下肢动脉双能cta临床应用价值的分析

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1、第三军医大学硕士学位论文TheStudyingoftheclinicalvalueofdual--energycomputedtomographyangiographyinlowerextremityAbstractObjectives：(1)Usedtogeneratedualenergyautomaticallybone-subtractedimagesaswellasboneandplaque—subtractedimagesandstandardautobonesubtractionimages，Residualbonewasremovedmanual

2、ly．Operatortimeforboneremovalandpresenceofvesselerosionswasmeasured．StenosisgradinginplaquesubtractedandunsubtractedimagesWasassessedandcorrelated．Tostudytheclinicalvalueofdual-energyboneandcalciumremovalinlowerextremitycomputedtomographyangiography．(2)Tostudytheaccuracyofdual—energ

3、ycomputedtomographicangiography(DE-CTA)fortheassessmentofsymptomaticperipheralarterialocclusivediseaseofthelowerextremitybyvariouspost—processingimagesobtainedbytheDECTAcomparedwithDSAimages；Respectively，byusingthedual—energyboneremovaltechniqueandastandardautoboneremovaltoolobtaine

4、dafterdual-energyandafterthetraditionalautobonelessMIPimagescomparedwithDSAimages，Operatortimeforboneremovalwasmeasured，tostudytheclinicalvalueofthedual-energylowerextremitymaximumintensityprojectionCTAimageinlowerextremityarterialocclusivedisease．(3)FollowtheprinlipleofALARA(aslowa

5、sreasonablyachievable)，ChangingmAsvalueaccordingtopatientBMIinthedual—energyCTAoflowerextremityarterialexamination，westudythatifreducingmAsvaluecanachievenotonlyreducesthepatientsreceivedradiationdosesbutalsotoensureimagequality，tomeettherequirementsofthepurposeofdiagnosis．Materials

6、andMethods：(1)43patients(86lowerlimb)beingdoubtoflowerlimbarterydiseaseswerescannedbydualenergyCT，thefollowingSCanrangefromaortabelowrenaltothefoot，TransmittheoriginalaxialimagestoSiemensworkstation(syngo2008C)，usingthree—dimensionalmaximumintensityprojection(MIP)，curvedplanarreform

7、ation(CPR)，volumerendering2第三军医大学硕士学位论文(VR)techniquesforimagereconstruction，usedtogenerateautomaticallybone—subtractedimagesaswellasboneandplaquesubtractedimagesandstandardautobonesubtractionimages．Residualbonewasremovedmanually．Operatortimeforboneremovalandpresenceofvesselerosionsw

8、asmeasured．Stenosis