These fitted receptor densities showed biologically plausible values and were comparable to those reported in human studies (e.g., 18 nM in kidneys and 46 nM in tumours) [14], with our mouse model reflecting approximately half those values, 7 nM and 19 nM, respectively, consistent with species-specific PSMA expression differences [28,29]. Here, FOLH1 is linked to neoplasm.