PET/CT Acquisition and Reconstruction Parameters for the 3 Participating Centers
| Center 1 | Center 2 | Center 3 | ||||||
| Parameter | Biograph 6 | Biograph 6 | Biograph mCT | Biograph mCT | Biograph 64 | Biograph 64 | Biograph 64 | Biograph 64 |
| PET acquisition | 2 min, 40 s | 3 min, 40 s (BMI > 25) | 2 min, 00 s | 2 min, 30 s (≤65 kg) | 3 min (65–85 kg) | 3 min, 30 s (85- 100 kg) | 4 min, 00 s (>100 kg) | |
| PET reconstruction | ||||||||
| Details | — | — | — | — | ≤65kg | 65–100 kg | >100 kg | |
| Reconstruction | OSEM3D | PSF | OSEM3D | PSF + TOF | OSEM3D | PSF | PSF | PSF |
| Iterations/subsets | 4i 8s | 3i 21s | 2i 24s | 2i 21s | 4i 8s | 3i 21s | 3i 21s | 3i 21s |
| Postprocessing filter (mm) | 5 | 0 | 4.4 | 2 | 3.5 | 6 | 5 | 4 |
| Matrix | 168 × 168 | 168 × 168 | 200 × 200 | 200 × 200 | 168 × 168 | 168 × 168 | 168 × 168 | 168 × 168 |
| Pixel spacing | 4.07 × 4.07 | 4.07 × 4.07 | 4.07 × 4.07 | 4.07 × 4.07 | 3.39 × 3.39 | 3.39 × 3.39 | 3.39 × 3.39 | 3.39 × 3.39 |
| Slice thickness (mm) | 5 | 5 | 2.027 | 2.027 | 3 | 3 | 3 | 3 |
| EQ filter (mm) | 0 | 6.9 | 0 | 6.3 | 0 | 2.4 | 3.9 | 4.9 |
BMI = body mass index.