摘要
目的应用256层CT探讨低剂量对比剂在头颈部血管成像中的应用价值。方法 90例头颈部血管成像(CTA)患者分为3组,对比剂采用不同用量:A组60ml、B组50ml、C组40ml;流速4.5ml/s,利用对比剂跟踪技术,阈值为110HU,图像后处理采用VR、MPR、CPR、MIP;测量颈动脉不同水平CT值,观察锁骨下静脉和头臂静脉有无残留对比剂造成的伪影。结果 3组病例颈动脉内对比剂浓度均在250HU以上,无统计学意义,均满足诊断要求;3组病例在锁骨下静脉和头臂静脉残留对比剂的干扰方面存在差异,C组(40ml)图像质量明显优于A、B组。结论 256层头颈部CTA低剂量对比剂的应用更具有可行性,具有良好的临床应用价值。
Objective To investigate the value of low-dose contrast in 256-slice CTA of the head and neck. Methods 90 cases examed by CTA in the head and neck were divided into 3 groups with different contrast a group A 60 m[; group B 50 ml; group C 40 ml~ The rate was 3~4 ml/s, with bolus trigger technique, the threshold was 110 HU, imaging postpro- cessing techniques included VR, MIP, CPR, MPR. CT values of the different level of carotid arteries were measured and the artifact of the remaining contrast in the subclavian vein and brachiocephalic vein were observed. Results The CT val- ues of the contrast in Carotid arteries were all more than 250 HU. There was difference between three groups, all images could meet the diagnostic requirements; the artifact of the remaining contrast in the subclavian vein and brachiocephalic vein had significant difference between three groups, the image quality of groups C was better than group A and group B. Conclusion Application of the low dose contrast in 256 slice CTA of the head and neck was feasible and had an important clinical value.
出处
《医学影像学杂志》
2013年第5期672-674,共3页
Journal of Medical Imaging
关键词
低剂量对比剂
颈动脉造影
体层摄影术
x线计算机
The low-dose contrast
Angiography for the head and neck
Tomography, X-ray computed
