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