P. -H. Tsai, M. -C. Chou, H. -S. Lee, C. -H. Lee, H. -W. Chung, Y. -C

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MR T2 values of the knee menisci in the healthy young population: zonal and sex differences P.-H. Tsai, M.-C. Chou, H.-S. Lee, C.-H. Lee, H.-W. Chung, Y.-C. Chang, G.-S. Huang Osteoarthritis and Cartilage Volume 17, Issue 8, Pages 988-994 (August 2009) DOI: 10.1016/j.joca.2009.03.009 Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 (a) Schematic representation of a posterior view of the knee joint and 20 contiguous axial slices acquired for positioning of the nearly sagittal slices. Dotted areas: menisci. (b) For the axial slice showing the largest width of femoral condyles on both the medial and lateral sides of the knee joint, nine nearly sagittal slices with the orientation parallel to the anteroposterior long axis of the femoral condyle were prescribed for both the medial and lateral sides. Dotted areas: menisci projected onto this axial plane. 1: Femur; 2: tibia; 3: fibula; 4: medial condyle; 5: lateral condyle; A: anterior; P: posterior. Osteoarthritis and Cartilage 2009 17, 988-994DOI: (10.1016/j.joca.2009.03.009) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Example of an ROI placement on a nearly sagittal slice of the knee menisci is shown. The selection of ROIs is performed on the first-echo image, which is enlarged on the right side. The black arrows indicate the separation between the three zones, and each zone occupies about one-third the width of the meniscus. Osteoarthritis and Cartilage 2009 17, 988-994DOI: (10.1016/j.joca.2009.03.009) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 (a) A schematic diagram representing the three diverse zones of the meniscus, including the red (R), red/white (R/W), and white (W) zones. (b) The cross-section of the posterior horn of the meniscus along the nearly sagittal image slice. Osteoarthritis and Cartilage 2009 17, 988-994DOI: (10.1016/j.joca.2009.03.009) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 4 T2 values of the posterior horn of the medial and lateral menisci at the different zones selected. The bar chart shows that the T2 value tended to increase from the inner white zone to the outer red zone of the posterior horns. Osteoarthritis and Cartilage 2009 17, 988-994DOI: (10.1016/j.joca.2009.03.009) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 5 T2 values of the posterior horn compared between the medial and lateral of the menisci in the different ROIs selected. Osteoarthritis and Cartilage 2009 17, 988-994DOI: (10.1016/j.joca.2009.03.009) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions

Fig. 6 T2 values of the posterior horn of medial and lateral menisci compared between men and women in the different ROIs selected. Osteoarthritis and Cartilage 2009 17, 988-994DOI: (10.1016/j.joca.2009.03.009) Copyright © 2009 Osteoarthritis Research Society International Terms and Conditions