Figure 1:

In vivo biodistribution of intravenously injected ¹⁸F-labeled targeted MBs measured by using region-of-interest–based analysis of dynamic micro-PET data sets in nude mice (n = 4). Rapid uptake and retention of targeted MBs were observed in both liver and spleen. Targeted MBs cleared quickly from blood, with almost background levels observed 30 minutes after intravenous administration of imaging agent. Error bars were omitted for better visibility.