16层螺旋CT低剂量扫描对胸部病变检出率的研究

摘要

目的：对比观察16层螺旋CT低剂量扫描肺部体检与常规胸片胸部体检对病变的检出率。方法选取200例拟行肺部体检的体检者列为研究对象。将其分为两组，试验组选择16层螺旋CT为体检方式，对照组选择胸部X线片体检方式。分别统计计算试验组和对照组的肺部疾病检出率、受检者的剂量长度乘积（ DLP）和容积剂量指数（ CT-DIvol）以及敏感度和特异度。结果试验组肺炎、肺结核、支气管扩张、肺部肿瘤其它胸部病变的检出率高于对照组（ P﹤0.05），而肺大泡、肺气肿在两组中检出率无显著差异（ P ﹥0.05）；试验组的DLP和CTDIVOL值均远远小于对照组（ P ﹤0.05）；试验组的敏感度和特异度的值均高于对照组（ P ﹤0.05）。结论16层螺旋CT低剂量薄层肺部体检对肺部疾病的病变检出率高于常规胸片胸部体检。%Objective To compare and observe the detection rate of low-dose 16 slice spiral CT scan and conventional chest X-ray ex-amination on chest diseases. Methods A total of 200 patients scheduled for lung examination were divided into two groups,experimental group received 16 multislice spiral CT examination,control group received chest X-ray examination. The detection rate of lung diseases,dose length product( DLP),dose volume index( CTDIvol)and the sensitivity and specificity of the two examination methods were compared. Results The detection rates of pneumonia,tuberculosis,bronchiectasis,lung cancer and other chest diseases in experimental group were higher than the control group( P ﹤0. 05),while no significant difference in the detection of pneumatocele and emphysema between two groups( P ﹥0. 05);DLP and CTDIvol values were much lower in experimental group than those in control group( P ﹤0. 05);the sensitivity and specificity were higher than those in the control group( P ﹤0. 05). Conclusion Low-dose16 slice spiral CT examination has higher detection rate than conventional X-ray chest examination on detecting lung diseases.