Fig. 5

TLC chromatograms of [¹⁸F]AlF-FAPI-74 with 10 mM phosphate buffered saline (pH 6.7) containing 100 mg sodium ascorbate as a formulation solution. [¹⁸F]fluoride or [¹⁸F]AlF peak is appeared near the origin (Rf = 0) and Rf of [¹⁸F]AlF-FAPI-74 is approximately 0.6–0.7