Monitoring early responses to irradiation with dual-tracer micro-PET in dual-tumor bearing mice

Table 1 Ratio of tumor to non-tumor for ¹⁸F-fluorothymidine and ¹⁸F-fluorodeoxyglucose uptake in SW480 and SW620 tumors in mice (mean ± SD)

Tracer	SW480				SW620
	0 Gy	5 Gy	10 Gy	20 Gy	0 Gy	5 Gy	10 Gy	20 Gy
18F-FLT	3.65 ± 0.51	3.75 ± 0.71	3.04 ± 0.35	2.87 ± 0.47b	2.22 ± 0.42	2.47 ± 0.59	2.10 ± 0.55	1.76 ± 0.45a
18F-FDG	2.69 ± 0.98	2.85 ± 0.47	2.62 ± 0.67	2.40 ± 0.52	3.08 ± 1.26	2.92 ± 0.42	3.22 ± 0.56	2.89 ± 0.29

^aP < 0.05,

^bP < 0.01, 3 mice/group.

¹⁸F-FLT: ¹⁸F-fluorothymidine; ¹⁸F-FDG: ¹⁸F-fluorodeoxyglucose.