Application of 68Ga NEB PET Imaging in the Diagnosis and Evaluation of Lymphatic Disorders

Inclusion Criteria: * Must be able to provide a written informed consent; Males and females, ≥18 years old； Diagnostic CT or MRI suggesting a diagnosis of lymphatic system lesion(s). In suspicion of lymphedema, lymphangioma, lymphangioleiomyomatosis, plastic bronchitis, lymphadenopathy caused by rheumatoid arthritis, etc. Exclusion Criteria: * Females planning to bear a child recently or with childbearing potential; Known severe allergy or hypersensitivity to IV radiographic contrast； Inability to lie still for the entire imaging time because of cough, pain, etc. Inability to complete the needed examinations due to severe claustrophobia, radiation phobia, etc. Concurrent severe and/or uncontrolled and/or unstable other medical disease that, in the opinion of the investigator, may significantly interfere with study compliance.