16排螺旋CT胸部低剂量扫描在肺结核诊断中的应用分析

Application of 16 row spiral CT chest low dose scanning in the diagnosis of pulmonary tuberculosis

目的探讨16排螺旋CT胸部低剂量扫描在肺结核诊断中的临床应用价值.方法选择余姚市人民医院2014年6月13日至2017年6月20日诊治的肺结核患者80例为研究对象.分别采用16排螺旋CT胸部常规剂量(对照组,n=40)及低剂量(观察组,n=40)扫描.观察两种方法诊断准确性、辐射剂量、淋巴结或血管间隙显示情况及图像特征表现.结果两种方法诊断准确率差异无统计学意义(P>0.05);观察组剂量长度乘积、CT剂量指数分别为(32.98±2.57)mGycm、(44.29±3.47),均低于对照组的(127.66±5.03)mGycm、(44.29±3.47)(t=106.01、21.05,均P<0.05);观察组淋巴结或血管间隙显示清晰率为90.00%,对照组为92.50%,差异无统计学意义(P>0.05);观察组磨玻璃影、毛刺率分别为29.32%、31.58%,低于对照组的41.35%、47.37%,差异均有统计学意义(χ2=4.21、6.94,均P<0.05);两组其他征象检出率差异均无统计学意义(均P>0.05).结论16排螺旋CT胸部低剂量扫描应用于肺结核诊断中,临床价值较高,具有辐射剂量低、诊断准确性高等优势.

Objective To evaluate the clinical value of 16-slice spiral CT low dose chest scanning in the diagnosis of pulmonary tuberculosis.Methods From June 13,2014 to June 20,2017,80 patients with pulmonary tuberculosis in Yuyao Peoples Hospital were selected in the study.The conventional chest dose(control group)and low close(observation group)of 16-slice spiral CT were used.The diagnostic accuracy,radiation dose of the two methods,lymph node or vascular space display and image features were observed.Results The diagnostic accuracy of the two methods had no statistically significant difference(P>0.05).The dose product length,the CT dose index in the observation group were(32.98±2.57)mGycm,(44.29±3.47),respectively,which were significantly lower than those in the control group[(127.66±5.03)mGycm,(44.29±3.47)](t=106.01,21.05,all P<0.05).The display clarity of lymph no des or vascular space of the observation group was 90.00%,which of the control group was 92.50%,there was no statistically significant difference between the two groups(P>0.05).The rates of ground glass shadow,burr of the observation group were 29.32%,31.58%,respectively,which were significantly lower than those of the control group(41.35%,47.37%),the differences were statistically significant(X^2=4.21,6.94,all P<0.05).Other signs detection probability are similar bet wee n the two groups and had no statistically significant differences(all P>0.05).Conclusion The low dose chest CT scan with 16 rows spiral CT has high clinical value,low radiation dose and high diagnostic acc uracy in the diagnosis of pulmonaiy tuberculosis.