When the tumor reached approximately 100 mm3, either PSMA-targeted or untargeted AuNPs of various sizes were intravenously injected via the tail vein, and CT scanning was conducted before and at 0.5 h, 1 h, 2 h, 4 h, 6 h, and 24 h post particle injection. The gene discussed is FOLH1; the disease is neoplasm.