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| 第二代双源CT前门控大螺距冠状动脉成像中ECG"不稳定波形"对图像质量的影响 | |
| 引用本文： | 王小玲,赵青,佟海滨,宋庆桥,薛超,张民,杨树华,王群,汪平,石凤祥,徐磊,方继良. 第二代双源CT前门控大螺距冠状动脉成像中ECG"不稳定波形"对图像质量的影响[J]. 中国医学影像技术, 2011, 27(11): 2335-2339 |
| 作者姓名： | 王小玲 赵青 佟海滨 宋庆桥 薛超 张民 杨树华 王群 汪平 石凤祥 徐磊 方继良 |
| 作者单位： | 1. 中国中医科学院广安门医院放射科,北京,100053 2. 中国中医科学院广安门医院心血管科,北京,100053 3. 首都医科大学附属北京安贞医院影像医学科,北京,100029 |
| 摘 要： | 目的 评估第二代双源CT前门控大螺距冠状动脉成像(Flash模式)中ECG呈现的"不稳定波形"对图像质量的影响。方法 回顾分析Flash模式冠状动脉成像的73例连续病例,与采集数据前ECG波形比较,观察采集数据的单个R-R间期中波形变化。采用4级法评估图像质量。结果 组1(30例)为"不稳定波形"组,组2(43例)为"稳定波形"组。"不稳定波形"发生于数据采集时和(或)数据采集完成后,表现为基线抬高或下移,P波或QRS波群倒置、宽大畸形,T波~P波之间无命名的波形,波形呈M形、W形、V形或∧形,但R-R间期无变化。以血管段及患者为单位,两组间图像质量评分的差异均无统计学意义(P均>0.05);可评估率的差异无统计学意义(P均>0.05)。结论 前门控大螺距冠状动脉成像时,仅在图像采集R-R间期呈现的ECG"不稳定波形"可能为伪差,不对图像质量产生明显影响。 |
| 关 键 词： | 体层摄影术,X线计算机 冠状血管造影术 心电图 图像质量 |
| 收稿时间： | 2011-05-25 |
| 修稿时间： | 2011-07-19 |
Impact of "unstable waves" in ECG during data acquisition on image quality of CT coronary angiography using the second generation dual-source CT with prospectively ECG-triggered and high pitch mode |
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| WANG Xiao-ling,ZHAO Qing,TONG Hai-bin,SONG Qing-qiao,XUE Chao,ZHANG Min,YANG Shu-hu,WANG Qun,WANG Ping,SHI Feng-xiang,XU Lei and FANG Ji-liang. Impact of "unstable waves" in ECG during data acquisition on image quality of CT coronary angiography using the second generation dual-source CT with prospectively ECG-triggered and high pitch mode[J]. Chinese Journal of Medical Imaging Technology, 2011, 27(11): 2335-2339 | |
| Authors: | WANG Xiao-ling ZHAO Qing TONG Hai-bin SONG Qing-qiao XUE Chao ZHANG Min YANG Shu-hu WANG Qun WANG Ping SHI Feng-xiang XU Lei FANG Ji-liang |
| Affiliation: | Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Cardiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China;Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China;Department of Radiology, Guang'an men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China |
| Abstract: | Objective To analyze the characteristics of unstable waves in ECG,and to evaluate the impact of unstable waves on image quality during coronary CT angiography using the prospective ECG-triggered high pitch spiral mode(Flash mode) with the second generation dual source CT(DSCT).Methods Coronary CTA data of DSCT Flash mode in 73 consecutive patients were retrospectively analyzed.The changes of the wave shape in R-R interval were compared with that before the acquisition.Image quality was evaluated and graded ... |
| Keywords: | Tomography, X-ray computed Coronary angiography Electrocardiography Image quality |
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