孤立性肺结节(solitary pulmonary nodules,SPN)是指直径≤3cm的圆形或类圆形肺内病灶。此类病变影像学征像复杂多样,特异性较少,单从形态学特征作出定性诊断仍然是临床影像学的难题之一。1资料与方法1.1一般资料收集本院2007年至2008年80例孤立性外周肺结节经手术或病理证实的 Solitary pulmonary nodules (SPN) are round or round-like lesions of the lung that are ≤3 cm in diameter. The imaging features of such lesions are complex and diverse, and their specificity is low. It is still one of the problems of clinical imaging to make a qualitative diagnosis based on morphological features alone. 1 Materials and Methods 1.1 General Information Collection Our hospital from 2007 to 2008 80 cases of isolated peripheral nodules by surgery or pathology confirmed