Figure 4

Dose dependent tumour volume doubling times for 200 kV X-ray irradiation. KHT tumour volume doubling times for the unirradiated control (8 mice) and after irradiation with 200 kV X-rays (0 Gy (4); 3.8 Gy (8); 7.6 Gy (10); 9.5 Gy (8); 13.2 Gy (7)) determined on basis of the tumour volume at which the animals were included in the experiment. Compared to the unirradiated control the VDT values for doses of 7.5 Gy and higher were significantly increased (*p < 0.05, ***p < 0.001).