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Table 2 Specifications of commercially available and recently introduced new clinical TOF-PET/CT systems. Not all specifications are already available

From: Recent developments in time-of-flight PET

  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
  1. NA (Not Available)