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ID:34208874
大小:2.25 MB
页数:32页
时间:2019-03-04
《双源flash ct前瞻性心电门控序列扫描窄r-r间期曝光显示冠状动脉的可行性研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、中文摘要英文摘要符号说明目录前言⋯⋯⋯⋯··材料与方法”结果⋯⋯⋯⋯讨论⋯⋯附图参考文献⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯综述⋯⋯⋯⋯⋯致谢⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯攻读学位期间发表的学术论文⋯⋯⋯⋯⋯⋯原创性声明⋯⋯3810⋯11双源HashCT前瞻性心电门控序列扫描窄R-R问期觥显篙=悯究I$Y25/lllll/IMll075iM墨/5ll研究生:王汉纪v.'只n7sR5专业:影像医学与核医学导师:王锡明教授中文摘要动脉造影(coronaryangiography,CAG)。数据采集时相:实验组,当心率175次/min【l】检验;计数资料采用f检验,
2、以P<0.05为差异有统计学意义。评价实验组与对照组在图像质量、辐射剂量(mSv)及准确性上是否有统计学差异。结果200例患者均成功完成了前瞻性心电门控双源FlashCT冠状动脉血管成像,实验组有53例同期行SCAG检查的患者,阳性诊断准确率92.45%,对照组有51例同期行SCAG检查的患者,其阳性诊断准确率为90.20%;图像质量:实验组可诊断图像占97%,对照组可诊断图像占96.9%,差异无统计学意义;辐射剂量:实验组有效辐射剂量平均为(3.01+0.45)mSv,对照组有效辐射剂量平均为(6.914-0.38)mSv,较对照组降低了56.3
3、%,差异有统计学意义。结论双源FlashCT前门控序列扫描窄R-R间期曝光在保证图像质量的前提下可明显降低辐射剂量,其诊断准确率与金标准SCAG相比得到较高的一致性,可以成为冠心病患者的一种安全可靠的检查方法。关键词双源FlashCT;冠状动脉CTA;辐射剂量;前门控序列扫描2FEASⅡⅡLITYOFPROSPECTIVEECG.GATEDSTEP—AND.SⅡoOTSCANNINGDI瓜INGNARROW10RINTERPHASEINT珊CoRONARYCTANGIOGRAPHYWITHDUALSOURCEFLASHCTGraduate:Hanj
4、iWangMajor:MedicalImagingandNuclearMedicineSupervisor:XimingWangABSTRACTobjectiveToinvestigatethefeasibilityofcoronaryarteryimagingbydualsourceflashCTnarrowingtheexposuretimewindowandanalyzeitsdifferencesofaccuracy,imagequalityandradiationdosewiththecontrolgroup.MaterialsandMe
5、thods200patients(bodymassindex03MI)Was23-25kgl武,sinusandchangesinheartrateS10bmp)thatunderwentcoronaryarteryimagingwithprospectiveECG-gatedacquisitioninourhospitalwererandomlydividedinto2groups、jl,i血100casesineachgroup,100patients(56male,44female;agerange,36—74years;averageage
6、,49.2士11.5years)wereincludedinexperimentalgroup.111econtrolgroupconsistedof100patients(61male,38female;agerange,35~72years;averageage,54.3+11.5years).Therewere53patientsintheexperimentalgroupthatunderwentcoronaryangiography(SCAG)}while51patientsinthecontrolgroup.Damacquisition
7、phasediffersfromtheheartrate.Fortheexperimentalgroup,whentheheaItrateWasslowerthan75bmp,65%~75%RRintervalofexposurewaschosen;conversely,ifheartrateWasfasterthan75bmp,35%~45%RRintervalWaschosen;35%~70%RRintervalexposureWaschoseninallpatientsincontrolgroup.Tubevoltagewasadjusted
8、accordingtothebodyweightmassindex①旧.1t-Was120kVWhenmeBMIis23~
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