Table 1 Comparison of the productions starting from either [11C]CO2 or [11C]CH4
Parameter | Method 1 ([11C]CO2) | Method 2 ([11C]CH4) |
|---|---|---|
Number of syntheses | 94 | 35 |
Yield in GBq (EOS) | 2.6 ± 1.3 GBq | 0.76 ± 0.27 GBq |
Yield in % (decay-corrected to [11C]CH3I) | 13.4 ± 6.2% | 16.1 ± 4.9% |
Molar activity (EOS) | 88 ± 57 GBq/μmol | 157 ± 68 GBq/μmol |
Irradiation time | 30–40 min | 25 min |
Overall synthesis time (EOB) | approx. 35 min | approx. 34 min |