心率和扫描时相与320排CT冠脉CTA辐射剂量的相关性研究  

Correlation of Heart Rates and Scanning Span with Scanning Doses in Coronary CT Angiography

作　　者：李建浩[1,2] 杜飞舟[2] 赵立强[1] 

机构地区：[1]四川大学华西公共卫生学院,成都610041 [2]中国人民解放军成都军区总医院医学影像科

出　　处：《西南军医》2014年第3期241-243,共3页Journal of Military Surgeon in Southwest China

摘　　要：目的比较不同心率及不同扫描方案下冠脉CT血管造影辐射剂量的差异,明确降低心率以及缩短扫描时相的价值及必要性。方法 240例行CCTA检查的患者根据心率及扫描时相不同分为4组进行扫描,4分法评价图像质量,并计算辐射剂量,评价图像质量和辐射剂量与心率和扫描时相的相关性。结果各组间图像质量无显著差异。随着心率减慢,辐射剂量显著降低。舒张末期扫描组辐射剂量显著低于全心动周期扫描组。结论降低心率、缩短扫描时相在冠心病CCTA检查中减少辐射剂量具有重要意义。Objective To investigate the relation of heart rates and scanning span with scanning doses in Coronary Computerized Tomography Angiography. Methods 240 patients undergoing CCTA were divided into 4 groups according to the heart rates and scanning span; effective doses（ ED）were recorded and four point scoring method was applied in evaluating the image quality. Results No difference in image quality was found among the groups; radiation reduced significantly as the heart rates slowed down; effective doses in patients undergoing diastasis scanning were significantly lower than those in patients undergoing whole cardiac cycle scanning. Conclusions The scanning does in CCTA can be effectively decreased by reducing heart rates and shortening scanning span.

关 键 词：320排CT 冠状动脉 心率 剂量 

分 类 号：R541.4[医药卫生—心血管疾病]