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Table 3 Specifications of commercially available TOF-PET/MR systems

From: Recent developments in time-of-flight PET

  Company  
  Philips GE
  Ingenuity TF Signa
  PET/MR [42] PET/MR
Scintillator LYSO LBS
Photo-detector PMT SiPM
Scintillator size (mm3) 4 ×4×22 4 ×5.3×25
Total detector elements 28,336 20,160
Bore/detector diameter (cm) 70.7/90.3 60/
Axial length (cm) 18 25
Resolution (in mm)   
Transaxial at 1 cm/10 cm (mm) 4.7/5.15 4.2/5.2
Axial at 1 cm/10 cm (mm) 4.6/5.0 5.8/7.1
Energy resolution (%) 11.6 11
Lower energy threshold (keV) 460 425
Scatter fraction (%) 26 43.6 at peak NECR
Sensitivity (cps/kBq) 7.0 21
Coincidence window (ns) 6 4.57
Peak NEC (kcps at kBq/mL) 88.5 at 13.7 210 at 17.5
TOF bin size (ps) 25 NA
TOF resolution (ps) 525 400
  1. NA (Not Available)