FOLH1 and neoplasm: There was high PSMA-specific tumor uptake at all three time-points for PC3-PIP tumors, 11.4 ± 1.6% IA/g at 1 h pi, 9.4 ± 0.6% IA/g at 4 h pi, and 6.2 ± 0.5% IA/g at 24 h pi (Fig. 3a).