目的 探讨肺癌高危患者经多层 螺旋CT筛查诊断的影像特点。方法 选取 体检时被筛选为肺癌高危人群的107例受 试者为研究对象,均予以多层螺旋CT筛 查，对筛查结果显示为疑似肺癌者给予病 理检查，详细记录检查结果，分析多层螺 旋CT在肺癌筛查诊断中的诊断符合率；归 纳整理肺癌确诊患者及非肺癌患者多层螺 旋CT的影像特点。结果 ①107例肺癌高危 患者中，经多层螺旋CT筛查为疑似肺癌者 共78例，发现可疑癌结节60个，可疑癌肿 块20个，共计80个；经多层螺旋CT筛查为 疑似肺癌的78例患者中，经病理检查确诊 为肺癌者64例，多层螺旋CT在肺癌筛查 诊断中的诊断符合率为82.1%(64/78)； 其中癌结节55个(83.3%)，癌肿块11个 (16.7%)，共计66个；②肺部癌灶为结节 者53例(82.8%)，检出癌结节55个，平均 结节大小为1.8cm，其中33个(60.0%)合并 明显CT征象，剩余22个(40.0%)未合并CT 征象；肺部病灶为肿块者11例(17.2%)， 检出癌肿块11个，平均结节大小3.5cm， 其中7个(63.6%)合并明显CT征象，剩余4 个(36.4%)未合并CT征象。结论 肺癌确诊 患者中癌结节所占比例较癌肿块高，多层 螺旋CT影像特征性较为明显。

Objective To investigate the imaging characteristics of high-risk patients with lung cancer screened and diagnosed by multi-slice spiral CT. Methods 107 subjects screened as high- risk group of lung cancer when receiving physical examination were selected as the research objects and were screened by multi-slice spiral CT. Patients whose screening results showed suspected lung cancer were given pathological examination and the results were recorded in detail. The accordance rate of multi-slice spiral CT in the screening and diagnosis of lung cancer was analyzed; The imaging characteristics of multi-slice spiral CT of patients with and without lung cancer were summarized and reorganized. Results ①Among the 107 high-risk patients with lung cancer, 78 cases were with suspected lung cancer screened by multi-slice spiral CT. 60 suspected cancer nodules and 20 suspected masses were found, a total of 80. Among the 78 patients with suspected lung cancer screened by multi-slice spiral CT, 64 patients were confirmed with lung cancer by pathological examination. The coincidence rate of multi-slice spiral CT in screening and diagnosis of lung cancer was 82.1% (64/78), including 55 (83.3%) cancer nodules, 11 (16.7%) cancer masses, a total of 66. ②There were 53 cases (82.8%) of lung neoplastci foci as nodules and 55 cancer nodules detected. The average size of the nodules was 1.8cm, including 33 (60.0%) complicated with obvious CT signs and the remaining 22 (40.0%) not. The pulmonary lesions were masses in 11 cases (17.2%) and 11 cancer masses were detected. The average size of nodules was 3.5cm, including 7 (63.6%) complicated with obvious CT signs and the remaining 4 (36.4%) not. Conclusion The proportion of cancerous nodes is higher than that of tumor masses in patients diagnosed with lung cancer. The imaging findings of multi-slice spiral CT are obvious.