16层螺旋ct+bolus+tracking技术肝脏门静脉成像及临床应用研究

《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