A translational research for promotion of multimodality therapy combined with proton beam therapy

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The aim of this study is to promote translational research for multimodality therapy combined with proton beam therapy (PBT). We found increasing radiobiological effect on late phase of bragg peak, and also detected apoptosis in the crypt cells irradiated with very low dose of proton. For normal tissue reaction, dose-volume relationship was clearly found both in rib fracture on PBT for liver cancer and in pneumonistis on PBT combined with chemotherapy for advanced lung cancer. Finally, from these translational researches, we have started clinical trials for advanced lung cancer and pediatric cancer as a multimodality therapy combined with PBT.