Table 2. Biodistribution of ₁₈F-FP-PEG₂-β-Glu-RGD₂ in Nude Mice Bearing A549 Xenografts ^a .

Organ	30min	60min
Blood	2.12 ± 0.55	1.59 ± 0.57
Brain	1.62 ± 0.08	1.41 ± 0.14
Heart	1.99 ± 0.19	1.47 ± 0.03
Lung	2.04 ± 0.12	1.65 ± 0.10
Liver	3.14 ± 0.04	2.35 ± 0.26
Pancreas	1.48 ± 0.14	1.15 ± 0.08
Kidney	4.63 ± 1.04	2.66 ± 0.25
Spleen	2.55 ± 0.15	1.72 ± 0.13
Intestine	2.49 ± 0.34	1.64 ± 0.13
Muscle	0.94 ± 0.18	0.86 ± 0.06
Stomach	1.61 ± 0.04	1.22 ± 0.21
Bone	1.17 ± 0.21	0.88 ± 0.10
Tumor	3.38 ± 0.23	2.68 ± 0.25
Tumor to Muscle ratio	3.60	3.12

^aMeans ± SD (n = 4). Data are average % ID/g.