Many of you have undoubtedly heard of using MRI in human medicine and now it is becoming more available on the equine side. The primary role for horses is to evaluate soft tissue, bone and joint structures. Being able to "see" a lesion and comment on the integrity of the affected tissues has been a quantum leap in our diagnostic capabilities. Perhaps I can tell an owner very accurately that there is a chip in the fetlock joint, but I can't clearly tell you if it's having an affect on the joint surface at that point. In addition I can see the disrupted ligament fibers in the ligament, but may not be able to see how the neighboring bone is affected by it.