The superior contrast resolution of MRI allows the production of high quality images in any plane through the region of interest. The images generated show the anatomy of bones, joints, muscles, ligaments and tendons at a level unsurpassed by any other modality. In addition to showing normal anatomy, MRI can detect tissue injury that on gross examination may not even be apparent to the human eye. It is the most powerful tool currently available to assess the cause of lameness in horses and has revolutionized the way in which veterinary orthopedic specialists manage equine lameness.
Until the advent of MRI, treatment of lameness was empiric, and largely directed at symptomatic treatment as a specific diagnosis, while suspected, could not be confirmed. MRI has allowed clinicians to make a specific diagnosis and therefore tailor treatment to a specific disease process, thereby optimizing the chances of a positive outcome. Conversely, MRI has given owners definitive information needed to make an informed decision about when to stop treatment for a chronic retractable lameness.