目的 探讨CT诊断胸部弥漫性疾 病的临床应用价值。方法 选取2011年6 月-2014年7月入院就诊的115例确诊胸部 弥漫性疾病患者为研究对象,均接受胸部 CT和X线检查。对比两种检查方式的图片 质量及阳性率差异，记录不同疾病患者 的胸部CT征象特点。结果 X线片质量优 良率为68.7%，显著低于胸部CT图片的 87.0%(P<0.05)；115例受试者胸部CT检查 结果全部呈阳性，阳性率100.0%，共25例 胸部CT图像可见明显散在斑片状影(其中 间质性肺炎9例，过敏性肺炎1例，肺结节 病7例，放射性肺炎2例，特发性肺间质纤 维化6例)，病灶显示为磨玻璃影35例、结 节影33例、蜂窝影4例、网状影13例、粟 粒样高密度影5例；X线检查结果显示阳性 93例，阳性率为80.9%，两种检查方式的 阳性率对比具有统计学意义(P<0.05)。结 论 胸部CT图像相较于胸部X线片，清晰度 更高，更利于医师观察影像特征、准确判 断疾病类型。

Objective To explore the clinical application value of CT in the diagnosis of diffuse chest diseases. Methods 115 patients diagnosed with diffuse chest diseases who were admitted in the hospital between June 2011 and July 2014 were selected as the study subjects. All patients underwent chest CT and X-ray examination. The image quality and positive rate were compared between the two kinds of examination methods. The chest CT findings of patients with different diseases were recorded. Results The excellent rate of X-ray film quality (68.7%) was significantly lower than that of chest CT images (87.0%) (P<0.05). CT examination results of 115 cases of subjects were all positive and the positive rate was 100.0%. A total of 25 cases of chest CT images were with scattered patchy shadows (including 9 cases with interstitial pneumonia, 1 case with hylactic pneumonitis, 7 cases with pulmonary sarcoidosis, 2 cases with radiation pneumonitis, 6 cases with idiopathic pulmonary fibrosis). Lesions showed ground glass shadow in 35 cases, nodule shadow in 33 cases, honeycombing shadow in 4 cases, reticular shadow in 13 cases and miliary shadow in 5 cases. X-ray examination results showed that 93 cases were positive and the positive rate was 80.9% (P<0.05). Conclusion Compared with chest X-ray film, chest CT images are more distinct, which is more favorable for doctors to observe the image features, and accurately determine the type of disease.