Moreover, the ΔT2 values in H226 and MSTO-211H tumor tissues were significantly greater in the targeted group than in the nontargeted group, and MSTO-211H tumors presented higher ΔT2 values than H226 tumors did, indicating the specificity of WL-12@Fe3O4 nanoprobes for PD-L1 detection. Here, CD274 is linked to neoplasm.