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目的分析数字胸片筛查肺癌的限度,评价其临床应用价值。方法选择肺癌高危人群(大于等于50岁,吸烟史大于等于20a)387例行数字胸片及低剂量多层螺旋CT(MSCT)全肺薄层扫描检查,分析数字胸片检出中央型和周围型肺癌的敏感性、特异性,并对数字胸片漏诊病例进行分析。结果数字胸片正确诊断2例周围型肺癌和1例中央型肺癌,敏感性分别为33.3%、20.0%,特异性分别为99.2%、99.2%;1例周围型肺癌和3例中央型肺癌未被检出;数字胸片对早期肺癌征象检出率低,有3例周围型肺癌被误认为良性病变。结论除结构重叠外,图像处理也影响数字胸片筛查肺癌的检出率,细致的图像后处理可以提高其应用价值。
Objective To analyze the limits of digital chest radiography in screening lung cancer and evaluate its clinical value. Methods 387 routine digital chest radiographs and low-dose multi-slice spiral CT (MSCT) thin-section lung scan were performed to detect the central type and surroundings of digital chest radiography in patients at high risk of lung cancer (50 years of age or older, smoking history greater than or equal to 20 years) Type of lung cancer sensitivity, specificity, and missed cases of digital chest analysis. Results The digital chest radiography was correct in diagnosing 2 cases of peripheral lung cancer and 1 case of central lung cancer with the sensitivity of 33.3% and 20.0%, and the specificity of 99.2% and 99.2% respectively. One case of peripheral lung cancer and 3 cases of central lung cancer Was detected; digital chest radiography signs of early detection of low lung cancer, 3 cases of peripheral lung cancer was mistaken for benign lesions. Conclusion In addition to structural overlap, the image processing also affects the detection rate of digital chest radiography for lung cancer. Detailed image post-processing can improve its application value.