下肢动脉成像低管电压设置结合个体化对比剂应用的临床研究

发布时间：2018-04-13 13:35

本文选题：体层摄影术 + x线计算机　；参考：《临床放射学杂志》2015年07期

【摘要】：目的探讨联合应用低管电压和对比剂个体化方案降低下肢CT血管成像(CTA)辐射剂量和对比剂用量的可行性。方法连续选取需要进行下肢CTA检查的患者90例,按数字表法随机设计分为3组,每组30例。A组管电压120 k V,B组和C组的管电压均为100 k V。3组对比剂均采用个体化对比剂剂量,采用对比剂总量(S)=Gλ,其中G为患者体质量(kg),λ为对比剂剂量和体质量的比值(ml/kg)。A、B、C组λ值分别为1.1 ml·kg-1、1.1ml·kg-1、1.0 ml·kg-1。采用单因素方差分析比较各组的有效辐射剂量(ED)、对比剂用量和下肢动脉及其分支的图像质量。结果 A、B、C组的ED分别为(19.1±0.4)、(14.3±0.2)和(14.4±0.4)m Sv,对比剂用量分别为(73.0±9.9)、(72.7±8.8)和(66.6±9.4)ml,3组间差异均有统计学意义(F值分别为539.406和2.971,P值分别为0.000和0.039)。与A组相比,B组ED下降25.1%,C组ED和对比剂用量分别下降24.6%和8.8%。A组图像质量评分为优、良好、一般和差的患者分别为12、10、7和l例,B组分别为14、12、4和0例,C组分别为13、12、5和0例,3组间图像质量评分差异无统计学意义(P=0.459)。结论低管电压结合对比剂个体化应用方案可以在不影响图像质量的前提下降低下肢CTA的辐射剂量和对比剂用量。
[Abstract]:Objective To explore the feasibility of the combination of low tube voltage and contrast agent for lower limb CT angiography ( CTA ) radiation dose and contrast agent dosage . Compared with group A , the ED in group B decreased by 25 . 1 % , the dosage of ED and contrast agent in group C decreased by 24 . 6 % and 8 . 8 % , respectively . Group A had excellent , good , general and poor patients , respectively , and group B were 14 , 12 , 4 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C were 13 , 12 , 5 and 0 respectively , group C group had no statistical significance ( P = 0 . 459 ) .

【作者单位】：江苏省苏北人民医院医学影像科;
【分类号】：R816.2

【共引文献】