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Table 3 NEMA data on PET scanners available on the market

From: Performance characteristics of silicon photomultiplier based 15-cm AFOV TOF PET/CT

  GE Healthcare Siemens Healthcare Philips Healthcare
Parameter Discovery
MI 3
PET/CT
(this work)
Discovery
MI 4
PET/CT
[3]
Signa
PET/MR
[14]
Discovery 690/710 PET/CT
[6]
Biograph mCT Flow PET/CT
[9]
Biograph mMR PET/MR
[16]
Vereos Digital PET/CT
[17]
Ingenuity TF 128
PET/CT
[10]
Axial FOV (cm) 15 20 25 15.7 22.1 25.8 16.4 18
Transverse FOV (cm) 70 70 60 70 70 59.4 67.6 67.6
Detector ring diameter (cm) 74.4 74.4 62.4 81 84.2 65.6 76.4 90
Crystal thickness (mm) 25 25 25 25 20 20 19 22
Spatial resolution FWHM (FBP)
 Radial, 1 cm 4.69 4.1 4.46 4.70a 4.33a 4.3a 4.11a 4.84a
 Tangential, 1 cm 4.08 4.19 4.08 4.70a 4.33a 4.3a 4.11a 4.84a
 Axial, 1 cm 4.68 4.48 5.35 4.74 4.25 4.3 3.96 4.73
 Radial, 10 cm 5.58 5.47 5.81 5.34 5.16 5.2 NA 5.25
 Tangential, 10 cm 4.64 4.49 4.44 4.79 4.72 4.8 NA 5.01
 Axial, 10 cm 5.83 6.01 6.75 5.55 5.85 6.6 NA 5.23
 Radial, 20 cm 7.53 7.53 8.42 NA 5.55 NA 5.79 NA
 Tangential, 20 cm 5.08 4.9 5.27 NA 6.48 NA 5.79 NA
 Axial, 20 cm 5.47 6.1 7.3 NA 7.8 NA 6.2 NA
Sensitivity at centre of FOV (cps/kBq) 7.258 13.7 22.9 7.4 9.6 15 5.7 7.39
Counting rate statistics
 Peak NECR (kcps) 102.3 193.4 214.8 139.1 185 184 171 124.1
 Peak NEC activity (kBq/ml) 23 21.9 17.6 29 29 23.1 50 20.3
 Peak NEC scatter fraction (%) 41.2 40.6 42.5 37 33.5 37.9 30 36.7
Maximum absolute error (%) 3.88 3.14 3.5 2.09 3.7 5.5 NA NA
Contrast recovery in spheres
 10 mm 47.4 53.7 36.5 44 28.5 32.5 62 17
 13 mm 59.3 64 50.6 56 42.3 50 NA 46
 17 mm 67.0 73.1 60 65 58.4 62.9 NA 58
 22 mm 77.0 82.7 68.6 75 71.7 70.8 88 63
 28 mm 82.5 86.8 80.7 87 70.1 65.1 86 68
 37 mm 85.1 90.7 88.6 89 78.3 72.3 89 68
Timing resolution (ps) 375.6 375.4 390 544.3 555b 2930 316 502
Energy resolution (%) 9.3 9.4 10.5 12.4 NA 14.5 11.1 11.1
  1. FOV field of view, FWHM full width at half maximum, FBP filtered backprojection, NA not applicable, NEC(R) noise equivalent count (rate)
  2. aRadial and tangential FWHM are averaged
  3. bTaken from [3]