FOLH1 and neoplasm: We assessed visual indicators-such as the visual PSMA PET tumor-to-salivary gland ratio, tumor heterogeneity, and intensity scores-and quantitative metrics including total tumor volume (TTV), total tumor SUV<sub>mean</sub>, total tumor SUV<sub>max</sub>, total lesion uptake (TTV × total tumor SUV<sub>mean</sub>), total lesion quotient (TTV ÷ total tumor SUV<sub>mean</sub>), and the quantitative PSMA PET tumor-to-salivary gland score.