目的探讨低剂量电子计算机断 层扫描(CT)在诊断早期肺癌中的应用。 方法 选取2016年2月-2017年6月在我院 健康体检中心检查发现肺癌后经肿瘤内 科确诊为早期肺癌患者共100例，将采 用常规剂量CT扫描的48例患者纳入对照 组，采用低剂量CT扫描的52例患者纳入 观察组，比较两组患者图像质量和结节 检出情况。结果 观察组和对照组图像 质量比较，无统计学意义(P＞0.05)。 对照组剂量长度(DLP)、有效放射剂量 (ED)分值高于观察组，有统计学意义(P ＜0.05)。观察组结节平均直径和检出结 节数目高于对照组，差异有统计学意义 (P＜0.05)。结论 低剂量CT在能够保证 图像质量的情况下，不影响早期肺癌的 检出率，并减小受检者的辐射损伤。

Objective To explore the application of low dose computed tomography (CT) in the diagnosis of early lung cancer. Methods During the period from February 2016 to June 2017, 100 cases of lung cancer were found in the medical examination center of our hospital and suspected of lung cancer, and then diagnosed as early lung cancer by the oncology department. A total of 48 cases healthy examiner treated with routine dose CT scan were enrolled in the control group, and 52 cases treated with low dose CT scan were included in the observation group. The image quality and nodule detection were compared between the two groups. Results There was no significant difference in image quality between the two group (P>0.05). The dose-length product (DLP) and effective radiation dose (ED) in the control group were higher than those in the observation group (P<0.05). The average diameter of nodules and the number of detected nodules in the observation group were significantly higher than those in the control group (P<0.05). Conclusion Low dose CT can ensure the image quality without affecting the detection rate of early lung cancer and reducing the radiation damage of the subjects.