CD274 and neoplasm: Interestingly, the uptake of [18F]FDG in MC38 and 4T1 xenografts was 5.3 ± 0.4 and 6.4 ± 0.6%ID/g at 1 h, while the uptake of [64Cu]NOTA-MX001 was 5.6 ± 0.3 and 1.3 ± 0.4%ID/g at 12 h, allowing to verify the tumor’s expression of PD-L1 in contrast to nonspecific [18F]FDG uptake.