孤立性肺结节低剂量螺旋CT鉴别诊断42例分析

Differential diagnosis of solitary pulmonary nodules with low-dose spiral CT in 42 cases

目的:探讨低剂量螺旋CT对孤立性肺结节良恶性病变的鉴别诊断价值。方法:对常规剂量(255mA)螺旋CT发现有孤立性肺结节的42例患者,再行一次低剂量(70mA)螺旋CT扫描,比较两种剂量螺旋CT扫描孤立性肺结节在形态学特征、定性诊断方面是否有差异。结果:低剂量组在孤立性肺结节的形态学特征、定性诊断方面与常规剂量组比较,差异无统计学意义(P>0.05)。结论:低剂量螺旋CT扫描和常规剂量螺旋CT扫描对孤立性肺结节良恶性病变的鉴别诊断无差异,而低剂量螺旋CT扫描具有明显减少X射线辐射量的优势,对于青少年、孕妇、免疫力低下患者等X射线敏感人群更有其特殊的意义。

Objective：To investigate the value of low-dose CT in the differential diagnosis of benign and malignant lesions of solitary pulmonary nodules.Methods：42patients with solitary pulmonary nodules were found with conventional dose（255mA）spiral CT,and a low-dose（70mA）spiral CT scan was performed again,and the differences were compared between the two kinds dose of spiral CT scanning solitary pulmonary nodules in the morphological characteristics and qualitative diagnosis.Results：The morphological characteristics and qualitative diagnosis of solitary pulmonary nodules in low-dose group were compared with that of conventional dose group,and the difference was not statistically significant（P〉0.05）.Conclusion：The differential diagnosis of benign and malignant lesions of solitary pulmonary nodules is not different from low-dose spiral CT scanning and conventional dose spiral CT scanning,and low-dose spiral CT scanning has obvious advantages in reducing the radiation dose of X-ray,and For X-ray sensitive people such as young people,pregnant women,patients with low immunity have special significance.