Fig. 4. Representative [¹⁸F] positron emission tomography (PET) images of living mice bearing PC3-derived tumor xenografts administered with (a) [¹⁸F]FAC-FDG-1, (b) [¹⁸F]FAC-FDG-1 with intratumoral FA injection, (c) [¹⁸F]Ctrl-FAC-FDG-1, and (d) [¹⁸F]FDG. Top images show coronal view and bottom images show transverse view. t = tumor (e) relative [¹⁸F] uptake in various tissues as imaged with [¹⁸F]FAC-FDG-1 (light grey bars) [¹⁸F]FAC-FDG-1 plus 1 mM FA (grey bars), and [¹⁸F]Ctrl-FAC-FDG-1 (dark bars) *p < 0.05.