Fig. 4From: Experimental articular cartilage repair in the Göttingen minipig: the influence of multiple defects per kneeMRI of the four chondral treatment groups. a Empty chondral defect, b Microfracture. The MFx drill holes can be seen in the subchondral area. c Autologous cartilage chips and d MACI. The white arrows mark the defectsBack to article page