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PET-CT coronal images showing the biodistribution of radiolabeled compounds after endotracheal aerosolization in uninfected rats. Shown are PET-CT images obtained at different time points of [124I]NaI (control) (A), [124I]AA139 (B), [124I]AA139-PNP (C), and [124I]AA139-MCL (D). PET images have been overlaid with CT images of the same animals for accurate location of the radioactive signal.
