1. MRI Knee

2. Internal Derangements
Menisci:
Tears/Degeneration
Discoid meniscus
Meniscal cyst
Meniscal ossicle
Meniscal extrusion
Bones and Cartilage
Ligaments:
Tears/Sprains
Synovial Fluid:
Effusion
Baker’s Cyst

3. Ligaments

4. Ligaments Cruciate: Collaterals: Anterior (ACL) Posterior (PCL)
Medial (MCL)
Lateral (LCL)

5. Ligaments
Cruciates

6. Ligaments ACL Sprain/Tears Grade I sprain (Low-Grade partial tear)
Cruciates
Sprain/Tears
ACL
Grade I sprain (Low-Grade partial tear)
Signal around ACL
The 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 ACL
We can see less than 50% of fibres intact.
Grade III tear (Complete ACL tear)

7. Ligaments ACL Sprain/Tears Cruciates Grade I sprain
(Low-Grade partial tear)

8. Ligaments ACL Sprain/Tears Cruciates Grade II sprain
(High-Grade partial tear)

9. Ligaments ACL Sprain/Tears Grade III tear (Complete ACL tear)
Cruciates
Sprain/Tears
ACL
Grade III tear (Complete ACL tear)
Discontinuous fibers
Non-visible fibers
Abnormal slope of the ligament
Empty notch sign

10. Ligaments Sprain/Tears Grade III tear (Complete ACL tear) Cruciates
Discontinuous fibers

11. Ligaments Sprain/Tears Grade III tear (Complete ACL tear) Cruciates
Non-visible fibers

12. Ligaments Sprain/Tears Grade III tear (Complete ACL tear) Cruciates
Abnormal slope of the ligament

13. Ligaments Sprain/Tears Grade III tear (Complete ACL tear) Cruciates
Abnormal slope of the ligament

14. Ligaments Sprain/Tears Grade III tear (Complete ACL tear) Cruciates
Abnormal slope of the ligament

15. Ligaments Sprain/Tears Grade III tear (Complete ACL tear) Cruciates
Abnormal slope of the ligament

16. Ligaments
Cruciates
Sprain/Tears
ACL

17. Ligaments
Cruciates
Sprain/Tears
ACL
Double PCL sign

18. Ligaments Sprain/Tears Grade III tear (Complete ACL tear) Cruciates
Empty notch sign

19. Ligaments Sprain/Tears Grade III tear (Complete ACL tear) Cruciates
Empty notch sign

20. ACL Cystic Mucoid Degeneration
Ligaments
Cruciates
ACL Cystic Mucoid Degeneration
ACL

21. Ligaments
Cruciates
ACL Ganglia
ACL

22. Ligaments
Cruciates
Sprain/Tears
PCL

23. Ligaments Sprain/Tears Grade I Sprain
Collaterals
Sprain/Tears
Grade I Sprain
High Signal superficial to the collateral ligament
The fibres of the ligament are stretched, and apparently intact
Grade II Sprain (Partial Tear)
Signal within the collateral ligament with disrupted and intact fibres
Grade III Tear (Complete Tear)

24. Ligaments
Collaterals
Sprain/Tears
Grade I Sprain

25. Ligaments
Collaterals
Sprain/Tears
Grade II Sprain

26. Ligaments
Collaterals
Sprain/Tears
Grade II Sprain

27. Ligaments
Collaterals
Sprain/Tears
Grade II Sprain

28. Ligaments
Collaterals
Sprain/Tears
Grade II Sprain

29. Ligaments
Collaterals
Sprain/Tears
Grade III Sprain

30. Ligaments
Collaterals
Sprain/Tears
Grade III Sprain

31. Synovial Fluid

32. Synovial Fluid

33. Synovial Fluid

34. Synovial Fluid

35. Synovial Fluid

36. Synovial Fluid - Plica

37. Synovial Fluid - Plica

38. Synovial Fluid - Plica

39. Baker’s Cyst

40. Baker’s Cyst

41. Baker’s Cyst

42. Baker’s Cyst

43. Baker’s Cyst
Ruptured

44. Bones and Cartilage Best Sequences for Cartilage Osteoarthritis
Osteochondral Defects
Chondromalacia Patellae

45. Best Sequences for Cartilage
Bone
Cartilage
Fluid T1
Signal Void
Iso
Hypo T2
Bright
PDFS
Hyper
Gradient

46. Irregular denuded cartilage Subarticular cystic changes Joint effusion
Osteoarthritis
Osteophytosis
Irregular denuded cartilage
Subarticular cystic changes
Joint effusion
Narrowed joint Space

47. Osteoarthritis

48. Osteoarthritis

49. Osteoarthritis

50. Osteoarthritis

51. Osteoarthritis

52. Osteochondral Defects

53. Osteochondral Defects
Stages:
Stage I: localised fracture
Stage II: partially detached
Stage III: completely detached, in place
Stage IV: completely detached, loose body

54. Osteochondral Defects

55. Osteochondral Defects

56. Osteochondral Defects

57. Osteochondral Defects

58. Chondromalacia Patellae

59. Chondromalacia Patellae

60. Chondromalacia Patellae

61. Chondromalacia Patellae

62. Chondromalacia Patellae
Grade
MRI finding I
Focal signal intensity changes without contour deformity (difficult to assess on MRI) II
Focal signal intensity change and contour bulge (partial thickness)
III
Focal signal intensity change, contour irregularities, cartilage thinning and fluid extension into cartilage (full thickness) IV
Similar to stage III with defects extending to the cortical bone (with subchondral bony changes)

63. Chondromalacia Patellae

64. Chondromalacia Patellae

65. Chondromalacia Patellae

66. Internal Derangements
Menisci:
Tears/Degeneration
Discoid meniscus
Meniscal cyst
Meniscal ossicle
Meniscal extrusion
Bones and Cartilage
Ligaments:
Tears/Sprains
Synovial Fluid:
Effusion
Baker’s Cyst

67. THANK YOU