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Table 2 Statistics of the Xcal ratios for six systems over 3 years

From: Cross-calibration of the Siemens mMR: easily acquired accurate PET phantom measurements, long-term stability and reproducibility

System Mean SD Range [min–max]
PET1: Siemens HRRT 0.99 0.0269 [0.94–1.05]
PET3: Siemens Biograph mCT 1.00 0.0266 [0.95–1.04]
PET4: Siemens Biograph mCT 1.01 0.0265 [0.95–1.06]
PET5: Siemens Biograph True-Point TrueV 1.01 0.0238 [0.95–1.06]
PET6: Siemens Biograph True-Point TrueV 1.00 0.0209 [0.95–1.04]
PET7: Siemens Biograph mMR 0.84 0.0143 [0.81–0.88]