Fig. 3.

Clonogenic survival data at experimental positions in the proximal, central, and distal regions of the spread-out Bragg peak for AG01522 cells alongside reference 225 kV_p X-ray curves. Survival curves indicate cell survival for (A) 1.2 Gy, (B) 0.8 Gy, (C) 0.6 Gy, and (D) 0.3 Gy per fraction for up to 3 fractions. Error bars indicate standard error of the mean, solid lines represent fits obtained using the fractionated linear quadratic model (equation 2), and dotted lines are for the acute exposures.