Discoid meniscus Meniscal cyst Meniscal ossicle Meniscal extrusion Bones and Cartilage Ligaments TearsSprains Synovial Fluid Effusion Bakers Cyst Internal Derangements Ligaments ID: 930671
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Slide1
MRI Knee
Slide2Menisci:
Tears/Degeneration
Discoid meniscusMeniscal cystMeniscal ossicleMeniscal extrusionBones and CartilageLigaments:Tears/SprainsSynovial Fluid: EffusionBaker’s Cyst
Internal Derangements
Slide3Ligaments
Slide4Ligaments
Cruciate:
Collaterals:Anterior (ACL)Posterior (PCL)Medial (MCL)Lateral (LCL)
Slide5Ligaments
Cruciates
Slide6Ligaments
Cruciates
Sprain/TearsGrade I sprain (Low-Grade partial tear)Signal around ACLThe fibres of the ligament are stretched, and we can see more than 50% of its fibres intact.Grade II sprain (High-Grade partial tear) Signal within ACLWe can see less than 50% of fibres intact. Grade III tear (Complete ACL tear)ACL
Slide7Ligaments
Cruciates
Sprain/TearsGrade I sprain (Low-Grade partial tear)ACL
Slide8Ligaments
Cruciates
Sprain/TearsGrade II sprain (High-Grade partial tear) ACL
Slide9Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Discontinuous fibersNon-visible fibersAbnormal slope of the ligamentEmpty notch signACL
Slide10Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Discontinuous fibers
Slide11Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Non-visible fibers
Slide12Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Abnormal slope of the ligament
Slide13Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Abnormal slope of the ligament
Slide14Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Abnormal slope of the ligament
Slide15Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Abnormal slope of the ligament
Slide16Ligaments
Cruciates
Sprain/TearsACL
Slide17Ligaments
Cruciates
Sprain/TearsDouble PCL signACL
Slide18Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Empty notch sign
Slide19Ligaments
Cruciates
Sprain/TearsGrade III tear (Complete ACL tear)Empty notch sign
Slide20Ligaments
Cruciates
ACL Cystic Mucoid DegenerationACL
Slide21Ligaments
Cruciates
ACL GangliaACL
Slide22Ligaments
Cruciates
Sprain/TearsPCL
Slide23Ligaments
Collaterals
Sprain/TearsGrade I SprainHigh Signal superficial to the collateral ligamentThe fibres of the ligament are stretched, and apparently intactGrade II Sprain (Partial Tear)Signal within the collateral ligament with disrupted and intact fibresGrade III Tear (Complete Tear)
Slide24Ligaments
Collaterals
Sprain/TearsGrade I Sprain
Slide25Ligaments
Collaterals
Sprain/TearsGrade II Sprain
Slide26Ligaments
Collaterals
Sprain/TearsGrade II Sprain
Slide27Ligaments
Collaterals
Sprain/TearsGrade II Sprain
Slide28Ligaments
Collaterals
Sprain/TearsGrade II Sprain
Slide29Ligaments
Collaterals
Sprain/TearsGrade III Sprain
Slide30Ligaments
Collaterals
Sprain/TearsGrade III Sprain
Slide31Synovial Fluid
Slide32Synovial Fluid
Slide33Synovial Fluid
Slide34Synovial Fluid
Slide35Synovial Fluid
Slide36Synovial
Fluid -
Plica
Slide37Synovial
Fluid -
Plica
Slide38Synovial
Fluid -
Plica
Slide39Baker’s Cyst
Slide40Baker’s Cyst
Slide41Baker’s Cyst
Slide42Baker’s Cyst
Slide43Baker’s Cyst
Ruptured
Slide44Bones and Cartilage
Best Sequences for Cartilage
OsteoarthritisOsteochondral DefectsChondromalacia Patellae
Slide45Best Sequences for Cartilage
Sequence
BoneCartilageFluidT1Signal VoidIsoHypoT2Signal VoidHypoBright PDFSSignal VoidHyperBright GradientSignal VoidHyperBright
Slide46Osteoarthritis
Osteophytosis
Irregular denuded cartilageSubarticular cystic changesJoint effusionNarrowed joint Space
Slide47Osteoarthritis
Slide48Osteoarthritis
Slide49Osteoarthritis
Slide50Osteoarthritis
Slide51Osteoarthritis
Slide52Osteochondral Defects
Slide53Osteochondral Defects
Stages:
Stage I: localised fractureStage II: partially detachedStage III: completely detached, in placeStage IV: completely detached, loose body
Slide54Osteochondral Defects
Slide55Osteochondral Defects
Slide56Osteochondral Defects
Slide57Osteochondral Defects
Slide58Chondromalacia
Patellae
Slide59Chondromalacia
Patellae
Slide60Chondromalacia
Patellae
Slide61Chondromalacia
Patellae
Slide62Chondromalacia
Patellae
GradeMRI findingIFocal signal intensity changes without contour deformity (difficult to assess on MRI)IIFocal signal intensity change and contour bulge (partial thickness)IIIFocal signal intensity change, contour irregularities, cartilage thinning and fluid extension into cartilage (full thickness)IVSimilar to stage III with defects extending to the cortical bone (with subchondral bony changes)
Slide63Chondromalacia
Patellae
Slide64Chondromalacia
Patellae
Slide65Chondromalacia
Patellae
Slide66Menisci:
Tears/Degeneration
Discoid meniscusMeniscal cystMeniscal ossicleMeniscal extrusionBones and CartilageLigaments:Tears/SprainsSynovial Fluid: EffusionBaker’s Cyst
Internal Derangements
Slide67THANK YOU