非骨水泥型人工髋关节假体松动ct与x线评估以与减少ct金属伪影的-研究

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1、万方数据南京医科大学硕士学位论文ObjectiveAbstract1．Toexploretheimagingmanifestationsoflooseningofthecementlessartificialhipprosthesis2．ToexploretheeffectofMulti—detectorcomputedtomography(MDCT)scanparametersandpost—processingimagingmethodsonmetallicartifacts，SOastoachievetheperfectioninreductionofartifactscausedby

2、metallicimplants．Materialsandmethods1．X—rayplainfilmsandCTimagesbeforethefirstrevisionafterthecementlessartificialhipreplacementof37caseswereanalyzedretrospectivelyandcontrastedwiththeintraoperativeexplorationresults．Thentherelationshipbetweentheprosthesislooseningandthethicknessandzonesinvolvingof

3、theradiolucentline，thefractureofthescrewofacetabularcupandthelucentlinearoundthescrewweresummaried．2．TitaniumwaterphantomdesignedbyUSwasscannedunderMDCTwithalternatingscanparametersincludingtubevoltage，tubecurrent，pitchmadfocalspot．Thentheareasofimageartifactsweremeasuredtoevaluatetheirrelevance．15

4、postoperativepatientswithimagesofvertebralimplantationwereobtainedunderconventionalSCanparametersandwerepost—processedbyusingoptimizedreconstructionandconventionalmethodssuchasmulti—planarreconstruction(MPR)，windowwidthandleveladjustment，volumerenderingtechnique(VRT)andthenevaluationofthequalityofi

5、mages．Results1．(1)16casesofnolooseningacetabularprosthesis：6caseswithnoradiolucentlineinzonesI～III(37．5％)；4caseswith>2mmradiolucentlineinonezone(25．0％)；2caseswith<2mmlucentlineinzonesIandII(12．5％)；4caseswith<2mrnradiolucentlineinzonesI～III，butatleastwithonezone墨1ram(25．0％)；(2)12casesoflooseningacet

6、abularprosthesis：5caseswith>2mmradiolucentlineatleastintwo3万方数据南京医科大学硕士学位论文zones(41．7％)；4caseswith>1mmradiolucentlineinzonesIMII(33．3％)；2caseswith>1mmradiolucentlineinonlyonezone；1casewithradiolucentlineinzonesIMIIaswellasS1mmradiolucentlineinonezone；(3)18casesofnolooseningfemoralprosthesis：12cases

7、withonradiolucentline(66．7％)；6caseswiththescatteredradiolucentline(33．3％)，5oftheminvolvingnomorethantwozones；(4)10casesofasepticlooseningfemoralprosthesis：3caseswith>1mmradiolucentlineinzones1-7(30．0％)；4cas