 | |
| E-SART Method | 15.22 | 0.3818 | 0.6646 | |
| Proposed Method | 27.02 | 0.0633 | 0.8242 | |