| 仲海,徐卓东,柳澄,赵元.64层螺旋CT下肢动脉血管成像的注射速率与重建矩阵的选择[J].中国医学影像技术,2005,21(10):1569~1571 |
| 64层螺旋CT下肢动脉血管成像的注射速率与重建矩阵的选择 |
| The optimal injection rate and reconstruction matrix study of CT arteriography for lower limb artery by 64-slice CT |
| 投稿时间：2005-04-29 修订日期：2005-08-19 |
| DOI： |
| 中文关键词: 血管造影术 体层摄影术,X线计算机 参数 下肢动脉疾病 |
| 英文关键词:Angiography Tomography, X-ray computed Parameters Lower extremity arterial disease |
| 基金项目: |
|
| 摘要点击次数: 3144 |
| 全文下载次数: 895 |
| 中文摘要: |
| 目的 探讨64层螺旋CT下肢动脉血管成像的最佳注射速率与重建矩阵的选择。方法 将40例临床疑有下肢动脉疾病的患者随机等分为两组,采用Siemens Cardiac 64层螺旋CT行CT血管成像检查。确定增强扫描范围、最佳注射速率与重建矩阵。对比剂注射速率一组为3.0 ml/s,另一组为4.0 ml/s。将获得的图像传入Wizard工作站进行MIP、VR、SSD、VE等后处理,比较两组原始图像及后处理图像质量。24例有DSA对照。每一病人做两次血管成像,一组一次全部成像,另一组为分三段成像。结果 注射速率为4.0 ml/s血管增强效果及重建图像质量要明显优于注射速率为3.0 ml/s者。分段重建显示血管明显优于一次成像。结论 正确的注射速率和重建方法选择是提高螺旋CT下肢动脉血管成像质量的关键。 |
| 英文摘要: |
| Objective To investigate the optimal injection rate and reconstruction matrix in 64-slice spiral CT lower extremity artery angiography. Methods Forty patients with suspected peripheral arterial diseases underwent CT angiography (CTA) with Siemens Cardiac 64-slice spiral CT. The patients were divided into two groups randomly. The scan cover, injection rate and reconstruction matrix were assured. On one group contrast media was injected at a rate of 3.0 ml/s, and on the other group, the rate was 4.0 ml/s. Wizard workstation was used for further three-dimensional reconstruction, such as MIP, VR, SSD, VE, and compared the axial images with post-processing images. Conventional digital subtraction angiography (DSA) was performed as a standard reference in 24 patients. The images of patients which rate was 4.0 ml/s were reconstructed twice. On one group all images were loaded in the workstation, and the other group the images were divides into three subgroups, then were loaded in the workstation in turn for reconstruction. Results The lower limb arterial enhancement effect and the quality of reconstruction images were better in the group which using injection rate 4.0 ml/s than the group of 3.0 ml/s. The CTA image quality of the group whose axial images were divided into three subgroups for reconstruction was clearer than the other. Conclusion The optimized injection rate and reconstruction matrix parameters of lower limb CT angiography could improve image quality. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
