肺部孤立结节（solitarypulmonarynoduleSPN）的鉴别诊断目前仍有相当困难。本文拟通过CT增强扫描，观察不同性质的肺内孤立结节强化程度和强化类型，从而探讨其鉴别诊断价值。1材料与方法1．1研究对象：先由常规CT平扫显示肺部孤立结节，直径≤3cm，无空洞、大的液化坏死或 Pulmonary solitary pulmonary nodules (solitarypulmonarynoduleSPN) differential diagnosis is still quite difficult. This article intends to enhance the scan by CT, to observe the different nature of the isolated lung nodules enhancement and enhancement type, to explore its differential diagnosis value. 1 Materials and Methods 1.1 Subjects: plain CT plain lung nodules, diameter ≤ 3cm, no empty, large liquefied necrosis or