Table 1 Major specifications and performance metrics of the three total-body PET/CT systems

aFOV

64 cm (prototype)

112 cm (upgraded)

106 cm

194 cm

Sensitivity (3D)

54 kcps/MBq

83.4 kcps/MBq (MRD 85)

176.0 kcps/MBq (MRD 322)

171 kcps/MBq

Space resolution@1 cm*

4.0 mm

3.8 mm

2.9 mm

Space resolution@10 cm*

–

–

3.2 mm

scatter fraction

32%

36% (MRD 85)

37% (MRD 322)

38%

P-NECR

1550 kcps@25 kBq/cc

1613 kcps@27.49 kBq/ml (MRD 85)

2956 kcps@27.49 kBq/ml (MRD 322)

1549 kcps@16.8 kBq/cc

Time resolution

256 ps

228 ps (MRD 85)

230 ps (MRD 322)

430 ps

Energy window range (3D)

450–630 keV

435–585 keV

430–650 keV

Data collection method

3D, List-mode, Static, Dynamic

3D, List-mode, Static, Dynamic

3D, List-mode, Static, Dynamic, Gating