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1、RochelleM.Witt,HMSIIIGillianLieberman,MDMultimodalDifferentiationofPosteriorFossaMassesofChildrenRochelleM.Witt,HMSIIIRadiologyCoreClerkshipGillianLieberman,MDAugust23,2010RochelleM.Witt,HMSIIIGillianLieberman,MDOutline-AnatomyofthePosteriorFossa-MenuofTests-IndexPatient-Prese
2、ntation-DifferentialDiagnosis-MultimodalEvaluationofPosteriorFossaMass-CompanionPatients-FutureDirectionsRochelleM.Witt,HMSIIIGillianLieberman,MDPosteriorfossaanatomyTransverseSection:BaseofSkull(uppersurface)rostralcaudalposteriorcranialfossacervicalspinalcordforamenmagnumsag
3、ittalsection"Neuroanatomy."EHSL-SpencerS.EcclesHealthSciencesLibraryRizzo,D.C.Fundamentalsofanatomy&physiologyHomePage.RochelleM.Witt,HMSIIIGillianLieberman,MDMenuoftestsforposteriorfossamasses-MagneticResonanceImaging(MRI):theclinicalgoldstandard-PlainRadiography-Ingeneral,po
4、orchoiceforimagingposteriorfossastructures-Sometimesusedtoexamineforaminaatskullbase-ComputedTomography(CT)-Speedofacquisitionisanadvantage-Initialtestwithoutcontrasttoconsidersubarachnoidbleeding-DoesgivesuperiordetailregardingtumorhistologyAdamandDixon,eds.-VascularTests(200
5、8),sagittalview-OftenusedtoexamineproximitytobloodsupplyGrangierandAllison’sDiagnosticRadiology-FunctionalTests:-Occasionally,PETusedtoconsidertumormetabolismBarkovich(2005)PediatricNeuroimagingRochelleM.Witt,HMSIIIGillianLieberman,MDMenuoftestsforposteriorfossamasses-Magnetic
6、ResonanceImaging(MRI):theclinicalgoldstandard-Multiplanarimagingcapabilities-Compatiblewithcomputerizednavigationtechniques-CTimagingcanhavetissueartifacts,especiallyintheposteriorfossa-Sensitivity:CanidentifyspreadtosubarachnoidspacesBarkovich(2005)PediatricNeuroimagingRochel
7、leM.Witt,HMSIIIGillianLieberman,MDMenuoftestsforposteriorfossamasses-MagneticResonanceImaging(MRI):theclinicalgoldstandard-MultimodalapproachusingMRsuiteoftests-(Patienthistoryandexam)-Conventional,structuralMRimaging-MRperfusion-hemodynamiccharacterization-MRdiffusion-restric
8、tedmovementofnuclei-MRspectroscopy-biochemicalenvironmentofnu
