ディジタル画像システムを用いた患者被曝線量の推定

概要

論文の詳細を見る
A new method was investigated to estimate patient dose by the use of a digital imaging system such as a computed radiography system. With this method, the patient dose was assumed to be comparable to the absorbed dose at the directly irradiated region of a detector. Two approaches were examined based on the histrogram of image data and also the image indices of a digital imaging system such as S and L of a computed radiography system for estimating the absorbed dose. The correlation coefficient between the actual patient dose calculated from the exposure condition for chest radiography and the estimated patient dose by use of histogram data was very high(R=0.943). Estimated patient dose calculated by use of image indices S and L showed a relatively low correlation coefficient(R=0.789). Although this method provides a rough estimation, we believe that it can be useful as a simple and practical way to monitor patient dose during routine examinations using a digital imaging system.
社団法人日本放射線技術学会の論文
2001-07-20