Fig. 3

The definitions of cartilage ROIs (medial and lateral FT, AFC, CFC, PFC, ATP, CTP, PTP). A Line a was parallel to the tibial plateau (TP) articular surface and went through the posterior (P) femoral condyle (FC). The proximal part of the femoral trochlea (FT) was bordered by line a, and the distal part was bordered by the anterior (A) rim of the anterior menisci horn (triangle b). AFC and ATP were above and below triangle b, respectively. CFC and CTP were above and below the central (C) portion of the meniscus body, respectively. PFC and PTP were above and below the posterior menisci horn (triangle c), respectively. B The corresponding cartilage ROIs (FT, AFC, CFC, PFC, ATP, CTP, PTP) were marked on a morphological T2 sequence before copying to R2* and T2 mapping sequences