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Table 1 Characteristics of all used SPECT/CT systems with LEHR collimator

From: Towards standardization of absolute SPECT/CT quantification: a multi-center and multi-vendor phantom study

System Discovery NM/CT 670 Pro Precedence 6 Symbia Intevo 6 Symbia T16
Detector crystal 3/8” NaI 3/8” NaI 3/8” NaI 3/8” NaI
PMT* 59 55 59 59
FOV* 40 × 54 cm 38.1 × 50.8 cm 38.7 × 53.3 cm 38.7 × 53.3 cm
Hole shape Hexagonal Hexagonal Hexagonal Hexagonal
Number of holes (× 1000) Not specified 86.4 148 148
Collimator hole diameter 1.50 mm 1.40 mm 1.11 mm 1.11 mm
Hole length 35 mm 32.8 mm 24.05 mm 24.05 mm
Septal thickness 0.2 mm 0.152 mm 0.16 mm 0.16 mm
Sensitivity for 99mTc @ 10 cm 72 cps/MBq 66 cps/MBq 91 cps/MBq 91 cps/MBq
Septal penetration @ 140 keV 0.3% 1.3% 1.5% 1.5%
Planar resolution 7.4 mm 7.4 mm 7.5 mm 7.5 mm
SPECT central resolution 6.4 mm 4.4 mm 4.4 mm 4.4 mm
SPECT peripheral radial resolution 5.7 mm 4.2 mm 4.0 mm 4.0 mm
SPECT peripheral tangential resolution 5.1 mm 4.3 mm 3.9 mm 3.9 mm
  1. * (C)FOV (center) field of view, PMT photomultiplier tube
  2. † Spatial resolution without scatter (LEHR collimator at 10 cm, (full width at half maximum (FWHM) in CFOV [mm], 3/8” crystal)