Figure 1. PET-CT images of mice (IMAGE) University of Helsinki Caption PET-CT images of mice at 6, 12, 24, and 48 h after oral administration of 20 nm polystyrene particles (top row) and 1 μm polystyrene particles (bottom row). Green border: MIP, blue border: coronal slice, orange border: sagittal slice, and yellow border: transverse slice. Scale is percentage of injected dose per gram of tissue (%ID/g). Credit Outi Keinänen et al. Usage Restrictions Credit: Outi Keinänen et al. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.