Uemura Masahiko, Miyagawa Masao, Yasuhara Yoshifumi, Murakami Tadashi, Ikura Hirohiko, Sakamoto Kana, Tagashira Hiroyuki, Arakawa Kenji, Mochizuki Teruhito
Department of Radiology, Ehime University School of Medicine, Shitsukawa, Toon, Ehime 791-0295, Japan.
Radiat Med. 2005 Sep;23(6):391-7.
The purpose of this study was to assess the effect of dual-exposure dual-energy (DE) subtraction chest radiography with flat-panel detector.
One hundred patients underwent dual-exposure DE subtraction chest radiography and chest CT for evaluation of pulmonary nodules. Fifty-two patients with pulmonary nodules and 48 patients with normal lungs were selected for receiver operating characteristic (ROC) curve analysis. Ten radiologists who were unaware of the CT results evaluated chest radiography alone and chest radiography with DE subtraction images in the detection of pulmonary nodules. For each radiologist, we calculated the areas under the ROC curve (Az) for chest radiography alone and chest radiography with DE subtraction images.
The average detectability of dual-exposure DE subtraction chest radiography was statistically significantly higher than that of chest radiography without subtraction images (mean Az value increased from 0.784 to 0.815, p<0.001).
Dual-exposure DE subtraction chest radiography improves diagnostic accuracy of pulmonary nodules.
本研究旨在评估平板探测器双曝光双能量（DE）减影胸部X线摄影的效果。
100例患者接受双曝光DE减影胸部X线摄影和胸部CT检查以评估肺结节。选取52例肺结节患者和48例肺部正常患者进行接受者操作特征（ROC）曲线分析。10名不知CT结果的放射科医生分别评估单纯胸部X线摄影以及结合DE减影图像的胸部X线摄影在肺结节检测中的表现。对于每位放射科医生，我们计算了单纯胸部X线摄影以及结合DE减影图像的胸部X线摄影的ROC曲线下面积（Az）。
双曝光DE减影胸部X线摄影的平均可检测性在统计学上显著高于未减影图像的胸部X线摄影（平均Az值从0.784增加到0.815，p<0.001）。
双曝光DE减影胸部X线摄影提高了肺结节的诊断准确性。
