3'-Fluoro-3'-deoxythymidine (Alovudine) is a marker of DNA synthesis that is less susceptible to inflammatory changes than 18F-Fluorodeoxyglucose (FDG) and thus is a better biomarker in pancreatic cancer[1].
References:
[1]. Challapalli A, et al. 3'-Deoxy-3'-18F-fluorothymidine positron emission tomography as an early predictor of disease progression in patients with advanced and metastatic pancreatic cancer. Eur J Nucl Med Mol Imaging. 2015 May;42(6):831-40.
















