TABLE 4.
Evaluation results of the simulated scanners in GATE based on NEMA guidelines
| Parameters | Distancea | EXPLORER | Biograph Vision | Prism-PET 1 mmb | Prism-PET 1.5 mmb | ||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| Spatial resolution (mm) | FWHM | FWTM | FWHM | FWTM | FWHM | FWTM | FWHM | FWTM | |
| Radial | 1 | 2.92 | 5.33 | 3.30 | 6.04 | 1.23 | 2.24 | 1.22 | 2.22 |
| 5 | 3.10 | 5.66 | 3.34 | 6.11 | 1.25 | 2.28 | 1.20 | 2.18 | |
| 10 | 4.49 | 8.20 | 3.76 | 6.86 | 1.54 | 2.80 | 1.26 | 2.29 | |
| Tangential | 1 | 2.83 | 5.17 | 3.34 | 6.10 | 1.21 | 2.20 | 1.33 | 2.42 |
| 5 | 4.23 | 7.72 | 3.28 | 5.98 | 1.31 | 2.38 | 1.43 | 2.60 | |
| 10 | 4.13 | 7.54 | 3.50 | 6.39 | 1.29 | 2.35 | 1.33 | 2.42 | |
| Axial | 1 | 4.26 | 7.78 | 4.43 | 8.09 | 1.16 | 2.11 | 1.26 | 2.34 |
| 5 | 4.30 | 7.85 | 4.47 | 8.16 | 1.19 | 2.17 | 1.31 | 2.30 | |
| 10 | 5.27 | 9.62 | 4.59 | 8.38 | 1.17 | 2.13 | 1.29 | 2.35 | |
| Sensitivity (kcps/MBq) | 197.9 | 16.3 | 50.4 | 52.1 | |||||
| Peak NECR (kcps at kBq/mL) | 1367.4 at 16.8 | 290.0 at 25.2 | 923.6 at 25.2 | 957.8 at 25.2 | |||||
Abbreviations: DOI, depth-of-interaction; FOV, field of view; FWHM, full width at half maximum; FWTM, full width at tenth maximum; GATE, Geant4 application for tomographic emission; NECR, noise equivalent count rate; NEMA, National Electrical Manufacturers Association.
a
Distance (in cm) from the center of transaxial FOV.
b
ICS + DOI corrections were applied to the Prism-PET scanners.