The blood uptake values of 177Lu-Alb-L4 (blood AUC0-192h of 307 ± 80) were in the range of 177Lu-L14 (blood AUC0-192h of 314 ± 37), indicating a 2-fold improvement in the tumor-to-blood ratios of 177Lu-Alb-L4 relative to 177Lu-L14. The gene discussed is ALB; the disease is neoplasm.