PET Imaging and Reconstruction Parameters
| 18F-FDG | 18F-fluoride Kryptofix 222 complex | |||
| Scan parameters | 100-mL samples | Body phantom | 100-mL samples | Body phantom |
| Activity concentration at scan time (range) | 2 MBq | Bg: 25–38 MBq, Sph: 1.28–1.32 MBq | 4 MBq | Bg: 58 MBq, Sph: 2.3 MBq |
| Scan duration (min) | 2 | 60 | 3 | 60 |
| Reconstruction algorithm | OSEM incorporating point spread function (TrueX; Siemens ) | OSEM | OSEM incorporating point spread function (TrueX; Siemens) | OSEM |
| Iterations | 2 | 3 | 2 | 3 |
| Subsets | 12 | 21 | 12 | 21 |
| Pixel matrix | 200 × 200 | 172 × 172 | 200 × 200 | 172 × 172 |
| Pixel size (mm2) | 4.07 × 4.07 | 4.17 × 4.17 | 4.07 × 4.07 | 4.17 × 4.17 |
| Slice thickness (mm) | 3 | 2.03 | 3 | 2.03 |
Scans were performed for both 100-mL samples and large body phantom using 18F-FDG and 18F-fluoride Kryptofix 222 complex. Ranges of activity concentration at scan time result from measurements of different fluids.
Bg = background; Sph = spheres; OSEM = ordered subset expectation maximization.