Abstract:
18F-6-Fluoride-L-DOPA (
18F-DOPA) has an important value in the imaging diagnosis of neuroendocrine tumors. In this study, we used homemade Fluoride-module to synthesis
18F-DOPA and evaluate its clinical imaging.
18F-DOPA was synthesized by direct nucleophilic reaction with 6-boric acid-dimethoxy-L-DOPA as precursor, Cu(OTf)
2(py)
4 as catalyst, and hydrolysis by hydriodic acid. Quality control and the in vitro stability were preformed. The
18F-DOPA was confirmed PET imaging of neuroendocrine neoplasms and control. It took 60 minutes from
18F ions to
18F-DOPA, no corrected efficiency was (10.0±2.3)% (
n=6), radiochemistry purity was over 99%. It could got 7.4 GBq of
18F-DOPA once time. The trace of ascorbic acid or ethanol could prevent radiolysis of
18F-DOPA. The striatum was seen at
18F DOPA imaging. The radioactivity were mainly extracted through kidney and urine. A positive lesion in pancreatic in patient with neuroendocrine tumor.
18F-DOPA was synthesized by direct nucleophilic reaction with homemade Fluoride-module. It could got good repeatability and high quality for clinical used.