饮水联合低剂量扫描对MDCTU显示尿路的影响

发布时间：2018-01-28 23:04

本文关键词： CT尿路造影饮水低剂量　出处：《临床放射学杂志》2015年09期 　论文类型：期刊论文

【摘要】：目的探讨饮水联合低管电流扫描技术对CT尿路造影(CTU)显示尿路的影响。方法 120例患者按照检查顺序随机分为常规管电流饮水组(A组)、常规管电流不饮水组(B组)、低管电流饮水组(C组)和低管电流不饮水组(D组),A、C组扫描前40 min饮水10 ml/kg体重。在CTU分泌期图像上将尿路分为4段:肾内集合系统S1、近段S2(输尿管起始部至腰大肌跨越处)、中段S3(从腰大肌跨越处至髂血管处)、远段S4(从髂血管处到膀胱),分别比较四组各段尿路腔内平均CT值、各段尿路充盈情况评分、图像质量评分和辐射剂量的差异。结果四组各段尿路结构CT值差异均无统计学意义(P0.05);A组与B组各段充盈评分差异均有统计学意义(P0.05),C组与D组各段充盈评分差异均有统计学意义(P0.05),饮水组尿路充盈情况评分高于不饮水组(P0.05);四组各段尿路图像质量评分之间差异无统计学意义(P0.05);低管电流与常规管电流组间CT剂量指数(CTDIvol)、剂量长度乘积(DLP)和有效剂量(ED)差异均有统计学意义,其中低管电流组较常规管电流组ED降低33.92%。结论饮水后CTU低管电流技术可在降低辐射剂量,有效改善尿路充盈情况的同时满足诊断要求。
[Abstract]:Objective to investigate the effect of drinking water combined with low-tube current scanning technique on the display of urinary tract by CT urography. Methods 120 patients were randomly divided into two groups according to the order of examination. Group B, Group C, Group C, Group B, Group D, Group D, Group D, Group D (Group C) and Group D (Group D) with no drinking current (Group B) and Group C (Group C). In group C, the urinary tract was divided into four segments on the images of the secretory phase of CTU: S1, the intrarenal collection system, 40 min before scanning. Proximal S2 (from the beginning of the ureter to the crossing of the psoas major muscle, S3 from the major psoas muscle to the iliac vessels, and S4 from the iliac vessels to the bladder). The mean CT value of each segment of urinary tract and the filling score of each segment of urinary tract were compared among the four groups. Results there was no significant difference in CT value of urinary tract structure between the four groups (P 0.05). There were statistically significant differences in filling scores between group A and group B (P 0.05). There were significant differences in filling scores between group C and group D (P 0.05). The score of urinary tract filling in drinking water group was higher than that in non-drinking water group (P 0.05). There was no significant difference in the quality of urinary tract images between the four groups (P 0.05). There were significant differences in CT dose index (CTDIvoll), dose length product (DLP) and effective dose (EDD) between the low tube current group and the conventional tube current group. The Ed of low tube current group was 33.92 lower than that of conventional tube current group. Conclusion CTU low tube current technology after drinking water can reduce the radiation dose and effectively improve the filling condition of urinary tract at the same time to meet the diagnostic requirements.
【作者单位】：武汉大学人民医院放射科;黄石市中心医院放射科;
【分类号】：R816.7
【正文快照】： CT尿路造影(CTU)检查中输尿管蠕动和对比剂充盈不佳导致输尿管全程显影率低,特别是中下段输尿管难以充分显示[1]。为了更好地评价泌尿系集合系统,尿路合适的充盈程度必不可少,文献已经报道了腹部加压、俯卧位扫描、静脉注入生理盐水、饮水等多种改善尿路充盈效果的技术[2]。

【参考文献】