| 陈文静,刘文亚,王海涛,邢艳,赵园,古丽那,倪瑞玲.心率、扇区重组、时相重建对64层螺旋CT冠状动脉成像质量的影响[J].中国医学影像技术,2008,24(5):785~788 |
| 心率、扇区重组、时相重建对64层螺旋CT冠状动脉成像质量的影响 |
| Evaluation the influence of heart rate, sector scan technique recombination image and reconstruction time for 64-slice CT in coronary artery image |
| 投稿时间：2007-09-13 修订日期：2008-03-12 |
| DOI： |
| 中文关键词: 冠状血管造影术 体层摄影术,X线计算机 图像处理,计算机辅助 |
| 英文关键词:Coronary angiography Tomography, X-ray computed Image processing, computer-assisted |
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| 中文摘要: |
| 目的 探讨心率、重组方法和重建时相窗对64层螺旋CT冠状动脉成像质量的影响。 方法 398例64层螺旋CT冠状动脉造影扫描,根据不同心率应用不同扇区重组、多相位重建,传入后处理工作站进行图像重建。结果 心率在50~70次/分所得冠状动脉图像质量较好,但扫描时心律变化幅度大者成像质量下降。心率＞75次/分,用双扇区和四扇区重组能获得相对高质量的图像。左前降支、回旋支在75％R-R时相重建图像较好,右冠状动脉在45％R-R时相显示较好。 结论 64层螺旋CT冠状动脉成像质量与心率、扇区重组的应用和多相位重建密切相关。 |
| 英文摘要: |
| Objective To investigate the influence of heart rate, recombination image and reconstruction time on image quality of coronary artery using 64-multi slice computed tomography in detecting coronary artery lesions. Methods 64 MSCT coronary angiography were performed in 398 patients. Based on the heart rate, we used the different sector scan technique, recombination image and reconstruction time, and reconstruction the image in the post-processing workstation. Results Image quality was excellent when the heart rate was 50-70 bpm. But if the heart rate changed significantly during the scaning, image quality could decline. When the heart rate was more than 70 bpm, two or four setor recombination image were applied and the superior qulity image could be acquired. The best reconstruction time for left anterior descendy artery (LAD) and left circumflex artery (LCX) were 75% R-R of the cardiac cycle, and that of right coronary artery (RCA) were 45%. Conclusion The image quality of coronary artery is significantly influenced by heart rate, recombination image and reconstruction time of the coronary artery. |
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