Fig. 4.

3D analysis of the menisci. MR imaging based, quantitative 3D analysis of the menisci in the medial compartment: a coronal MR image from a double echo steady state sequence (with water excitation) with segmentation of the medial meniscus; b–c 3D reconstruction of the medial meniscus depicting: ACdAB (joint surface of the tibia, consisting of the area of the cartilage surface, and denuded areas of subchondral bone if applicable); the femoral (FA), tibial (TA), and external surface (EA) of the medial meniscus; meniscal thickness and width; overlap area between TA and ACdAB (ACdAB.Cov), uncovered area of the TA (TA.Uncov), overlap distance (OvD) and extrusion distance (Ex)