局灶性肺磨玻璃结节的低剂量胸部CT特征分析

Characteristic Analysis of Low Dose Chest CT of Focalpulmonary Ground-Glass Nodule

目的分析肺部局灶性磨玻璃结节低剂量胸部CT影像学特点。方法回顾分析47例经病理和临床证实的肺部局灶性磨玻璃结节患者影像资料,先对肺部局灶性磨玻璃结节进行病理分组,再对结节的边缘情况、内部结构及邻近结构做对比分析。结果47例肺磨玻璃结节中纯磨玻璃结节21例,混合磨玻璃结节26例,其中浸润性腺癌30例,浸润前病变11例,炎性病变6例。浸润性腺癌病灶边缘多表现为“分叶征”及“毛刺征”,结节内部多表现为“空泡征”和“微血管征”,结节邻近结构多表现为胸膜“凹陷征”和血管“集束征”。结论低剂量胸部CT筛查能提早发现肺磨玻璃结节,结节的边缘、内部和邻近结构等CT特征可在一定程度上反映磨玻璃结节病理类型。

Objective To analyze the imaging features of lung solitary ground-glass nodule in chest low dose CT.Methods The imaging data of 47 cases of pulmonary focal ground-glass nodule confirmed by pathology and clinical were analyzed retrospectively.First,the local ground-glass nodule of the lung were divided into pathological groups,then the edge,internal structure and adjacent structure of the nodules were compared and analyzed.Results Among 47 cases,pGGN was found in 21 cases,mGGN was found in 26 cases,including 30 cases of invasive lesions,11 cases of pre-invasive lesion and 6 cases of benign lesions.most of invasive lesionswere presented with margination burr,lobulation sign,vacuolation sign,macrovessel sign,pleura indentation and vessel convergence.Conclusion Early detection of lung ground-glass nodule by low dose chest CT screening can find the lung ground-glass nodule early.CT features of the edge,interior and adjacent structures of the nodulecan reflect pathological type of ground-glass nodule to some extent.