Clinical Application of 68Ga-FL-031 PET in the Diagnosis and Staging of Malignant Tumors

Inclusion Criteria: 1. The subject or their legal representative is permitted to sign the informed consent form. 2. The subject has committed themselves to adherence to the prescribed research procedures and to cooperation in the implementation of the entire study process. 3. Adult patients (aged 18 years or older), irrespective of gender 4. Patients with a clinical suspicion or confirmed diagnosis of small cell lung cancer, breast cancer, nasopharyngeal carcinoma, and other tumours (for which supporting evidence is provided in the form of serum-related tumour markers, ultrasound, CT, MRI and other image data, and histopathological examination) 5. The patient is generally in good condition 6. It is mutually agreed upon by all parties involved that the designated specimen shall be utilised for the purposes of this study. Exclusion Criteria: 1. The patient or his legal representative is unable or unwilling to sign the informed consent 2. The patient is unable to cooperate with the implementation of the whole process research 3. The patient has been diagnosed with acute systemic diseases and electrolyte disorders 4. Pregnant women or lactating women, etc 5. In the event of other circumstances being deemed by the investigator to be unsuitable for participation in the study, such patients must be excluded on the basis of their known intolerance to SSTR2 targeted substances.