多层螺旋CT低剂量扫描在儿童鼻咽部检查中的临床应用

摘要

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 treatment; 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.%　　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。