Table 2 Specifications of commercially available and recently introduced new clinical TOF-PET/CT systems. Not all specifications are already available
Company | |||||
|---|---|---|---|---|---|
Philips | Siemens | GE | Philips | Toshiba | |
System name | |||||
Ingenuity | Biograph | Discovery | Vereos | Celesteion | |
TF [40] | mCT [13] | 690 [14] | Digital [41] | [43] | |
Scintillator | LYSO | LSO | LYSO | LYSO | LYSO |
Photo-detector | PMT | PMT | PMT | dSiPM | PMT |
Crystal size, mm3 | 4 ×4×22 | 4 ×4×20 | 4.2 ×6.3×25 | 4 ×4×19 | 4 ×4×12 |
Total crystals | 28,336 | 32,448 | 13,824 | 23,040 | 30,720 |
Patient bore, cm | 71.7 | 78 | 70 | 70 | 88 |
Axial length, cm | 18 | 21.8 | 15.7 | 16.4 | 19.6 |
Resolution, mm | |||||
Transaxial | |||||
at 1 cm/10 cm | 4.8/5.1 | 4.4/4.95 | 4.7/5.06 | 4.1/4.5 | 5.1/5.1 |
Axial | |||||
at 1 cm/10 cm | 4.73/5.23 | 4.4/5.9 | 4.74/5.55 | 3.96/4.3 | 5.0/5.4 |
Energy resolution, % | 11.1 | 11.5 | 12.4 | 11.1 | NA |
Lower E thr, keV | 440 | 435 | 425 | 450 | NA |
Higher E thr, keV | 665 | 650 | 650 | NA | NA |
Scatter fraction, % | 36.7 | 33.2 | 37 | 30 | 42.7 |
Sensitivity, cps/kBq | 7.3 | 9.7 | 7.4 | 5.7 | NA |
Coincidence window, ns | 4.5 | 4.1 | 4.9 | 4 | NA |
Peak NEC, | |||||
kcps at kBq/mL | 124 at 20.3 | 180 at 28 | 139 at 29 | 171 at 50 | 153 at NA |
TOF bin size, ps | 25 | 312 | NA | NA | NA |
TOF resolution, ps | 502 | 527.5 | 544.3 | 316 | ∼410 |