中国医科大学学报2012，Vol.41Issue(2)：158-161,4.
256层CT冠状动脉造影中前瞻性心电门控技术的应用价值
Application Value of Prospective ECG-gated 256-slice CT Coronary Angiography
摘要
Abstract
Objective To explore the application value and limitation of prospective ECG-gated 256-slice CT coronary angiography by comparing image quality and patient radiation dose received by prospective ECG-gated scan with those obtained by retrospective ECG-gated scan. Methods A total of 193 cases were collected in this study. 90 cases accepted prospective ECG-gated 256-slice CT coronary angiography (group A) and 103 cases accepted retrospective ECG-gated scan as a contrast group (group B). The CT dose index of volume,length of scan field were recorded immediately after scan and the dose length product and effective radiation dose (ED) were calculated. Post processing methods included volume rendering,curved planar reconstruction and multiplanar reconstruction. Each coronary segment was scored according to the post-processed image quality. Results The mean ED in group A with an average heart rate of 69 bpm was (4.11 ±1.36) mSv and that in group B with an average heart rate of 78 bpm (12.10±5.62) mSv. The evaluable rate in group A was 94.1% and that in group B was 93.6%. There was statistically significant difference in the mean ED (P < 0.05), but there was no statistical difference in the e-valuable rate (P > 0.05) between group A and group B. Conclusion Prospective ECG-gated 256-slice CT coronary angiography could keep satisfactory image quality and reduce radiation dose. It should be used in clinic at the most if the heart rate adaptive.关键词
X线计算机体层摄影术/冠状血管造影术/辐射剂量Key words
X-ray computed tomography/ coronary angiography/ radiation dosage分类
医药卫生引用本文复制引用
李佩玲,李菁菁,谢秀丽,徐克..256层CT冠状动脉造影中前瞻性心电门控技术的应用价值[J].中国医科大学学报,2012,41(2):158-161,4.基金项目
辽宁省教育厅高校科研计划(20060971) （20060971）
