分析比较数字与双能量两种减影血管成像（computer tomography angiography, CTA）技术在脑血管成像中图像质量的差异。

回顾性分析我院于2013年1月至2014年2月期间行头颅CTA检查的36例患者的临床资料，根据不同的检查方式分为对照组和观察组，各组18例，对照组行双能量减影CTA技术，观察组行常规数字减影CTA技术，比较两组脑血管成像中图像质量的差异。

观察组的减影成功率为17例（94.44%），对照组减影成功率为18例（100%），两组减影成功率比较差异无统计学意义（P>0.05），但对照组的图像质量低于观察组，两组图像质量比较差异显著（P<0.05）。

随着双源CT技术的发展，双能量减影CTA技术在脑血管成像中图像质量优于数字减影CTA技术，双能量减影CTA技术值得临床推广使用。

To compare the difference of digital analysis and dual energy subtraction CTA technology in two cerebral vascular image in image quality.

Retrospective analysis in January 2013 to February 2014 head CTA examination during the period of the clinical data of 36 patients, according to the different way of checking divided into control group and observation group, each group 18 cases, control group underwent dual energy subtraction CTA technology, the observation group received conventional digital subtraction CTA technology, difference comparison of image quality between two groups of cerebral angiography in.

Observation group the subtraction of the success rate of 17 cases (94.44%), control group success rate of subtraction angiography for 18 cases (100%), and success rate of two groups of subtraction angiography there was no statistical significance (P > 0.05) difference comparing, but the image quality control group were lower than in the observation group, two groups of image quality difference, with P<0.05 for the difference had statistical significance.

With the development of dual source CT technology, dual energy subtraction technique of CTA shadow CTA technology of digital image quality is better than the reduction in cerebral vascular imaging, dual energy subtraction CTA technology is worth popularizing in clinical use.