新型冠状病毒肺炎（Coronavirus Disease 2019，COVID-19）的诊断需要结合流行病学史、实验室检查、临床表现和 影像学表现，确诊需要新型冠状病毒的核酸检测。但是，约30%~40%患者的CT影像特征符合COVID-19表现，但核酸检测 结果为阴性。本文归纳整理了COVID-19的影像表现，发现其CT征象具有一定的特征性，如单发或多发磨玻璃阴影，其内 纹理呈网格状改变等。基于COVID-19的典型CT征象，可帮助放射医生及一线防疫医生对COVID-19做出早期诊断，进而制 定相应的医学隔离措施。

Coronavirus disease 2019 (COVID-19) is diagnosed by the combination of epidemiological and clinical features, laboratory examination and imaging characteristics. The disease was confirmed by the real time reverse-transcription-polymerase chain-reaction (RT-PCR) for novel coronavirus. However, some patients (about 30%-40%) with positive chest CT findings may present with negative results of RT-PCR for novel coronavirus. In this report, we presented the typical chest CT findings of COVID-19. We found that the CT signs had certain characteristics, such as single or multiple ground glass opacity, and with crazy paving pattern, etc. The typical CT characteristics may help for the radiologists and frontline doctors to make early diagnosis for COVID-19 and further plan correct prevention and control decision.