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双源CT两种冠状动脉造影扫描方法及辐射剂量对比研究 被引量:3

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摘要 目的优化双源CT冠状动脉成像的扫描方案,降低患者冠状动脉成像的辐射剂量。方法分析268例心率规律且小于70次/min双源CT冠状动脉成像患者病例资料,前瞻性心电门控及回顾性心电门控检查患者各134例,观察两者成像质量,比较两者单次扫描CT容积剂量指数(CTDIvol)及剂量长度乘积(DLP)。结果在扫描范围、对比剂种类速率和注射部位完全相同的情况下,前瞻性心电门控组质量评分(3.71±0.52)分,回顾性心电门控组质量评分(3.78±0.36)分,P>0.05。前瞻性心电门控组和回顾性心电门控组在CTDIvol分别为(14.02±0.02)、(79.50±10.09)mGy;有效辐射剂量分别为(3.38±0.28)、(23.84±4.35)mSv,P均<0.05。结论在心率规律且小于70次/min的患者行前瞻性心电门控冠状动脉成像,可有效地降低患者的辐射剂量,减轻辐射损伤。
出处 《山东医药》 CAS 北大核心 2011年第48期94-95,120,F0003,共4页 Shandong Medical Journal
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