FOLH1 and neoplasm: The US signal in tumor rim for PSMA-NB and NB reduced by 67% and 92%, respectively, relative to the peak values (16.0 ± 8.3% vs 1.5 ± 1.8 % respectively, p = 0.4).Furthermore after perfusion, the NB signal was significantly reduced in the tumor core compared to the PSMA-NB (12.2 ± 2.3 % vs 3.2 ± 2.2% respectively, p < 0.05).