目的 分析磨玻璃密度肺结节的 CT影像学特征及其与病理特征的相关性。 方法 将2015年1月-2017年12月间于我院 行CT检查有磨玻璃密度肺结节的86例患者 纳入研究范围，回顾性分析其CT影像学资 料，包括病灶位置、大小、形态、边界、 边缘、内部结构特点、周围结构特点等。 结果 86例患者均为单发病灶，纯磨玻璃 肺结节35例，混杂磨玻璃肺结节51例，肺 癌或癌前病变占比65.12%(56/86)，良性 病变占比34.88%(30/86)；良性病变中边 界模糊病例显著高于肺癌或癌前病变，边 界清晰毛糙状病例、病灶边缘分叶、毛刺 病例显著低于肺癌或癌前病变，胸膜凹陷 征、血管集束征病例显著低于肺癌或癌 前病变，小叶间隔增厚病例显著高于肺 癌或癌前病变，差异均有统计学意义(P ﹤0.05)；但良恶性病变在病灶位置、大 小、形态、边界光滑、支气管充气征、含 气腔隙等CT征像表现差异无统计学意义(P ﹥0.05)。结论 良恶性磨玻璃结节病灶在 病灶边界，边缘、周围结构上有一定差异 性，或能为良恶性磨玻璃密度肺结节的诊 断鉴别提供参考依据。

Objective To analyze the CT imaging characteristics of pulmonary ground glass density nodules and their correlation with pathological features. Methods 86 patients with pulmonary ground glass density nodules examined by CT in the hospital from January 2015 to December 2017 were enrolled in the study, and their CT imaging data, including the location, size, shape, boundary, internal structure and surrounding structure were analyzed retrospectively. Results Lesion of the 86 patients were single lesions. 35 cases were pure pulmonary ground glass nodules and 51 cases were pulmonary ground glass nodules. Lung cancer or precancerous lesions accounted for 65.12%(56/86), and benign lesions accounted for 34.88% (30/86).The proportion of fuzzy boundary in benign lesionswas significantly higher than that inlung cancer or precancerous lesions, while proportions of clear and coarse boundary,lobulation of lesions edge and spiculation were significantly lower than those in lung cancer or precancerous lesions. The proportions of pleural indentation and vascular convergence sign in benign lesions were significantly lower than those in lung cancer or precancerous lesions, while the proportion of interlobular septal thickening was significantly higher than that in lung cancer or precancerous lesions(P<0.05). However, there was no significant difference in CT signs, such as the location, size, shape, smooth boundary, air bronchogram and lacuna containing airbetween benign and malignant lesions (P>0.05). Conclusion There are differences between benign and malignant ground glass nodules in the boundary, edge and surrounding structure of lesions, which can provide references for diagnosis and differential diagnosis of benign and malignant ground glass nodules.