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Longitudinal Evaluation of Cartilage Composition of Matrix-Associated Autologous Chondrocyte Transplants with 3-T Delayed Gadolinium-Enhanced MRI of Cartilage

Katja Pinker1, Pavol Szomolanyi2, Goetz C. Welsch1, Tallal C. Mamisch3, Stefan Marlovits4, Andreas Stadlbauer5 and Siegfried Trattnig1

1 Department of Radiology, MR Centre of Excellence, Medical University Vienna, Lazarettg. 14, 1090. Vienna, Austria.
2 Department of Imaging Methods, Institute of Measurement Science, Slovak Academy of Sciences, Bratislava, Slovak Republic.
3 Orthopedic Surgery Department, Inselspital, Bern, Switzerland.
4 Department of Traumatology, Centre for Joints and Cartilage, Medical University Vienna, Vienna, Austria.
5 Department of Radiology, Landesklinikum St. Poelten, St. Poelten, Austria.


Figure 1
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  		Fig. 1A —24-year-old man 6 months after matrix-associated autologous chondrocyte transplantation. Color-coded contrast-enhanced T1 maps of cartilage at baseline (A) and follow-up (B) show significantly lower T1 values in transplant area than in normal hyaline cartilage. Arrows (B) indicate borders of transplant. Pink indicates zonal regions of interest in normal cartilage and transplant.

 

Figure 2
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  		Fig. 1B —24-year-old man 6 months after matrix-associated autologous chondrocyte transplantation. Color-coded contrast-enhanced T1 maps of cartilage at baseline (A) and follow-up (B) show significantly lower T1 values in transplant area than in normal hyaline cartilage. Arrows (B) indicate borders of transplant. Pink indicates zonal regions of interest in normal cartilage and transplant.

 

Figure 3
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  		Fig. 2 —Graph shows relative change in longitudinal relaxivity ({delta}R1) values of matrix-associated autologous chondrocyte transplants at baseline (gray) and 1-year follow-up (white). Most patients had at least moderate to minor decrease in relative {delta}R1 over time, which corresponds to slight increase in glycosaminoglycan content in cartilage repair tissue.

 

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