个体化对比剂方案肾动脉CTA检查图像质量评价

发布时间：2018-05-18 14:48

本文选题：肾动脉 + CT血管造影　；参考：《中国医学计算机成像杂志》2017年05期

【摘要】：目的:探讨低对比剂剂量、个体化给药方案肾动脉CTA的图像质量和临床效果。方法:因高血压行肾动脉CTA者109例。对比剂总量为250mgI/kg,15s内注射完毕,注射速率根据总量计算。自动触发扫描,管电压120kVp。由一名技师和一名医师分别对肾动脉血管重建图像进行主观评分。根据受检者BMI大小分为三组(25,25~28,28),比较三组间动脉CT增强值、血管重建图像主观评分的差异。结果:本组病例肾动脉CTA对比剂平均用量为50ml±10ml,肾动脉平均增强值为259±47HU,主观评分78.9%的图像为优、21.1%的图像为良。不同BMI三组间肾动脉平均增强值没有显著性差异(P0.05)、主观评分没有显著性差异(P0.05)。结论:采用个体化的对比剂注射方案进行肾动脉CTA检查,在降低平均对比剂用量的基础上能够获得良好的增强效果及血管重建图像,满足临床诊断需要;不同BMI的受检者之间肾动脉增强效果和图像质量均没有明显差异。
[Abstract]:Objective: to investigate the image quality and clinical effect of renal artery CTA with low contrast dose and individualized administration. Methods: 109 cases of renal artery CTA were performed because of hypertension. The total amount of contrast agent was 250 mg / kg ~ (-1) / kg ~ (-1) in 15 s, and the injection rate was calculated according to the total amount. Automatic trigger scan, tube voltage 120kVp. A technician and a physician scored the renal artery reconstruction images respectively. According to the size of BMI, the patients were divided into three groups. Results: the average dose of CTA was 50ml 卤10 ml, the average enhancement value of renal artery was 259 卤47 HU.The subjective score of 78.9% was good. There was no significant difference in the mean enhancement value of renal artery between different BMI groups (P 0.05) and no significant difference in subjective score (P 0.05). Conclusion: the CTA examination of renal artery by individualized contrast medium injection can obtain good enhancement effect and vascular reconstruction image on the basis of reducing the average dosage of contrast agent and meet the need of clinical diagnosis. There was no significant difference in enhancement effect and image quality of renal artery between different BMI subjects.
【作者单位】：上海交通大学医学院附属瑞金医院放射科;
【分类号】：R692;R816.7

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