摘要目的 探讨不同低剂量螺旋CT检查泌尿系统结石的可行性.方法 选取2011年8月至2014年4月行CT尿路造影(CTU)检查的泌尿系统疾病患者51例,其中25例行标准剂量扫描,26例根据BMI指数分别l采取50、80、120 mA低剂量扫描,比较两组剂量长度乘积(DLP)、CT容积剂量指数(CTDlvol),比较两种方式在输尿管各段及肾脏集合系统的检测差别.结果 对照组、高体质量组与中体质量组DLP呈递减趋势,中体质量组最低,CTDlvol值与上述趋势相同,组间比较差异均有统计学意义(P＜0.05).各组上尿路不同部位显示效果无明显差别.结论 根据BMI指数采取降低管电流的CTU可使辐射剂量降低,在上尿路结构检查有较高的应用价值.

abstractsObjective To investigate the feasibility of different low dose spiral CT examination of urinary system calculus.Methods From August 2011 to April 2014,Fifty-one patients with urinary system diseases underwent CTU examination were selected,25 cases of whom took standard dose scans and 26 cases taken low dose scanning of 50,80,120 mA according to the BMI index,compared of dose length product (DLP),CT volume dose index (CTDlvol),comparison of two groups in ureter paragraphs and kidney detection of difference system.Results DLP decreased in sequence in control group,high weight group and middle weight group,and so did CTDl-vol.The differences among groups were significant (P ＜ 0.05).Different parts of each group of upper urinary tract showed no significant difference.Conclusious Reducing the tube current of CTU according to patient specific BMI index can make the radiation dose reduction,and has higher application value in the upper urinary tract structure checkin.