Fig. 4.

Average number of cells with more than 2 γH2AX foci in fibroblasts after single- and double-helical CT scan exposure. Data shown in Fig. 3 but expressed as the number of cells with more than 2 γH2AX foci after single- (a) or double-helical (b) CT scan exposure. Each data represents the mean ± SEM of three independent experiments. CT Computed tomography, γH2AX Phosphorylated forms of the H2AX histone variant, SEM Standard error of the mean