摘要
目的探讨降低婴幼儿胸部DR管电压和调整胸部来优化婴幼儿胸部DR图像质量和辐射剂量的可行性。方法纳入0～3岁婴幼儿400例,分成0～、1～3岁两个年龄段,再按年龄段随机分为优化组和对照组进行DR摄影。辐射剂量用剂量面积乘积(DAP)计算。统计分析采用SPSS 17.0软件,两组间均数比较采用t检验,DR图象质量比较采用秩和检验。结果最初共纳入400例婴幼儿,在排除9例不符合纳入标准者后,最终纳入391例婴幼儿胸部正位图像进行分析,其中优化组196例(0～岁91例、1～3岁105例),对照组195例(0～岁103例、1～3岁92例)。结果显示:两组0～岁、1～3岁和总体DAP值差异均有统计学意义(P值均<0.05),优化组DAP值较对照组平均降低21.6%;秩和检验结果显示两组主观评价图像质量差异有统计学意义(P=0.000),优化组比对照组多获得优质图像43.9%。结论降低婴幼儿胸部DR管电压和调整胸部尽可能小的照射野不但能降低婴幼儿辐射剂量且能改善图像质量。
Objective To optimize image quality and radiation dose of infant chest digital radiography and to explore feasibility of reducing tube voltage and adjusting according to infant chest area.Methods 0 to 3-year-old infants were randomly divided into two average groups of 0-and 1-3 year-old,and then each age group was randomly assigned to optimization and control groups in digital radiography.Measurement of radiation dose used dose area product（DAP）.Mean DAP between groups was compared by using t test,and the image quality of optimization was compared by rank sum test.Results A total of 400 cases of 0 to 3-year-old infants were identified,and finally 391 cases of infants anteroposterior chest image were included,including 196 cases in the optimization group（0-years： n=91;1-3 years： n=105） and 195 cases in the control group（0-years： n=103;1-3 years： n=92）.The results showed： there were significant differences in the mean DAP in 0-years,1-3 years and total infants between the optimization group and the control group（all P value0.05）.The DAP of the optimization group was lower,and reduction of DAP was approximately 21.6% compared to the control subject.The Wilcoxon signed-rank test showed the difference of subjective evaluation of image quality was significantly different（P=0.000）.High-quality image of the optimization group increased approximately 43.9% more than control subject.Conclusion Reducing tube voltage and adjusting according to infants chest area can not only reduce the radiation dose but also improve image quality in digital radiography.
出处
《中国循证医学杂志》
CSCD
2011年第10期1129-1132,共4页
Chinese Journal of Evidence-based Medicine
基金
新疆医科大学第一附属医院循证医学基金(编号:2007-X2-02)
