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ID:20867721
大小:3.20 MB
页数:56页
时间:2018-10-17
《16层螺旋ct+bolus+tracking技术肝脏门静脉成像及临床应用研究》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、广州医学院硕l:论文16层螺旋CTBolusTracking技术盯脏门静脉成像及临床应用研究werenormal;Atthesametimedidnotresultinchangesinliverbloodsystemdynamicsdiseasesofothersystems,suchasheartfailure,massiveascites,andSOon.100healthyvolunteersweredividedintofivegroupsrandomlybyfivedifferentt
2、riggerscanCTthresholdvaluewithbolustrackingtechnologytriggerscan,eachgroupimproved20cases.FivegroupstriggerscanCTthresholdvaluewereset:(1)triggerscanCTthresholdvalueofgroup1was5Hu,meansthestrengtheningCTvalueofthetriggerpointachieved5Huthatistotrigger
3、MSCTPscan;triggerscanCTthresholdvalueofgroup2waslOHu,meansthestrengtheningCTvalueofthetriggerpointachieved10HuthatistotriggerMSCTPscan;triggerscanCTthresholdvalueofgroup3Was15Hu,meansthestrengtheningCTvalueofthetriggerpointachieved15HuthatistotriggerM
4、SCTPscan;triggerscanCTthresholdvalueofgroupwas20Hu,meansthestrengtheningCTvalueofthetriggerpointachieved20HuthatistotriggerMSCTPscan;triggerscanCTthresholdvalueofgroup5Was25HumeansthestrengtheningCTvalueofthetriggerpointachieved25HuthatistotriggerMSCT
5、Pscan.2.Plainandportalvenous-phasescanusefixed-pointscanwith16-slicespiralCTbyGermany’SSiemensSensationmachine,whichslicethicknessis7.0mm.First,thewholeliverwereexaminedfromdiaphragmtopatbegininplainscan.Accordingtotheresultsofplainscan,choosetriggerp
6、ointandsetthresholdvaluesofgroupsinrightlobewithoutvascularandbileduct,ROIareaset1.0cm2.TriggerscanCTthresholdvalueofgroup1Wassetto5Hu,triggerscanCTthresholdvalueofgroup2wassetto10Hu,triggerscanCTthresholdvalueofgroup3wassetto15Hu,triggerscanCTthresho
7、ldvalueofgroup4Wassetto20Hu,triggerscanCTthresholdvalueofgroup5wassetto25Hu.AfterinjectionofcontrastagentstartwiththelayerofdynamicCTscanningtomonitorthetriggerpointanddescribechangesinthevalueoftime·thedensitycurveatthesametime.Toreachorexceedthepres
8、etthreshold,(delay5s)aformalscanningwereautomaticallytrigger.Subjectswereaskedbreath—holdduringthesamefloordynamicmonitoringscan,andtobreatheslowlyshallowlineduringtheportal一8一广州医学院硕J:论文16层螺旋CTBolusTracking技术肝脏门静脉成像及临床臆用研究venousphasescan.Contr
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