Table 5. Biodistribution of the ^99mTc-labeled NPs in male BALB/c nu/nu mice bearing SKOV-3 Xenografts, at 3 and 9 hours after intravenous injection.

Organ	Uptake (% ID/g)		Tumor-to-organ ratio
	3 h	9 h	3 h	9 h
Liver	23.1 ± 1.84	6.50 ± 1.11	0.92	0.95
Kidney	22.73 ± 2.90	6.23 ± 0.96	0.93	0.99
Spleen	13.28 ± 0.81	2.45 ± 0.69*	1.6	2.51
Blood	13.18 ± 0.42*	2.20 ± 0.66*	1.61	2.79
Stomach	4.31 ± 0.20*	0.89 ± 0.39	4.93	6.9
Lung	0.88 ± 0.04*	0.16 ± 0.06*	24.16	38.38
Tumor	21.26 ± 1.27	6.14 ± 1.45	−	−
Bone	0.48 ± 0.14*	0.07 ± 0.03**	44.29	87.71
Thyroid	0.44 ± 0.02*	0.12 ± 0.04**	48.32	51.17
Heart	0.41 ± 0.12*	0.09 ± 0.02**	51.85	68.22
Intestines	0.40 ± 0.14*	0.11 ± 0.04*	53.15	55.82
Muscle	0.23 ± 0.07*	0.04 ± 0.01**	92.44	153.5

^*Significant difference of the % ID/g between tumor and other organs (p < 0.05).

^**Significant difference of the % ID/g between tumor and other organs (p < 0.01).

% ID/g = percent injected dose per gram of tissue.