診断X線被曝によるリスク評価についての考察

概要

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On the evaluation of radiation risk, the absorbed dose by specific organs, such as the skin or the gonads, is usually described, but it has been difficult to estimate the overall risk of patient exposed to radiation. The total energy imparted is one of the method often used for the relative estimation of total radiation risk. In this paper, its variability depending upon the condition of the X-ray exposure was evaluated and compared with the variability of skin exposure dose, the most commonly available data. Parallel variability of total energy imparted to skin radiation dose was detected as the tube voltage or the thickness of the phantom were changed or as the filter or the grid was added. Then, upon the change of FFD or field area, an independent or opposite variability was observed. Nevertheless, the skin dose-irradiated area product [rad. cm^2] registered similar variability to the total energy imparted upon changes of those mentioned factors. Consequently, it was demonstrated that the skin dose-irradiated area product [rad. cm^2], an easier to measure value, provided the relative estimation of the total radiation risk as well as the total energy imparted.
公益社団法人日本放射線技術学会の論文
1982-07-01