Table 1 Specifications of the developed total Body PET systems for animal (or human brain) use in the Explorer project
System | MiniExplorer I | MiniExplorer II |
|---|---|---|
Scintillator | LYSO | LYSO |
Readout | PMT | SiPM |
Scintillator size (mm3) | 4 × 4 × 20 | 2.76 × 2.76 ×18.1 |
Total detector elements | 32448 | NA |
Bore/detector diameter | 32.0/43.5 | NA/52 |
Axial length (cm) | 45.7 | 48.3 |
Resolution (FWHM in mm) | Â | Â |
Transaxial | 3.0 | 2.62 |
Axial | 3.0 | 2.61 |
Energy res. (%) | NA | 11.7 |
Energy window | 425-460 | 430–... |
Scatter fraction (%) | ||
NU4 | 16.5 (NU-4) | 17.8 |
NU2-2012 | NA | 41.9 |
Sensitivity | Â | Â |
% | 5% (NU-2) | 12.5% (630 keV) |
kcps/MBq | Â | 57.16 |
Coincidence window (ns) | 3.6 (46 deg acc. angle) | 2.9 |
TOF resolution (in ps) | 609 | 409 |
Peak NEC (kcps) | Â | Â |
NU-4 peak monkey | 1741 (@158 MBq)) | 1761.8 kcps@59.4kBq/cc |
NU-2 -2012 | NA | 298.7 kcps@8.4kBq/cc |