肺内孤立小结节(直径≤3cm)的定性诊断十分重要,关系到其治疗方法和预后。但是,在实际工作中,肺内孤立小结节的定性诊断仍是肺部疾病诊断中的重点和难点,充分显示其特征是诊断的关键 [1]。鉴于此,笔者收集 26例经病理证实的以肺内孤立小结节为表现的周围型肺癌,对其完整CT Isolated small nodules in the lung (diameter ≤ 3cm) qualitative diagnosis is very important, related to its treatment and prognosis. However, in practical work, the qualitative diagnosis of isolated small nodules in the lung is still the key and difficult point in the diagnosis of pulmonary diseases, which fully shows that its characteristics are the key to diagnosis [1]. In view of this, the author collected 26 cases of pathologically confirmed small pulmonary nodules in the performance of peripheral lung cancer, its complete CT