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Table 1 CT acquisition parameters used for the preliminary phantom experiment

From: Optimisation of CT protocols in PET-CT across different scanner models using different automatic exposure control methods and iterative reconstruction algorithms

  GE Discovery 710 (GE reference protocol) Siemens Biograph mCT Flow
kV 140 140
AEC setting Noise Index = 40 Quality Reference mAs varied
Collimation 64 × 0.625 mm 32 × 0.6 mm
Spiral pitch 1.375 1.35
Reconstructed slice thickness 2.5 mm 2 mm or 3 mm
Reconstructed field of view 500 mm 500 mm
Rotation time 0.5 s 0.5 s
Representative tube current 15 mA Varied with Quality Reference mAs (range 20 to 47 mA)