Figure 2.

Image panel representative of some of the MRI findings from the study. (a) Dorsal plane T1W TSE image at the mid aspect of the metacarpophalangeal joint of horse #7 showing a fissure within the subchondral bone plate of the proximal phalanx along the medial aspect of the sagittal groove (white arrows) that is surrounded by sclerosis and intra-osseous fluid accumulation (black arrows). (b) Dorsal plane T1W VIBE image of horse #9 near the dorsal aspect of the metacarpophalangeal joint showing osteophytes arising from the dorsal, proximal, abaxial margins of the proximal phalanx (white arrows). (c) Sagittal plane T1W VIBE image at the mid aspect of the medial third metacarpal condyle showing irregularity of the subchondral bone plate of the third metacarpus and signal alteration of the overlying articular cartilage (white arrows). (d) Sagittal plane PDW TSE image of the medial aspect of the third metacarpal condyle showing regions of low signal bone intensity of the dorsal and palmar aspects of the condyle as indicated by the white arrows.