CT检查在石棉肺诊断中的价值

目的　研究石棉肺的肺实质和胸膜病变的ＣＴ 检查所见。方法　对１９ 例石棉肺患者进行胸部Ｘ 线和ＣＴ 检查， 比较Ｘ 线和ＣＴ 检查对石棉肺患者肺实质改变和胸膜改变的表现特点和检出结果。结果　Ｘ 线胸片有胸膜改变的５例， 其中１ 例为胸膜斑。ＣＴ 检查发现有胸膜改变的１６ 例， 其中６ 例为胸膜斑； ６ 例有胸膜斑的病例中， 有３ 例为Ｘ 线胸片上难以发现的脊椎旁胸膜斑。肺实质改变， 在Ｘ 线胸片上， 在３ 个病例各发现１ 个大阴影； 而ＣＴ 检查， 在４ 个病例中， 共发现５ 个大阴影， 其中１ 例伴有胸膜下曲线状肺纤维化阴影。肺内小阴影的显示， ＣＴ 检查所见不如Ｘ 线所见的密集。结论　联合应用胸部Ｘ 线和ＣＴ 检查结果， 可为石棉肺的诊断和分级提供较有价值的信息。

Evaluation of CT scanning in diagnosis for asbestosis

Objective To study lung parenchymal and pleural changes in patients with asbestosis in their computerized tomography(CT)scanning.Methods Appearance of lung parenchymal and pleural changes in patients with asbestosis in chest X ray film and CT scanning was compared.Results Nineteen patients with asbestosis were chest X rayed and CT scanned.Pleural changes were found in five cases in chest X ray film with one of pleural plaque,and in 16 cases with CT scanning with six of pleural plaque,three of whom with paravertebral pleural plaque usually difficult to reveal in X ray film.A large shadow was found in the lung of each of three cases with chest X ray film,and five large shadows were found in four cases with CT scanning,one of whom with subpleural curvilinear linecfibrosis.Small opacities in the lungs were less densely distributed in CT scanning than in X ray film.Conclusion Combination of chest X ray film and CT scanning can provide useful information in diagnosis and classification of asbestosis.