| 张军,耿道颖,张晓龙,祝瑞江,李浩雄.不同千伏设置对缺血性脑血管病头颈联合CTA图像质量的影响[J].中国医学影像技术,2009,25(3):398~400 |
| 不同千伏设置对缺血性脑血管病头颈联合CTA图像质量的影响 |
| Effect of multi-slice spiral CT angiography at different kilovoltage settings on image quality of head and cervical arteries in ischemic cerebrovascular disease |
| 投稿时间：2008-11-28 修订日期：2008-12-06 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 血管造影术 动脉 |
| 英文关键词:Tomography, X-ray computed Angiography Arteries |
| 基金项目:上海市科委重点科技攻关项目(074119504)。 |
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| 中文摘要: |
| 目的 研究不同千伏设置对缺血性脑血管病头颈联合CTA图像质量的影响。方法 将进行头颈联合CTA检查的70例患者随机分2组。A组35例扫描的千伏设为100 kV;B组35例扫描的千伏设为120 kV。扫描后进行最大密度投影(MIP)及容积再现技术(VR)重建,以九位法来显示动脉的位置。对两组血管图像质量进行评分,并进行统计学分析。结果 A、B两组图像质量评分分别为2.16±0.36和2.83±0.38,差异有统计学意义(P<0.05)。B组的图像质量优于A组的图像质量,颈动脉及椎动脉起始部图像质量得到明显改善。B组的平均辐射剂量高于A组。结论 对缺血性脑血管病患者,高千伏可以获得满意的CTA图像质量。 |
| 英文摘要: |
| Objective To investigate the effect of multi-slice spiral CT angiography at different kilovoltage settings on image quality of head and cervical arteries in ischemic cerebrovascular disease. Methods A total of 70 patients were divided into 2 groups (group A and group B) randomly, and were examined at 100 kV and 120 kV, respectively. The images were reconstructed by maximum intensity projection (MIP) and volume rendering (VR) and displayed by nine-position method. The vascular image quality score was measured and statistical analysis was performed. Results The vascular image quality score in group A and group B were 2.16±0.36 and 2.83±0.38, respectively. Image quality in group B was better than that in group A, especially the initial part of carotid artery and vertebral artery (P<0.05). The CT dose index in group B was higher than that in group A. Conclusion The high kilovoltage settings can supply good image quality of multi-slice spiral CTA for head and cervical arteries in ischemic cerebrovascular diseases. |
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