Table 2.
PSNR and SSIM indices variation in comparison to PET100, considering the slice with all visible spheres from the NEMA IEC phantom experiments (E1 & E2)
| PET50 | PET50 + SP | PET33 | PET33 + SP | |
|---|---|---|---|---|
| PSNR (E1) | ||||
| D710 | 41.61 | 43.07 | 36.55 | 37.42 |
| IQ4 | 38.86 | 40.30 | 37.81 | 40.26 |
| DMI4 | 38.53 | 40.19 | 33.12 | 33.88 |
| PSNR (E2) | ||||
| D710 | 35.60 | 36.73 | 35.82 | 39.29 |
| IQ4 | 39.27 | 40.92 | 34.85 | 36.98 |
| DMI4 | 34.71 | 39.26 | 30.98 | 35.04 |
| SSIM (E1) | ||||
| D710 | 0.982 | 0.984 | 0.972 | 0.976 |
| IQ4 | 0.979 | 0.983 | 0.968 | 0.977 |
| DMI4 | 0.983 | 0.987 | 0.968 | 0.973 |
| SSIM (E2) | ||||
| D710 | 0.980 | 0.981 | 0.968 | 0.975 |
| IQ4 | 0.980 | 0.983 | 0.972 | 0.978 |
| DMI4 | 0.976 | 0.980 | 0.964 | 0.972 |
SubtlePET processing increase the PSNR & SSIM in every instance i.e., PET50 & PET33 images