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Table 1 Design and performance specifications of the GE Discovery MI commercial system

From: Noise reduction using a Bayesian penalized-likelihood reconstruction algorithm on a time-of-flight PET-CT scanner

GE Discovery MI Three detector rings
Axial FOV 15 cm
Patient bore size 70 cm
Photodetector SiPM
Scintillator LBSa (LYSO)
Crystal element size 3.95 × 5.3 × 25 mm3
Coincidence timing window 4.9 ns
Sensitivity 7.5 cps/kBq
Spatial resolution (FWHM mm) Radial/tangential/axial
@1 cm 4.69/4.08/4.68
@10 cm 5.58/4.64/5.83
@20 cm 7.53/5.08/5.47
Scatter fraction 41.7%
Peak NECR 102.3 kcps @ 24.7 kBq/ml
Clinical NECR 29.6 kcps @ 2.4 kBq/ml
  1. aLutetium-based scintillator