Figure 1From: Comparison of the effects of photon versus carbon ion irradiation when combined with chemotherapy in vitroCombination experiments of 4 chemotherapeutic drugs in WiDr cell line, as indicated. Clonogenic radiation survival of log-phase WiDr cells. Cells were irradiated with photons or carbon ions only or directly after a 4-hour treatment with camptothecin, cisplatin, gemcitabine or paclitaxel and a following medium change. Data points are mean values (plus standard deviations) from three independent experiments. The survival curves were derived from a fit of the linear-quadratic survival expression to the data.Back to article page