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Nowadays, the medical system towards patients changes into the medical services. As the human rights are improved and the capitalism is enlarged, the rights and needs o f patients are gradually increasing. Also, based on this change, several systems in hospitals are revised accord ing to the convenience and needs of patients. Thus, the cases of mobile portable among examinations are getti ng augmented. Because the number of mobile portable examinations in patient’s room, intensive care unit, o perating room and recovery room increases, neighboring patients are unnecessarily exposed to radiation so that the examination is legally regulated. Hospitals have to specify that “In case that the examination is taken out of the operating room, emergency room or intensive care units, the portable medical X-ray protec tive blocks should be set” in accordance with the standards of radiation protective facility in diagnostic ra diological system. Some keep this regulation well, but mostly they do not keep. In this study, we shielded around the Collimator where the radiation is detected and then checked the change of dose regarding that of angles in portable tube and collimator before and after shielding. Moreover, we tried to figure out the effects of shie lding on dose according to the distance change between patients’ beds. As a result, the neighboring areas arou nd the collimator are affected by the shielding. After shielding, the radiation is blocked 20% more than doing n othing. When doing the portable examination, the exposure doses are increased 0°, 90° and 45°in order. At th e time when the angle is set, the change of doses around the collimator decline after shielding. In additio n, the exposure doses related to the distance of beds are less at 1m than 0.5m. In consideration of the shieldin g effects, putting the beds as far as possible is the best way to block the radiation, which is close to 100%. Ne xt thing is shielding the collimator and its effect is about 20%, and it is more or less 10% by controlling the angles. When taking the portable examination, it is better to keep the patients and guardians fa r enough away to reduce the exposure doses. However, in case that the bed is fixed and the patient cannot m ove, it is suggested to shield around the collimator. Furthermore, 90°of collimator and tube is recommend ed. If it is not possible, the examination should be taken at 0°and 45°is better to be disallowed. The rad iation-related workers should be aware of above results, and apply them to themselves in practice. Also, it is recommended to carry out researches and try hard to figure out the ways of reducing the exposure doses and shielding the radiation effectively.

Analysis of dose reduction of surrounding patients in Portable X-ray