孤立性肺结节(Solitary Pulmonary Nodule, SPN)又称钱币样病变(coin lesion),自被O’Brien E.J., etrral首次提出后一直受到临床和放射医生的普遍关注。其胸片特征主要被描述为肺内的孤立性病灶,圆形或类圆形,边缘多锐利,含有或不含钙化,临床无症状,常于体检时发现,气管镜难以取得组织学检查。随着CT特别是螺旋CT的出现和发展,由于其所具有的容积数据采集和多种图象重建算法,以及CT增强扫描技术的应用,进一步克服了普通平片及CT的不足,减少了SPN遗漏的概率并显著提高了SPN的内部与外部特征的显示,为SPN的进一步定位定性诊断提供了有力的帮助。 Solitary Pulmonary Nodule (SPN), also known as coin lesion, has been the subject of widespread clinical and radiological attention since it was first proposed by O’Brien E.J., etrral. Its chest radiograph is characterized primarily by isolated solitary lesions in the lung, round or oval, sharp edges, with or without calcification, and asymptomatic clinical practice. It is often found on examination that it is difficult to obtain a histological examination of the tracheoscope. With the emergence and development of CT, especially spiral CT, due to its volume data acquisition and a variety of image reconstruction algorithms, as well as the application of CT enhanced scanning technology to further overcome the lack of plain film and CT, reducing the SPN The probability of omission and the appearance of internal and external features of SPN are significantly improved, which provides a powerful help for the further qualitative localization of SPN.