[摘要] 目的 探讨肺原位腺癌的临床和能谱CT低剂量扫描的影像学表现。 方法 回顾分析近3年来该院经手术病理证实的肺原位腺癌28例患者的资料，所有患者均行能谱CT低剂量扫描。 结果 CT表现为混合磨玻璃结节影15例，磨玻璃结节影9例，实性结节影2例，模糊小斑片状密度增高阴影2例；病灶最大径均小于30 mm，其中最大径10～20 mm 22例。结节边缘模糊26例、清楚2例，分叶、毛刺20例，病灶内密度不均匀26例，均匀2例，可见局部支气管充气征15例。所有病例无一例发现远处或淋巴结转移。 结论 肺原位腺癌CT多表现为磨玻璃或混合磨玻璃结节影，小部分为实性结节影及小斑片状稍高密度影。能谱CT低剂量扫描能清晰地显示肺原位腺癌的影像学特征，对肺原位腺癌诊断具有重要的临床价值。

    [关键词] 肺原位腺癌；影像诊断；低剂量扫描；断层摄影术；X线计算机

    [中图分类号] R734.2 [文献标识码] B [文章编号] 1673-9701(2016)20-0095-03

    [Abstract] Objective To discuss the imaging performance of pulmonary adenocarcinoma in situ by clinical and energy spectrum CT low-dose scanning. Methods 28 patients with pulmonary adenocarcinoma in situ confirmed by surgery and pathology in recent 3 years were reviewed and all patients were given energy spectrum CT low-dose scanning. Results 15 cases were mixed ground-glass nodular shadow ......