近年来螺旋CT的广泛应用和肺癌CT普查的提倡和应用,孤立性肺结节(solitary pulmonary nodule,SPN)的检出率越来越高。但其诊断和良恶性的鉴别诊断一直是临床和影像学的难点和重点。尽管目前评估孤立性肺结节的诊断技术有了很大的进展,但形态学改变仍为影像学诊断肺结节的主要依 In recent years, the widespread use of spiral CT and CT lung cancer advocacy and application of solitary pulmonary nodules (solitary pulmonary nodules, SPN) detection rate is getting higher and higher. However, its diagnosis and differential diagnosis of benign and malignant has been the clinical and imaging difficulties and priorities. Although there has been considerable progress in the diagnostic techniques for the assessment of solitary pulmonary nodules, morphological changes remain the primary basis for the imaging diagnosis of pulmonary nodules