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Figure 8. Variations in signal intensity of repair tissue on GRE (8.8/4.2; flip angle, 60°) images obtained in three patients after autologous chondrocyte implantation at the right femoral trochlea. Axial image obtained in a 21-year-old man 17 months after implantation shows isointense signal with minimal irregularity at the cartilage reconstruction site (arrow).