320层DVCT扇区重建技术对心率波动患者冠脉图像质量的影响  

Influence of segment reconstruction technique on the image quality of coronary artery with 320-slice dynamic volume CT in patients with heart rate fluctuation

作　　者：徐向东[1] 郑力强[1] 蒋超[1] 徐洪刚[1] 陈阿梅[1] 

机构地区：[1]广州市第一人民医院放射科,广州510180

出　　处：《放射学实践》2011年第4期449-452,共4页Radiologic Practice

摘　　要：目的:探讨扇区重建技术对心率波动患者冠脉图像质量的影响,寻找合适的重建方法以提高心率波动患者的冠脉图像质量。方法:39例心率波动患者行320层动态容积CT冠状动脉成像,分别采用半重建法(half)和多扇区重建法选择最佳时相对冠脉图像进行重建,分析两种重建方法下图像质量与扫描时的最低心率以及心率波动范围之间的相关性。结果:采用half重建法,有94.87%的图像可满足诊断,采用多扇区重建法,有87.18%的图像可满足诊断。两种重建方法下图像质量与心率波动范围之间均无相关性;采用half重建时,图像质量与描时的最低心率呈负相关(r=-0.351,P=0.028)。结论:运用320层容积CT进行冠状动脉成像,选择最低心率所对应的单一心动周期进行half重建,可明显提高心率波动患者的冠脉图像质量。Objective：To evaluate the effect of segment reconstruction technique on the image quality of coronary artery in patients with heart rate fluctuation,and to seek the appropriate reconstruction technique,in order to improve the image quality.Methods：Thirty-nine patients with heart rate fluctuation were studied with 320-slice dynamic volume CT（DVCT）,half as well as segment reconstruction technique were used to recombine coronary images on optimal reconstruction phase.Pearson correlation was used to analyze the relationship between image quality and the minimal heart rate as well as heart rate fluctuation during CT scanning with the two reconstruction techniques.Results：Using half reconstruction technique,94.87% of the images fulfilled the quality requirement of diagnosis and 87.18% of images fulfilled the requirement as segment reconstruction was adopted.No correlation between image quality and heart rate fluctuation was showed with these two reconstruction techniques.The minimal heart rate had negative correlation with image quality when using half reconstruction technique（r=-0.351,P=0.028）.Conclusion：To perform CT-CAA with 320-slice DVCT,half reconstruction technique corresponded with the minimal heart rate in a single cardiac cycle can obviously improve the image quality of coronary artery in patients with heart rate fluctuation.

关 键 词：体层摄影术 X线计算机 放射摄影术 图像处理 计算机辅助 冠脉成像 

分 类 号：R816.2[医药卫生—放射医学]