目的 探讨多层螺旋CT常规扫描 及后处理技术在肺隔离症中的应用价值。 方法 选取我院2015年5月-2017年12月收 治的肺隔离症患者21例，收集其临床资 料、影像学资料等，分析、总结21例肺隔 离症患者CT平扫及在不同后处理技术中的 的影像表现。结果 多层螺旋CT平扫显示 21例肺隔离症患者均位于下肺后基底段， 发病部位：左肺12例，右肺9例；疾病类 型：叶内型13例，叶外型8例。CT平扫病 灶呈现囊性者4例，均为多房性，内含液 性成分，囊壁厚薄不一等；呈实性肿块者 4例，有明显强化，边缘清楚；显示为囊 实性混合肿块者13例，实质性成分内出现 多个囊性区合并有气体，增强后未见明显 强化；1例患者病灶毗邻血管增粗。经MIP 轴位、VR后处理，21例患者均发现来自体 循环的供血动脉、引流静脉共22支，19支 由胸主动脉供血，引流入肺静脉系统，2 支由腹主动脉上段供血，1支由腹腔干供 血。结论 多层螺旋CT常规扫描及后处理 技术可清晰显示肺隔离症的外观形态、血 管分布情况，为临床制定手术方案提供影 像学资料。

Objective To explore the application value of conventional multi-slice spiral CT scanning and post-processing technology in pulmonary sequestration. Methods A total of 21 patients with pulmonary sequestration admitted in our hospital from May 2015 to December 2017 were selected, and the clinical data and imaging data were collected, analyze and summarize the image manifestations of CT non-enhanced scan and the postprocessing techniques. Results Multi-slice CT non-enhanced scan showed that 21 cases located in the posterior basal segment of the lower lung. Type of disease: 13 cases of intrapulmonary sequestration, 8 cases of leaf pattern pulmonary sequestration. There were 4 cases of cystic lesions in CT plain scan, all of which were multilocular, the cysts contain liquid components, and the thickness of the cysts was not uniform. There were 4 cases of solid lesions, with obvious enhancement and clear edge. There were 13 cases of cystic solid mixed mass, and there were multiple cystic areas with gas in the lesions, with no obvious enhancement. The adjacent vessels of 1 lesions were thickened. According to the axial position of MIP and VR images, a total of 22 blood supply arteries and drainage veins from the systemic circulation were found in 21 patients. The overall appearance of blood supply arteries and venous drainage vessels was dynamically tracked. Nineteen cases were supplied by thoracic aorta and drained into pulmonary vein system, two by the upper segment of the abdominal aorta, and one by the peritoneal trunk. Conclusion Conventional multislice spiral CT scanning and post-processing technology can clearly display the appearance and vascular distribution of pulmonary sequestration, which provide reliable imaging evidence for the clinical operation plan.