Micro-PET and biodistribution of 64Cu-AMD3100 in lung tumors. a Representative photographs of liver and lung tumors from mice at 3 weeks after intravenous injections with either CHO-XR4 or 3LL-XR4 cells. b Micro-PET images of mice bearing lung tumors after injection of 64Cu-AMD3100, from right to left: CHO-XR4 lung tumors, coronal view; 3LL-XR4 lung tumors, sagittal view; 3LL-XR4 lung tumors, coronal view; and coronal view of mouse with 3LL-XR4 lung tumors also injected with excess unlabeled AMD3100/plerixafor. Data in a and b are from individual CHO-XR4 and 3LL-XR4 mice and are representative of three mice. c Biodistribution of 64Cu-AMD3100 in CHO-XR4 lung and liver tumors or (d) 3LL-XR4 lung tumors, and blocking with excess unlabeled AMD3100/plerixafor. Bars show means±SD. Bracketed horizontal lines indicate significantly lower percent of injected dose per gram in mice also injected with excess unlabeled AMD3100/plerixafor. Data are from two to three mice.