Table 1.

Thermal enhancement factor (TEF) from the comet assay for heated DU145 spheroids exposed to 15 MV photons at 2 and 4 Gy radiation doses

Dose (Gy)	Mean tail moment*		TEF**
	RT alone	RF HT+RT
2	0.60 ± 0.02	0.89 ± 0.14	1.48
4	0.78 ± 0.03	1.98 ± 0.18	2.54

RF HT; Radiofrequency hyperthermia, RT; Radiation therapy, *; Mean tail moment values in this table were obtained from data shown in Figure 4, and **; Mean tail moment after RF HT+RT divided by mean tail moment after RT alone.