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SUV accuracy of the PET scanners relative to the dose calibrator measurements plotted by system number. 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
