Figure 6a. Coronal (a) and sagittal (b) spoiled GRE (6.1/1.6; flip angle, 15°) MR arthrograms obtained in an 18-year-old man 44 months after autologous chondrocyte implantation show heterogeneous hypertrophic repair tissue at the articular portion of the right medial femoral condyle (arrow). F = femur, T = tibia.