Figure 3c:

Coronal micro-PET images showed different whole-body biodistribution patterns among (a) radiolabeled targeted MBs, (b) radiolabeled antibodies alone, and (c) free SFB in living mouse. (a) Targeted MBs accumulated primarily in liver (arrow) and spleen (arrowhead) at 60 minutes after intravenous injection. (b) Radiolabeled antibodies alone showed high activity retained in blood pool (thin arrows) even after 60 minutes. Uptake in supraaortic vessels (arrowheads) and liver (thick arrow) were observed. (c) Free SFB cleared through kidneys (arrows).