Evaluating the Potential Usefulness of 18F-AlF-FAPI PET/CT in Patients With Gastrointestinal Tumors and Compared With 18F-FDG PET/CT

Inclusion Criteria

• •adult patients (aged 18 years or order);
• •patients with suspected or newly diagnosed or previously treated gastrointestinal tumors (supporting evidence may include MRI, CT, tumor markers and pathology report);
• •patients who had scheduled both 18F-FDG and 18F-AlF-FAPI PET/CT scans;
• •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.