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Otto: a 4.04 GBq (109 mCi) 68Ge/68Ga generator, first of its kind - extended quality control and performance evaluation in the clinical production of 68GaGa-PSMA-11
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Otto: a 4.04 GBq (109 mCi) 68Ge/68Ga generator, first of its kind - extended quality control and performance evaluation in the clinical production of 68GaGa-PSMA-11
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Journal Article
Otto: a 4.04 GBq (109 mCi) 68Ge/68Ga generator, first of its kind - extended quality control and performance evaluation in the clinical production of 68GaGa-PSMA-11
2020
Overview
Background
Here we report on the comprehensive quality control of a 4.04 GBq (109 mCi) generator supplied by itG (Munich, Germany), and used for routine production of [
68
Ga]Ga-PSMA-11 for clinical imaging. The performance of the 4.04 GBq itG
68
Ge/
68
Ga generator was studied for a year and parameters including elution yield, elution profile, radioactive and stable contaminants were collected. The production yields of a series of 175 [
68
Ga]Ga-PSMA-11 clinical batches are also reported herein.
Results
This first-of-its-kind GMP grade
68
Ge/
68
Ga generator from itG with a nominal activity of 4.04 GBq (109 mCi) showed a stable
68
Ga elution profile with elution efficiency averaging 58.3 ± 3.7%.
68
Ge contaminant in the eluent slightly increased over time but remained 100x lower than those reported for comparable 1.85 GBq (50 mCi) itG generators. Metal impurities were found in concentrations lower than 100 ng/ml (ppb) throughout the study. [
68
Ga]Ga-PSMA-11 was obtained in 89 ± 4% radiochemical yields and > 99% radiochemical and chemical purities.
Conclusion
4.04 GBq (109 mCi) itG
68
Ge/
68
Ga generator is suitable for routinely produced
68
Ga tracers used in the clinic. Up to 30% higher amount of final drug product was obtained as compared to the 1.85 GBq (50 mCi) itG generator, and as a result larger number of studies could be performed, while reducing the synthetic burden.
