Figure 2

The geometries of various X-ray experiments: (A) for kilo-voltage X-rays such as 60 kVp, 100 kVp, 200 kVp, 250 kVp, (B) for in-field irradiation with 6 MV linac X-rays at various depths from the surface (1 cm-10 cm), and (C) for out-of-field irradiation with 6 MV linac X-rays at 10 cm depth from the surface. Cultured CHO-K1 cells in plateau phase were located at the isocenter and exposed to 1 Gy of X-rays.