[Radiological clinical practice and its safety in hospital].

Medical radiation exposures are increasing world-wide and especially in Japan, because of the progress in medical care. In order to keep the patients safe from medical exposure, we should know not only possible radiation injuries through the radiological interventions provided to the patients, but also the factors which increase or decrease medical exposure. In addition, we have to keep aware of the radiation dose level exposed to the patients, every time we use medical radiation to our patients. Continuing educations and guidelines on medical exposure and consciousness of the dose level are helpful in decreasing the patients' medical exposures, and in consequences, also in protecting ourselves from occupational exposures.