ERBB2 and breast carcinoma: [17] connected N-[2-(4-Fluorobenzamido)ethyl]maleimide (FEBM) and thioserine (Cys) to ZHER2:342, and compared the imaging performance of 18F(fluorine-18)-FBEM-Cys-ZHER2:342 and 18F‐fluoro-2-deoxyglucose(FDG) in a nude mouse model of lung metastasis in HER2-positive breast cancer.