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18F-Alfatide II PET (A, D, E) and 18F-FDG PET (B, G, H) of a 68-y-old female patient (no. 1) with lung cancer. Besides the primary tumor in the left lung and multiple vertebral osteolytic bone metastases (C, F), bilateral humerus and femur bone marrow cavities showed strip-shaped radiotracer uptake on 18F-Alfatide II PET. 18F-FDG PET only discerned the primary site and bone metastases, but not the abnormality in the bone marrow cavities.
