Chondral injury Grading in MRI

MRI grading for chondral injury = modified Outerbridge classficiation + Noyes system 

Grade 0	Normal. Intact cartilage
Grade 1	Abnormal chondral signal intensity (oedema)	MRI Grade 1 chondral injury
Grade 2	Superficial defects (fraying, fissuring, ulceration or erosion) with <50% thickness involved	MRI Grade 2 chondral injury
Grade 3	Defects with >50%, <100% thickness involved	MRI Grade 3 chondral injury
Grade 4	Full thickness defect	MRI Grade 4 chondral injury

MRI Grade 1 Chondral injury. Notice the increased signal intensity?

MRI Grade 2 Chondral injury. Notice the chondral thinning?

        

MRI Grade 3 Chondral injury. Notice the deep chondral fissuring?

MRI Grade 4 Chondral injury. Full thickness defects in both tibia and femur