【摘要】 目的　探讨胸腔积液所致球形肺不张的CT特征。方法　采用常规CT和高分辨CT扫描 ,分析球形肺不张的CT表现 ,并与穿刺结果及手术结果相对照。结果　球形肺不张单发占 95 2 4 % ,平均年龄 2 4 36岁 ,大小均值为 2 37cm ,右叶占 5 9 0 9% ,左叶占 4 0 91% ,下叶后外基底段占 5 9 0 9%。胸膜局限性增厚和与胸膜的锐角夹角出现率为 95 4 5 % ;彗星尾征出现率为 81 82 %。结论　胸膜局限性增厚、彗星尾征及胸膜的锐角夹角为胸腔积液致球形肺不张最基本的特征更多还原

【Abstract】 Objective To evaluate the CT features of round atelectasis induced by pleural effusion.Methods Using routine and high resolution CT scan.The CT features of round atelectasis was analyzed and contrasted with the outcome of percutaneous needle biopsy and operation.Results The single lesion of round atelectasis is 95.24%.The average age is 24.36 years old.The average size is 2.37cm,the right lung is 59.09%,the left is 40.91%,hind lateral base segment of inferior lobe is 59.09%,pleural local thickening and acute angle to pleura is 95.45%,comet tail sign is 81.82%.Conclusion The pleural localization thickening,acute angle to pleura and comet tail sign is essential feature.更多还原