To evaluate the potential usefulness of 68Ga-BNU-PSMA positron emission tomography/computed tomography (PET/CT) for the diagnosis of primary and metastatic lesions in various types of cancer.

Subjects with various types of cancer underwent 68Ga-BNU-PSMA PET/CT either for an initial assessment or for recurrence detection. Tumor uptake was quantified by the maximum standard uptake value (SUVmax). The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy of 68Ga-BNU-PSMA PET/CT were calculated.

Inclusion Criteria:

• (i) adult population (aged 18 years or order); (ii) patients with suspected or new diagnosed or previously treated malignant tumors (supporting evidence may include MRI, CT, tumor markers and pathology report); (iii) patients who had scheduled 68Ga-BNU-PSMA PET/CT scan; (iv) patients who were able to provide informed consent (signed by participant, parent or legal representative) and assent according to the guidelines of the Clinical Research Ethics Committee; (v) healthy volunteers(aged 18 years or order).

Exclusion Criteria:

• (i) patients with pregnancy; (ii) the inability or unwillingness of the research participant, parent or legal representative to provide written informed consent.