多排螺旋CT对肺小结节及早期肺癌的诊断价值

Value of Multi Slice Spiral CT in the Diagnosis of Small Pulmonary Nodules and Early Lung Cancer

目的探讨多排螺旋CT对肺小结节及早期肺癌的诊断价值。方法选取本院于2018年5月至2019年5月收治的90例开展低剂量胸部螺旋CT检查的确诊有肺部小结节患者,将最终所得到的CT图像,都经2.50 mm、1.25 mm重建层厚,共获得182组图像,然后按结节直径将其分为3组,即C组(>10 mm)、B组(5~10 mm)与A组(<5 mm),对比并分析各组图像。结果A组当中的2.50 mm、1.25 mm重建层厚的空洞、肺小结节毛刺征比较,差异不明显(P>0.05),但钙化检出结果、分叶征及边界清晰程度对比,差异显著(P<0.05);B、C组2.50 mm、1.25 mm重建层厚的内部密度、肺小结节边缘特征比较,差异不明显(P>0.05)。结论将胸部低剂量螺旋CT应用于确诊或者疑似有肺部小结节患者,其在2.50 mm、1.25 mm重建层厚所对应的设定图像噪声方面基本相同,但2.50 mm重建层厚在具体的辐射剂量上,较1.25 mm明显偏少。

Objective To investigate the diagnostic value of multi-slice spiral CT in small pulmonary nodules and early lung cancer.Methods Ninety patients with pulmonary nodules diagnosed or suspected by low-dose spiral CT from May 2018 to May 2019 were selected.The final CT images were reconstructed by 2.50 mm and 1.25 mm thickness.A total of 182 images were obtained.They were then divided into three groups according to the diameter of the nodules:group C(>10 mm),group B(>5-10 mm)and group A(<5 mm).The results were compared and analyzed.Results There was no significant difference between the 2.50 mm and 1.25 mm reconstruction layer thickness cavities and pulmonary nodule burr signs in group A(P>0.05),but the difference in calcification detection results,lobular signs and boundary clarity were significant(P>0.05);The internal density of 2.50 mm and 1.25 mm reconstruction thickness and the edge characteristics of small lung nodules in groups B and C were not significantly different(P>0.05).Conclusion Lowdose spiral CT is used in patients with confirmed or suspected pulmonary nodules.The noise of reconstructed images corresponding to 2.50 mm and 1.25 mm thickness is basically the same,but the 2.50 mm thickness of reconstructed images is significantly less than that of 1.25 mm in specific radiation dose.