Fig. 4

Background SUV bias-corrected RC curves derived from the phantom experiments using SUVmean (a), SUVmax (b) and SUVpeak (c) quantitative metrics. Current EARL specifications for [¹⁸F]FDG-PET/CT accreditation are presented as bold dashed lines. Systems 1–2 and 3–4 represent GE scanners Discovery 690 and Discovery 710, respectively; systems 5–6 are Siemens Biograph 40_mCT and Somatom Definition AS_mCT; system 7 is the Philips Ingenuity TF PET/CT; system 8 is the Siemens Biograph 64_mCT