多层螺旋CT低剂量扫描在儿童鼻咽部检查中的临床应用

目的探讨多层螺旋CT低剂量扫描在儿童鼻咽部检查中的应用价值。方法将42例患者随机分为两组各21例，在其他扫描参数不变的情况下，A组用100mA扫描，B组用40mA扫描，比较两组图像质量与受检者的辐射剂量。结果两组图像评分均数比较虽有统计学差异，但B组图像评分均数为3.6105，可满足临床诊疗需要；两组腺样体平均CT值之间无统计学差异，CT值标准偏差之间有统计学差异；与A组比较，B组容积CT剂量指数(CTDIvol)和剂量长度乘积(DLP)约降低了60.00%。结论120kV、40mA低剂量儿童鼻咽部CT检查，既能保证图像质量，又有效降低了辐射剂量。

Multislice spiral CT low-dose scanning in children nasopharyngeal examination in clinical application

Objective Multislice CT low-dose scan studies in children nasopharyngeal check the application and its clinical value. Methods Will be 42 patients were randomly divided into A, B two groups, each group 21 cases, under the condition of invariable in other scan parameters, group A with 100mA were scanned, group B with 40mA scanning, compared two groups of image quality and radiation dose of the client. Results Two sets of image scores mean comparison is statistically significant, but group B image scores mean is 3.6105, can meet the needs of the clinical diagnosis and treatments Two groups of adenoidectomy no statistical difference between the average CT value, CT value was statistically difference between the standard deviation, Group B compared with group A, the CTDIvol volumetric CT dose index（mGy） and dose length product DLP（mGy/cm） reduced about 60.00%. Conclusion 120kV, 40mA low dose children nasopharyngeal CT examination, can guarantee the quality of the image, and effectively reduce the radiation dose.