Fig. 8

A 24-year-old male patient underwent ACL reconstruction 3 years ago, the patient complained of knee pain and swelling. In assessment of the MRI knee, the conventional images shows and mild knee joint effusion. Intact ACL graft showing normal position and taut signal, no evidence of tearing or related complications. Sagittal T2 image (A) along the medial femoral condyle level shows intact articular cartilage upon the posterior segment with subtle intrasubstance high signals (Arrow). On the post processing T2 mapping image; (C, D) The colour image along the articular cartilage of the medial femoral condyle posterior segment revealed internal areas of blue colour within the deep layer (white arrows) with increased T2 value (as demonstrated within the curve image (B)) that corresponds to articular cartilage degeneration. According to the international cartilage Repair Society (ICRS) grading system, this corresponds to grade I cartilage degeneration. Sagittal T2 image (A) at lateral femoro-tibial articulation level shows intact articular cartilage overlying the posterior segment of the lateral tibial condyle with intrasubstance high signal. On the post processing colour coded T2 mapping image: (C, D) The colour images along the articular cartilage of the lateral tibial condyle posterior segment revealed internal focal area of green colour (arrows) with increased T2 value (as demonstrated within the curve image (B)) that corresponds to articular cartilage degeneration. According to the international cartilage Repair Society (ICRS) grading system, this corresponds to grade I cartilage degeneration