In addition, the growth rates of the tumor‐to‐muscle ratios of 68Ga‐NOTA‐SAC were increased from 88% at 60 min to 220% at 90 min compared to 30 min p.i. In addition, although saccharin showed a moderate blocking effect at 30 minutes due to the rapid excretion rate in the body, the CA IX traceability of saccharin have been limitedly evaluated through a blocking study. The gene discussed is CA9; the disease is neoplasm.