経時的差分処理に及ぼす胸部CR画像圧縮の影響

概要

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We investigated the effect of image ata compression on temporal subtraction images in chest computed radiography (CR). Subtraction images were obtained from current and previous CR chest images which were represented by either original data or 1/20 lossy compression data. One hundred clinical cases were employed in this study. The visual evaluation and histogram analysis indicated that the lossy compression did not affect the image quality in lung fields of the subtraction image. However, the standard deviation of pixel values in the mediastinum of the subtraction image obtained from compressed images was decreased probably becouse of smoothing in the image compression process. Therefore, we conclude that the use of compressed chest CR image data is suitable for temporal subtraction images.
社団法人日本放射線技術学会の論文
2001-08-20