Table 1 Compilation of representative scanner parameters

Crystal size

4 × 4 × 20 mm³

4 × 5.3 × 25 mm³

Crystal material

LSO

LYSO

Light sensing device

Avalanche photodiode

Si-photomultiplier

Ring diameter

65.6 cm

66 cm

Field of view

59.4 cm × 25.6 cm

60 cm × 25 cm

PSF/TOF capable

Yes/no

Yes/yes

Sensitivity

15 cps/kBq

21 cps/kBq

Peak NECR

183.5 kcps @ 23.1 kBq/mL

210 kcps @ 23.1 kBq/mL

Spatial resolution at 1 cm

4.3/4.3 mm

4.3/5.34 mm

Volumetric spatial resolution at 10 cm

165 mm³

173 mm³