Table 2.

γH2AX foci per cell before RT, 30 min after ex vivo exposure to 0.5 Gy or 30 min after the first fraction of RT

RT	EWBD (mSV)	γH2AX foci per cell
		Before RT 0 Gy	Ex vivo 0.5 Gy	Post RT
Orthovoltage	2.52	0.011	n.a.	0.106
	2.36	0.167	5.44	0.186
	2.79	0.051	4.81	0.072
	3.49	0.200	5.23	0.211
	2.44	0.310	6.15	0.215
	2.55	0.169	5.98	0.816
	3.24	0.940	7.32	1.371
	3.15	0.200	5.82	0.321
	2.34	0.147	5.02	0.272
	2.39	0.071	4.88	0.199
Mean ± SD	2.73 ± 0.42	0.227 ± 0.265	5.63 ± 0.80	0.377 ± 0.406
Linac	9.99	0.076	5.46	0.183
	13.48	0.183	6.81	0.358
	9.97	0.060	6.23	0.745
	14.67	0.239	n.a.	0.446
	10.96	0.093	5.77	0.074
	13.30	0.252	6.02	0.199
	9.50	0.109	5.33	0.210
	12.63	0.025	5.84	0.010
Mean ± SD	11.81 ± 1.95	0.130 ± 0.085	5.92 ± 0.499	0.278 ± 0.235
All patients Mean ± SD	5.26 ± 3.90	0.184 ± 0.206	5.76 ± 0.680	0.333 ± 0.335

RT radiation therapy, EWBD equivalent whole-body dose, SD standard deviation, Linac linear accelerator