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PET/CT imaging of the blocking study in subcutaneous HT29 tumor-bearing mice. (A) Representative PET/CT images of HT29 tumor-bearing mice after injection of 18F-RWY only (left) or accompanied with a blocking dose of 1 mg of nonradiolabeled RWY peptide (right). (B) Quantification of radiotracer uptake in the tumor. The statistical analysis was performed using Student’s t-test, n = 3, **p < 0.01.
