The Exploration of Novel Radionuclide-labeled HER2-targeting Antibodies in the Diagnosis of HER2-positive Malignancies

Main objectives: * Application of novel radionuclide-labeled HER2-targeting antibodies (89Zr-LNCab002, 89Zr-LNCab072, 89Zr-LNCab190) in the early diagnosis of breast cancer, gastric cancer, urothelial carcinoma and other diseases; * To evaluate the efficacy, safety and dosimetry of 89Zr-LNCab002, 89Zr-LNCab072, 89Zr-LNCab190 in clinical PET imaging applications. Secondary Objectives: * To investigate the biodistribution of 89Zr-LNCab002, 89Zr-LNCab072 and 89Zr-LNCab190 in patients with breast cancer, gastric cancer and urothelial carcinoma, including the distribution of primary and metastatic tumors and normal tissues, through the evaluation of whole-body imaging and SUV values using PET/CT imaging. * Compared with 18F-FDG, the clinical application value and diagnostic advantages of the novel radionuclide-labeled HER2-targeting antibodies 89Zr-LNCab002, 89Zr-LNCab072 and 89Zr-LNCab190 were evaluated.