Effect of (A) number of Sep-PakⓇ Silica cartridges, (B) concentration of DMAE, (C) radioactivity of [18F]fluoride on radiochemical yield of [18F]fluorocholine. Data were presented as the mean±standard deviation. Statistical analysis is performed by Student’s t test. *P<0.05, **P<0.001.
Abbreviation: DMAE, N,N-dimethylaminoethanol.
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