| 杜煜,时高峰,王亚宁.探讨双源CT颈动脉造影低管电压扫描的可行性[J].中国医学影像技术,2012,28(11):2079~2082 |
| 探讨双源CT颈动脉造影低管电压扫描的可行性 |
| Feasibility of dual-source CT in carotid angiography with low tube voltage |
| 投稿时间：2012-05-17 修订日期：2012-07-02 |
| DOI： |
| 中文关键词: 颈动脉 血管造影术 体层摄影术,X线计算机 |
| 英文关键词:Carotid arteries Angiography Tomography, X-ray computed |
| 基金项目:河北省2010年医学科学研究重点课题(20100115)。 |
|
| 摘要点击次数: 2301 |
| 全文下载次数: 966 |
| 中文摘要: |
| 目的 评价低管电压双源CT扫描应用于颈部血管造影的可行性。方法 选取35例可疑头颈动脉粥样硬化患者行头颈部DSCTA扫描。扫描完成后取得3组数据,其中融合图像重建函数为反投影滤过重建算法(D26),80-kVp数据重建函数分别为D26和迭代重建算法(I26)。于颈动脉分叉区及胸廓入口区测定颈动脉血管的噪声、SNR和对比噪声比(CNR),并进行动脉影像质量评级评分。结果 80-kVp(I26)重建图像与融合图像的噪声差异无统计学意义(P＞0.05),80-kVp(D26)重建图像的噪声高于融合图像和80-kVp(I26)重建图像(P均＜0.05)。80-kVp(I26)和80-kVp(D26)重建图像的CT值均高于融合图像(P均＜0.05)。80-kVp(D26)重建图像与融合图像的SNR和CNR差异无统计学意义(P均＞0.05),80-kVp(I26)重建图像的SNR和CNR高于80-kVp(D26)重建图像和融合图像(P均＜0.05)。80-kVp(I26)重建图像、融合图像的图像质量均为优,满足诊断率达100%;80-kVp(D26)重建图像的图像质量及满足诊断率低于80-kVp(I26)重建图像和融合图像(P均＜0.05)。结论 DSCT低管电压扫描观察颈动脉病变是可行的,所得图像可满足诊断要求。 |
| 英文摘要: |
| Objective To explore the feasibility of dual-source CT in the examination of the carotid artery with low tube voltage. Methods Thirty-five patients with suspected cerebral and cervical arteriosclerosis underwent contrast-enhanced carotid angiography dual-source CT. Fused image were reconstructed with reconstructed with filter back projection (D26), 80-kVp data set were reconstructed with D26 and iterative reconstruction (I26). CT attenuation, SNR and contrast-to-noise ratio (CNR) of the aortic arch and bifurcation of carotid artery were measured in each group. The image quality was evaluated in the three groups. Results There was no statistical difference between noise of 80-kVp (I26) images and fused image (P＞0.05), while noise of 80-kVp (D26) images was higher than that of 80-kVp (I26) and fused image (both P＜0.05). CT value of 80-kVp (I26) and 80-kVp (D26) images were higher than that of fused images (P＜0.05). SNR and CNR of 80-kVp (D26) images had no statistical difference with that of fused image (all P＞0.05), while SNR and CNR of 80-kVp (I26) were higher than that of 80-kVp (D26) and fused images (all P＜0.05). The image quality of 80-kVp (I26) images and fused images was good, and the satisfactory diagnosis rate was 100%, while quality and satisfactory diagnosis rate of 80-kVp (D26) images were lower than those of 80-kVp (I26) images and fused images (both P＜0.05). Conclusion DSCT scan with low tube voltage is feasible for carotid artery diseases, and the images are satisfactory for diagnosis. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
