64层螺旋CT前置心电门控冠状动脉成像临床应用初探

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1、64层螺旋CT前置心电门控冠状动脉成像临床应用初探作者：姚金龙，邹国林，刘，斌，包义红,周长青单位：铜陵市人民医院CT室；安徽医科大学第一附属医院CT室(刘斌)铜陵市卫生局科研基金资助项目[卫科研(2007)10]vp＞【摘要】目的比较前置心电门控(前门控)与后置心电门控(后门控)64层螺旋CT冠状动脉(冠脉)成像(64MSCTCA)的图像质鼠及放射剂量，探讨前门控对冠心病的临床应用价值。方法40例随即区分为两组，每组20例，平均心率•—组为(63.75±10.58)次/分、一组为(66±9.4)次/分，分别进行64

2、MSCTCA前、后门控两组技术扫描;采用t检验方法对两种扫描方式的冠脉图像质量及有效放射剂量进行统计分析。结果前与后门控两组冠脉图像质量评分均值分别为(3.50±0.69)分和(3.35±0.75)分,两组间比较差异无统计学意义(P>0.05);前与后门控两组冇效放射剂量均值分别为(2.40±0.02)mSv和(9.97±1.15)mSv,两组间比较差异有统计学意义(P<0.05),前门控低于后门控76.0%o结论在一定的心率(<70次/分)范围内，64层螺旋CT前门控冠

3、脉成像的图像诊断质量与后门控具有一致性，且前门控明显降低了放射剂量。【关键词】冠状动脉成像;体层摄影术，X-线计算机;前置心电门控;后置心电门控;有效放射剂量ThestudyonclinicalapplicationofprospectiveECG-triggeredaxialscanincoronaryangiographyby64-sliceCTYaoJinlong,ZouGuolin,LiuBin,etalDivisionofCT,People'sHospitalofTonglingCity,Tongling244000[Abstract

4、]ObjectiveTocompareimagequalityandradiationdosebetweenprospectiveelectrocardiograph(ECG)-triggeredaxialscanandretrospectiveECG-gatedhelicalscanincoronaryangiographyby64-sliceCT(64MSCTCA),andtoinvestigatetheclinicalvalueofprospectiveelectrocardiogmph(ECG)-triggeredaxialscanus

5、inginthecoronaiyheartdisease.MethodsFortypatientsweredevidedintotwogroupsrandomlyundergoing64-sliceCTA.20patientsweretakenprospectiveECG-triggeredaxialscanandtheortherweretakenretrospectiveECG-gatedhelicalsean.Theheartratewas(63.75±10.58)beatsperminute(bpm)forgroupone

6、and(66±9・14)bpmforgrouptwo,andbothofthemunderwent64MSCTCAbyprospectiveandretrospectiveECG-gatedscan.Theimagequalityofcoronaryangiographyandtheeffectiveradiationdoseoftwogroupswereanalizedbyt-test.ResultsThemeanimagequalityscoreoftheprospectiveandretrospectiveECG-gated

7、groupswere(3.50±0.69)and(3.35±0.75),andtherewasnosignificantstatisticaldifferencebetweenthem(P>0.05)・ThemeaneffectiveradiationdoseofprospectiveretrospectiveECG-gatedgroupswere(2.40±0.02)mSvand(9.97±l.l5)mSv,andshowedsignificantstatisticaldiffer

8、encebetweenthetwogroups(P<0.05).Themeaneffectiveradiationdoseofprospecti