患者被曝線量を左右する因子の系統的研究 : 第1報 照射野と管電圧について

大塚 昭義, 東田 善治, 宇津見 博基, 太田 正治, 中西 敬, 横山 敬, 福山 勝

doi:10.6009/jjrt.kj00003104728

In the study of possible reduction in irradiation dose to patients during medical treatments, the following two methods can be considered : (1) To obtain absorbed doses for each part of a body in diagnostic X-ray examinations. (2) To obtain data on factors such as the tube voltage which may affect patient dose. There are a number of reports both at home and abroad concerning the above (1), but very few reports are available concerning the above (2). Moreover, most of them are on fragmentary aspects of each factor and no systematic reports have been made. For this reason, we have taken up, as factors affecting the patient dose, the field size, the tube voltage, and by checking them again, we wanted to obtain some systematic data. Our aim has been fully attained by conducting an experiment. In the ICRP's Publ. 26 issued last year, the idea of the critical organ which had not been fully elucidated in the Publ. 9 was abandoned. As a result, assessment of the irradiation doses has become more rational and the total risk for an individual was obtained. In Japan, the idea proposed in the Publ. 9 is adopted. Therefore, in this paper, we will raise some questions regarding the assessment of the irradiation doses, pointing out at the same time the rationality of the idea put forward in Publ. 26.

患者被曝線量を左右する因子の系統的研究 : 第1報照射野と管電圧について

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