医学影像-正常颅脑CT和MRI影像表课件.ppt

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1、CTANDMRIIMAGINGOFNORMALBRAINNORMALANATOMYOFBRAINBrainisseparatedfromcalvariumbythreemeninges-duramater,arachnoidmembraneandpiamater.Dividedintosupratentorialandinfratentorialcompartmentscontaining:-Supratentorium:CerebralhemispheresdiencephalonInfratentorium:BrainstemstructurescerebellumE

2、achcerebralhemisphereisfurtherdividedintoFrontal,Parietal,TemporalandOccipitallobesbyfissuresBRAINANATOMYSagittalsurfaceLatventGenuFornixPituitaryglandMidbrainPonsMedullaCingulategyrusQuadrigeminalcisternSpleniumColliculi4thventCerebellumThalamusSagittalsurfacePinealglandSup.colliculiInf.C

3、olliculiAqueductofsylviusMidbrainCerebellum4thventriclePonsOculomotornInterthalamiccommissure109InferiorsurfaceInterhemisphericfissureTemporallobeMammillarybodiesFrontallobeOlfactorytractOptictractPit.stalkponsMedullaoblongataCerebellumVermisBrainstemstructuresMidbrain:dividedintoCerebralp

4、edunclesandcolliculi.Supcolliculiattachedtomed.Geniculate&InftolateralGeniculatebodySurroundedbyPeri-mesencephaliccistern.Pons:dividedintotectumandtegmentumConnectsmidbraintomedullaMedulla:continuesasspinalcordContainsascendinganddescendingSpinaltractsCerebellumDividedintotwohemispheresbyf

5、alxcerebelliConnectedinthemidlinebyawormlikestructure-VermisDividedintoI.Anteriorlobeii.MiddlelobeIii.Flocculo-nodularlobeVentriclesofbrainLateralventricle:-Cshapedcavitywithbodyintheparietallobeandextensionsinthefrontaltemporal,occipitallobesConnectedtothirdventriclebyforamenofmonro.Third

6、ventricle:-liesb/wtwothalami.connectedtofourthventriclebycerebralaqueduct.Fourthventricle:-liesinthecerebellumCSFFlow:-Lat.vent->foramenofmonro->3rdvent->cerebralaqueduct->4thvent->foramenofmagindieandluschka->subarachnoidspace>finallyabsorbedbythearachnoidgranulationsVentriclesofbrainBloo

7、dsupplyofthebrainBloodsupplyofthebrainByInternalCarotidandVertebralAInternalcarotidA:MiddlecerebralAAntcerebralAPost.communicatingAAnt.ChoroidalAVertebralAs:-twoVertebralasjointoformBasilarABranches:AntinfcerebellarASupcerebellarAPontineAs&labyrinthineAsPostce