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目的探讨成人间质性肺气肿的CT表现。方法2例运动后胸闷憋气患者行胸部CT扫描并做薄层重建，分析其影像表现。结果2例患者均发现纵隔及皮下积气，1例患者还发现肺小叶间隔及支气管血管鞘内积气。结论间质性肺气肿具有典型CT表现，HRCT有利于肺内改变的发现。“,”Objective Approaching the CT appearance of adult pulmonary interstitial emphysema. Methods 2 patients with postexercised chest distress were performed CT scanning and think slice reconstruction. To analyze their CT imaging appearances. Results Mediastinal septum and subcutaneously pneumatosis was found in 2 patients. In addition, interlobular septum and bronch-vagina pneumatosis was found in 1 patient. Conclusion Pulmonary Interstitial Emphysema has typical CT appearance. HRCT is favourable to find the change in lung.