Table 2.
PET/CT scanners: reconstruction parameters.
| Discovery ST S1 |
Discovery ST S2 |
Discovery STE S3 |
Discovery 600 S4 |
Discovery 600 S5 |
Discovery 690 S6 |
Biograph 16 Hi-REZ S7 |
Biograph 6 true V S8 |
Gemini XL S9 |
Gemini TF S10 |
Gemini TF S11 |
|
|---|---|---|---|---|---|---|---|---|---|---|---|
| Reconstruction protocol | FORE-OSEM | FORE-OSEM | 3D-OSEM | 3D-OSEM | 3D-OSEM | 3D-OSEM | FORE-OSEM | FORE-OSEM | LOR-RAMLA | TF-MLEM | TF-MLEM |
| Number of iterations | 14, 42 | 16, 40 | 14, 42 | 16, 32 | 16, 48 | 54, 108 | 16, 24 | 16, 42 | 66 | 60, 99 | 60, 99 |
| Transaxial smoothing FWHM (mm) |
6, 9, 13 | 5.5, 8.2, 11 | 6, 8, 11 | 6, 8, 11 | 5.5, 8.2, 11 | 4, 6, 8 | 4, 6, 8 | 4, 6, 8 | — | — | — |
| Axial smoothing (kernel) |
— | — | 1 : 4 : 1 | 1 : 4 : 1 | 1 : 4 : 1 | 1 : 6 : 1 1 : 4.1 1 : 2 : 1 |
— | — | — | — | — |
| Kernel width (cm) | — | — | — | — | — | — | — | — | — | 14.1 | 14.1, 18.7∗ |
| Relaxation (λ) | — | — | — | — | — | — | — | — | 0.5, 0.7, 1 | 0.5, 0.7, 1 | 0.5, 0.7, 1 |
| Voxel dimensions L × W × H (mm) |
2.7 × 2.7 × 3.3 | 2.7 × 2.7 × 3.3 | 2.7 × 2.7 × 3.3 | 2.7 × 2.7 × 3.3 | 2.7 × 2.7 × 3.3 | 2.7 × 2.7 × 3.3 | 2.6 × 2.6 × 2 5.3 × 5.3 × 2 |
4.1 × 4.1 × 5 | 4 × 4 × 3 | 4 × 4 × 3 | 4 × 4 × 3 |
| Number of reconstructions | 6 | 6 | 6 | 6 | 6 | 18 | 12 | 6 | 3 | 6 | 9 |
| Number of data points | 1641 | 1651 | 1676 | 1785 | 1727 | 5368 | 3456 | 1676 | 814 | 1993 | 2466 |
∗Only available with 99 iterations.