Development of an economical method to synthesize O ‐(2‐[18F]fluoroethyl)‐L‐tyrosine (18FFET)

In this study, we are reporting the experience of synthesis [18F]FET by varying the concentration of TET precursor in different chemistry modules. TET precursor (2 –10 mg) was used for the synthesis of [18F]FET in an automated (MX Tracerlab) module (n = 6) and semiautomated (FX2N Tracerlab) module (n = 19). The quality control was performed for all the preparations. For human imaging, 220 ± 50 MBq of [18F]FET was briefly injected into the patient to acquire PET-MR images. The radiochemical purity was greater than 95% for the final product in both modules. The decay corrected average yield was 10.7  ± 4.7% (10 mg,n = 3) and 8.2 ± 2.6% (2 mg,n = 3) with automated chemistry module and 36.7 ± 7.3% (8–10 mg,n = 12), 26.4 ± 3.1% (5–7 mg,n = 4), and 35.1 ± 3.8% (2–4 mg,n = 3) with semiautomated chemistry modules. The PET imaging showed uptake at the lesion site (SUVmax = 7.5 ± 2.6) and concordance with the MR image. The [18F]FET was produced with a higher radiochemical yield with 2.0  mg of the precursor with substantial yield and is suitable for brain tumor imaging.
Source: Journal of Labelled Compounds and Radiopharmaceuticals - Category: Biochemistry Authors: Tags: RESEARCH ARTICLE Source Type: research