摘要目的：评价螺旋CT三维重建在肺部占位性病变诊断及鉴别诊断中的价值。方法选择有病理诊断的肺部占位性病变患者100例，按数字表法随机分为对照组50例和观察组50例，对照组采用 CT 常规扫描，观察组采用 CT 三维重建后处理技术检查，对两组肺部占位性病变、肺门淋巴结转移与纵隔淋巴结转移的灵敏度、特异性及准确率进行对比分析。结果对照组肺部占位性病变诊断的灵敏度为75％、特异性50％、准确率72％，观察组肺部占位性病变诊断的灵敏度为80％、特异性65％、准确率85％，两组差异均有统计学意义（χ2＝3．854、4．604、5．007，均 P ＜0．05）。对照组诊断肺门淋巴结转移的灵敏度为60％、特异性72％、准确率70％，观察组诊断肺门淋巴结转移的灵敏度为76％、特异性84％、准确率84％，两组差异均有统计学意义（χ2＝5．882、4．196、5．534，均 P ＜0．05）。对照组诊断纵隔淋巴结转移的灵敏度为62％、特异性57％、准确率60％，观察组诊断纵隔淋巴结转移的灵敏度为72％、特异性73％、准确率72％，两组差异均有统计学意义（χ2＝4．342、5．626、4．583，均 P ＜0．05）。结论螺旋 CT 三维重建对肺部占位性病变的诊断定位效果好，可在肺部占位性病变的诊断中广泛运用。

abstractsObjective To evaluate the value of spiral CT in diagnosis and treatment of lung lesions in clini-cal work.Methods A retrospective analysis of 100 patients with pathological diagnosis of lung lesions patients were randomly divided into the control group (CT normal scan)and observation group (CT -D post -processing tech-niques).Lungs lesions,hilar and mediastinal lymph node metastasis sensitivity,specificity and accuracy of lymph node metastasis of both group were analyzed.Results In the control group,the diagnosis of lung lesions showed sensitivity of 75%,specificity of 50% and accuracy of 72%;while in the observation group the sensitivity was 80%,specificity was 65 % and accuracy rate was 85%.The differences between the two groups were statistically signficant(χ2 =3.854,4.604,5.007,all P <0.05).50 cases of pathologically verified as lung cancer patients with hilar lymph node metastasis in the control group showed diagnostic sensitivity of 60%,specificity of 72%,accuracy of 70%;while diag-nosed hilar lymph node metastasis in the observation group showed sensitivity of 76%,specificity of 84 percent and accuracy rate of 84%.The differences between the two groups were statistically signficant(χ2 =5.882,4.196,5.534, all P <0.05).50 cases of pathologically verified as lung cancer patients with mediastinal lymph node metastasis in the control group,showed diagnostic sensitivity of 62%,specificity of 57% and accuracy of 60%;in observation group the sensitivity was 72%,specificity was73% and accuracy was 72%.The differences between the two groups were statisti-cally signficant(χ2 =4.342,5.626,4.583,all P <0.05).Conclusion The spiral CT for diagnosis of lung lesions positioning has good effect,and can be widely used in the diagnosis of lung lesions.