FOLH1 and glioblastoma: All GBM mice of the dynamic imaging cohort (n=4) showed an increased PSMA PET signal at the site of implantation (Figure 2A); average SUVmax and SUVmean for the entire group using the Iso50 tumor VOI were 0.67 ± 0.02 g/ml and 0.37 ± 0.08 g/ml, respectively.