目的 探讨严重急性呼吸综合征(SARS)的X线平片与CT特征。资料与方法 回顾性分析17例经临床证实为SARS的X线平片与CT表现。结果 X线平片显示双肺受累12例,CT显示13例。X线平片与CT共显示双肺受累15例,受累肺叶46叶,受累肺段103个。14例病变主要表现在肺的周边部,且以下叶多见。9例病变进展迅速。结论 SARS的影像表现是肺内出现浸润性病变,分布在肺周边部,下叶多见,进展迅速。结合临床可提供诊断依据。 Objective To investigate the X-ray and CT features of severe acute respiratory syndrome (SARS). Materials and Methods Retrospective analysis of 17 cases of clinically confirmed SARS X-ray and CT findings. Results X-ray showed that lung involvement in 12 cases, CT showed 13 cases. X-ray and CT showed a total of 15 cases of bilateral lung involvement, involvement of lung lobes 46, affected 103 segments of the lung. 14 cases of lesions mainly in the peripheral part of the lung, and more common in the following leaves. Nine cases progressed rapidly. Conclusion The SARS imaging manifestation is infiltrative lesions in the lung, which are distributed in the periphery of the lung. The lower lobe is more common and progresses rapidly. Combined with clinical diagnosis can provide basis.