TABLE 4

Ratios of Response of Commercial Activity Calibrators to 18F and 68Ge in Mock Syringe Geometry at Appropriate 68Ge Dial Setting (Table 3) for Each Specific Calibrator

SourceCRC-12CRC-15CRC-35RAtomLab 100
E6FS11.05131.04861.05591.0512
E6FS21.06381.05461.05641.0523
E6FS31.05831.05101.05631.0535
Average1.0578 ± 0.00631.0514 ± 0.00301.0562 ± 0.00031.0523 ± 0.0012
  • Ratios were obtained by dividing activity readout from chamber for each 18F-FDG source by NIST-calibrated activity for that source. Uncertainty is SD on 3 determinations of response ratios.