Evaluation of cartilage repair in the distal femur after autologous chondrocyte transplantation using T2 relaxation time and dGEMRIC  J.E. Kurkijärvi,

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Evaluation of cartilage repair in the distal femur after autologous chondrocyte transplantation using T2 relaxation time and dGEMRIC  J.E. Kurkijärvi, M.Sc., L. Mattila, M.D., R.O. Ojala, M.D., Ph.D., A.I. Vasara, M.D., J.S. Jurvelin, Ph.D., I. Kiviranta, M.D., Ph.D., M.T. Nieminen, Ph.D.  Osteoarthritis and Cartilage  Volume 15, Issue 4, Pages 372-378 (April 2007) DOI: 10.1016/j.joca.2006.10.001 Copyright © 2006 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 For two representative patients, PD-weighted FSE image with fat suppression (TR/TE=3500/41ms), and T2 and dGEMRIC maps overlayed on a PD-weighted image. (A) Patient 12 months after surgery shows an isointense graft with elevated T2 and dGEMRIC values. A susceptibility artifact from ACL fixation can be seen on PD-weighted image. (B) Patient 14 months after surgery shows a hyperintense graft with a heterogeneous T2 appearance and dGEMRIC similar to the adjacent and contralateral cartilage. ROIs were manually segmented at the center of the graft (black arrow). For control cartilage ROIs were segmented adjacent to the graft in the sagittal direction and segmented in the contralateral cartilage in the coronal direction (white arrow). Osteoarthritis and Cartilage 2007 15, 372-378DOI: (10.1016/j.joca.2006.10.001) Copyright © 2006 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 For 13 ACT grafts in the sagittal direction, dGEMRIC and T2 values (mean±SD) for bulk, superficial and deep tissue ROIs. Osteoarthritis and Cartilage 2007 15, 372-378DOI: (10.1016/j.joca.2006.10.001) Copyright © 2006 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 For nine ACT grafts in the coronal direction, dGEMRIC and T2 values (mean±SD) for bulk, superficial and deep tissue ROIs. Osteoarthritis and Cartilage 2007 15, 372-378DOI: (10.1016/j.joca.2006.10.001) Copyright © 2006 Osteoarthritis Research Society International Terms and Conditions