CCKBR and neoplasm: At 30 min post-injection, the tumor uptake rates of [68Ga]Ga-DOTA-CCK2R-dimer and [68Ga]Ga-DOTA-CCK-66 were 5.81 ± 1.83 %ID/g and 3.00 ± 0.63 %ID/g (Table S2), respectively, indicating substantial tumor accumulation.