A Study to Evaluate the Diagnostic Efficacy of 68Ga- MY6349 PET/CT in Patients With Tumours

Inclusion Criteria: \- Age ≥ 18 years; Patients with pathologically confirmed tumour and proposed surgical resection/exploration (including primary or recurrent metastatic tumour); Expected survival \> 3 months, as judged by the doctor; Voluntarily sign the informed consent form; willing and able to follow the study protocol Exclusion Criteria: \- Persons with a known history of hypersensitivity to 68Ga-MY6349 and 68Ga-PSMA or 18F-FDG and their excipients; Those who cannot tolerate intravenous drug delivery methods (e.g., history of needle and blood sickness); Patients who have received anti-tumour therapy before the examination or neoadjuvant chemotherapy/targeted therapy for tumour reduction after the examination and up to the preoperative period; Pregnant and lactating women; Practitioners who need to be exposed to radioactive conditions for a long time; Serious diseases of heart, kidney, lung, vascular, neurological and psychiatric systems, immunodeficiency diseases and hepatitis/cirrhosis; Have participated in other interventional clinical trials within 1 month prior to screening; Patients undergoing chemotherapy, immunotherapy or molecular targeted therapy; Presence of other conditions that, in the opinion of the investigator, make participation in this study unsuitable.