SHOULDERMRIDaiHaoSpineandtraumaDept.GuanghuaHospitalANATOMYOFTHESHOULDERAxialObliqueSagittalObliqueCoronalAXIALVIEWOBLIQUECORONALVIEWObliqueSagittalviewROTATORCUFFDISORDERSAcromialTypesTypeIAcromialTypesTypeIIAcromialTypesTypeIIIAcromialTypesTypeIVAcromialDownSlopingNormalAxisofAcromionAnteriorDownSlopingAnteriorDownSlopingEvaluatedonSagittalImagesAxisofAcromionROTATORCUFFPATHOLOGY•Tendonopathy•Tear•PartialThickness,FullThickness,Complete•MusculotendinousRetraction•FattyAtrophy•CalcificTendonitisTendonopathy-IncreasedT1-signal;thickened/-IntermediateT2-signal(NoFluidSignal)PartialThicknessTear(Articular)-T2:FluidSignalextendingintoblacktendon-PartialThicknessUndersurfaceTearPartialThicknessTear(Bursal)-FluidSignalExtendingintotheBursalSurfaceoftheSupraspinatusTendonPartialThicknessTear(Interstitial)-FluidSignalwithintheSubstanceoftheTendon-DoesNotInvolvetheArticularorBursalSurfaceIntramuscularCystRotatorCuffIntramuscularCystRotatorCuff-IntramuscularCystSupraspinatusDelamination(retractionofdeepfibers)FullThicknessTear-Fluidextendsthroughtheentirethicknessofthetendon(superiortoinferior)-MildretractionofmusculotendinousjunctionMassiveTearMusculotendinousretraction-Measureincentimeters;canaffectprognosisFattyAtrophy-Mild,Moderate,Severe-StreaksofhighsignalonT1-Lossofmusclebulk(Sagittal)CalcificTendonitisDarkGlobularAreaonallPulseSequences