PEG–GO was conjugated to NOTA (for 66Ga‐labeling) and TRC105 antibody (binds to CD105, an ideal marker for tumor angiogenesis).[102a] 66Ga‐NOTA‐GO‐TRC105 synthesized could quantitatively evaluate the pharmacokinetics and tumor targeting efficacy based on PET imaging. This evidence concerns the gene ENG and neoplasm.