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Hadron beams have attractive growing interest for cancer treatment owing to their high dose localization at the Bragg peak and owing to high biological effect there, especially for heavy-ion beams. Recently, therefore, hadron cancer radiotherapy has been successfully carried out at various facilities and several facility construction projects have also been progressing in the world, based on the development of the accelerator and beam-delivery technologies. This report will review the development of the accelerator and beam-delivery technologies in the hadron beam radiotherapy facilities in the world.
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