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目的 通过对新疆和田地区墨玉县小儿泌尿系结石CT扫描辐射剂量的研究,来探讨低剂量扫描的可行性.方法 回顾遴选80例小儿泌尿系结石患者的图像、标识和辐射剂量记录,20例设为高剂量组,120 kV、350 mAs,其余为低剂量Ⅰ组20例100 kV、350 mAs,Ⅱ组20例100 kV、300 mAs,Ⅲ组100 kV、250 mAs.按自定的标准盲法由诊断医生进行图像质量评估分为优,良,差,其中优,良为满足诊断.结果 高剂量组图像均为优,满足诊断100％.低剂量Ⅰ组Ⅱ组满足诊断率也在100％,与高剂量组对比无统计学意义.Ⅲ组满足诊断率为55％,其构成比X2检验P＜0.05,差异有统计学意义.采用100 kV、350 mAs,100 kV、300 mAs、100 kV、250 mAs的CTDIvol分13.75、11.78、9.85mGy,是高剂量组CTDIvol的60.20％、51.58％、43.13％.结论 只需要高辐射剂量一半左右(51.58％)的小儿泌尿系结石CT低剂量扫描就可满足诊断,在墨玉地区值得推广这种低剂量扫描.“,”Objective To study the feasibility of low dose scanning by studying the CT scan radiation dose of pediatric urinary calculi in Muyu County,Xinjiang Hotan.Methods The images,markers and radiation dose records of 80 children with urinary calculi were retrospectively analyzed.Twenty patients were treated with high dose group (120 kV and 350mAs),and the rest were the low dose,group Ⅰ (20 cases) 100 kV、350 mAs,group Ⅱ (20 cases) 100 kV、300 mAs,Group Ⅲ 100 kV,250 mAs.According to a custom standard blindness by the diagnostic physician image quality assessment,excellent、good、poor,excellent and good meet the diagnosis.Results The high dose group images were excellent and the diagnosis was 100％.Low-dose group Ⅰ group Ⅱ which meet the diagnostic rate is also 100％,compared with the high group was not statistically significant.Group Ⅲ which meets the diagnostic rate of 55％ of its composition than x2 text P ＜ 0.05.The difference was statistically significant.The CTDIvol points of 100 kV,350 mAs,100 kV,300 mAs,100 kV and 250 mAs are 13.75,11.78 and 5.98 mGy,which are 60.20％,51.58％ and 43.13％ of high dose CTDIvol.Conclusion Only a low dose of 13％ of the high radiation dose (51.58％) of the pediatric urinary stone CT can meet the diagnosis of low dose in the Muyu area worthy of promotion of this low dose scanning.