Magnetic resonance imaging is a newer diagnostic modality that provides a very detailed look at the soft tissue and bones of the lower limb. The MRI is most often used in difficult lameness cases when we are unable to diagnose a cause with conventional imaging (x-rays, ultrasound). The MRI also provides us with a way to evaluate the soft tissue structures within the foot and hoof capsule, as we are unable to ultrasound this area. We are also able to evaluate the bones of the lower limb in order to diagnose very small fractures, concussive injury (bone bruise), and joint disease.

 

The highest areas we can image with MRI in the horse are the carpi (“knees”) and hocks. MRIs of the fetlock region and below can be performed under standing sedation only. Patients can generally go home the same day after a standing MRI. If images of the hock or carpus are required, the horse will be placed under general anesthesia and the magnet maneuvered to scan the limb.

Arizona Equine installed a Hallmarq© standing MRI in 2005. Our MRI is housed inside our clinic in a specialized climate controlled room with copper shielding to prevent interference. We also have MRI safe anesthetic monitoring equipment and a ventilator in this room as well. All images acquired are sent to a board certified veterinary radiologist for interpretation. Once we receive the results, we can then design a treatment plan specific to each patient and client