胸部ディジタル画像を用いた胸腔内貯留液変化量の定量的評価

概要

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EDR is a function of FCR that automatically determines the optimal density of images. This function makes it difficult to evaluate changes in pleural effusion on sequential chest CR. We developed a method to quantify the amount of pleural effusion using the digital value and S value of chest CR. We evaluated the efficacy of the method to quantify the amount of pleural effusion using these values of chest CR in clinical settings. The study period was from December 1996 to January 1999. Study 1 : Chest CR was carried out before and after pleural cavity drainage in 70 cases. The volume calculated with the method using the digital value and S value of CR[x(ml)]was compared with the drained volume[y1]on both sides. Study 2 : Change in pleural effusion was estimated with a method using CT(y2)and with tht method using the digital value and S value of CR(x). The relationship of these two data was investigated. Study 1 : The regression equations between x and y1 were y1=10.5x+21.2(r^2=0.89)on the right side and y1=0.95x+69.7(r^2=0.68)on the left side. Study 2 : The regression equations between x and y2 were y2=0.75x-1.88(r^2=0.70)on the right side and y2=0.87x-1.27(r^2=0.65)on the left side. The method using the digital value and S value of CR was effective for quantifying changes in pleural effusion.
公益社団法人日本放射線技術学会の論文
2000-03-20