低剂量对比剂在256层CT头颈血管成像中的应用

发布时间：2018-02-27 10:55

本文关键词： 头部颈脑血管造影术血管造影术体层摄影术螺旋计算机造影剂　出处：《中国医学影像学杂志》2017年02期 　论文类型：期刊论文

【摘要】：目的探讨低剂量(30 ml)对比剂在256层CT头颈部血管成像(CTA)中的可行性,在减少静脉对比剂聚集的同时保证动脉足够强化。资料与方法前瞻性选取头颈部CTA的患者60例,随机分为A、B组。两组扫描参数相同,对比剂注射方案不同。其中A组对比剂总量为60 ml,注射流速为4.0 ml/s,随后以相同速度注射30 ml生理盐水;B组对比剂总量为30 ml,注射流速5.0 ml/s,随后以相同速度注射50 ml生理盐水。分别测量两组图像颈动脉、上腔静脉、头臂静脉、锁骨下静脉及颈静脉的CT值,并对图像质量进行分析。结果 A、B两组上腔静脉、右头臂静脉及右锁骨下静脉CT值比较,差异有统计学意义(P0.05)。A、B两组左头臂静脉、左锁骨下静脉、左右颈内静脉CT值比较,差异无统计学意义(P0.05)。A、B两组主动脉弓、左右颈总动脉、左右锁骨下动脉及左右大脑中动脉CT值比较,差异有统计学意义(P0.05)。A、B两组图像质量评分比较,差异有统计学意义(P0.05)。结论在头颈部CTA检查中采用30 ml低剂量对比剂图像质量能够满足临床诊断需要,降低了对比剂的用量,并减少上腔静脉、右头臂静脉及右锁骨下静脉的对比剂聚集,减少硬化伪影,同时不影响动脉强化。
[Abstract]:Objective to investigate the feasibility of low dose of 30 ml contrast medium in 256-slice CT angiography of head and neck, and to ensure sufficient arterial enhancement while reducing the concentration of intravenous contrast agent. Materials and methods 60 patients with head and neck CTA were prospectively selected. They were randomly divided into two groups: group A and group B. the scanning parameters of the two groups were the same. The total amount of contrast agent in group A was 60 ml, and the flow rate was 4.0 ml / s, then 30 ml of saline was injected at the same speed, 5.0 ml / s was injected into group B, and 50 ml / s was injected at the same speed. Ml of normal saline. The carotid artery was measured in two groups. The CT value of superior vena cava, cephalic vein, subclavian vein and jugular vein were analyzed. Results the CT values of superior vena cava, right head brachial vein and right subclavian vein were compared between the two groups. There was no significant difference in CT values of left cephalobrachial vein, left subclavian vein and left internal jugular vein between the two groups. There was no significant difference in the aortic arch and common carotid artery between the two groups. The difference of CT value between left and right subclavian artery and left and right middle cerebral artery was statistically significant. Conclusion the image quality of 30 ml low dose contrast agent in head and neck CTA can meet the need of clinical diagnosis, reduce the dosage of contrast agent, and reduce the superior vena cava. Contractile concentration of right brachial vein and right subclavian vein reduces sclerosing artifacts and does not affect arterial enhancement.
【作者单位】：广东省人民医院(广东省医学科学院)放射科;
【分类号】：R816.1

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