Fig. 5From: Difference in the relative biological effectiveness and DNA damage repair processes in response to proton beam therapy according to the positions of the spread out Bragg peakCorrelation between the mean number of foci per cell at 24 h after the irradiation and the survival fraction after 8 Gy proton beam irradiation (SF8). The clear and filled circles show the irradiated #1 and #2, respectively. The clear and filled squares show the results for position #3 and position #4, respectively. Error bars indicate the standard error of the mean. A strong negative correlation between the mean number of foci formed per cell and the SF8 was observed in the OE21 cells, and a significant correlation was also found in the KYSE450 cells (p = 0.004)Back to article page