[Cooperation of radiobiologists and radiotherapists for progress in radiotherapy]

Although studies of radiobiology are expected to contribute to dictate rational optimal modality in radiotherapy and much has been accomplished in the short history of radiobiology, this advances in radiobiology has not caused yet dramatic increase in the cure rate of cancers. Therefore, how a radiobiologist and a radiotherapist had cooperated up to date was reviewed, especially in applying experimental results on the effect of oxygen on the radiosensitivity of mammalian cells to clinical radiotherapy. It was revealed that one of the main reasons for this failure in cooperation is that a radiobiologist and a radiotherapist has their own terminology and has not communicated well using data useful for each other. What to be performed at present and in future were proposed in the field of radiobiology and in the field of radiotherapy.