Alternations of Metabolic Profiles in Synovial Fluids and the Correlation with T2 Relaxation Times of Cartilage and Meniscus—A Study on Anterior Cruciate Ligament- (ACL-) Injured Rabbit Knees at Early Stage

Figure 1

MRI scans of control and ACL-injured rabbit knees. Descriptions of the images are as follows: Sagittal image acquired from fat-saturated proton density-weighted (FS-PD) (a) as well as T2 mappings of the medial (b) and lateral (c) tibiofemoral joint in the control knee; sagittal image of PD-FS (d) and T2 mappings of the medial (e) and lateral (f) tibiofemoral joint in the ACL-injured knee. The ACL-injured knees showed clear signs of ACL tear (a) compared to the contralateral control (d). On T2 mapping, according to the color bar on the right, the T2 relaxation times of the cartilage and meniscus in the ACL-injured knee were significantly higher than those of the control knee.