Correlation of magnetic resonance images with anatomic features of the equine tarsus.

This research has used magnetic resonance imaging (MRI) to map the anatomical features of the horse’s ankle-equivalent joint (the tarsus) and compared the MRI findings with traditional dissection methods, achieving a high degree of correlation.

Methodology

• The study focused on the tarsus (the ankle-equivalent joint in horses) and utilized MRI scans and plastination (a technique used in anatomy to preserve tissues for long-term study).
• Four clinically normal horses were used in this study. After the horses were euthanized, their pelvic limbs were subjected to MRI scanning using a 1.5-Tesla magnet.
• Post-imaging, the tarsocrural joint spaces and vasculature in the limbs were injected with colored latex to highlight these structures during the subsequent dissection process.
• Then, sagittal (longitudinal) and transverse (cross-sectional) sections of the tarsi were plastinated. Plastination is a process of tissue preservation that makes it possible to study and interpret anatomical structures in great detail and over an extended period time.

Results

• The plastinated tissue slices and corresponding MRI images were scrutinized, and relevant anatomic structures were identified and labeled on both.
• The findings indicated a high degree of correlation between the MRI and plastinated sections. Essentially, the MRI images accurately reflected the anatomic features identified in the plastinated sections.

Conclusions and Implications

• The findings provide important reference standards regarding the normal sizes and positions of anatomic structures in the equine tarsus.
• These reference standards could be very useful in future studies focused on understanding the physiological and clinical aspects of the tarsus in horses. For instance, they may aid in the diagnosis and treatment of equine tarsus injuries and diseases.
• Furthermore, this study demonstrates the effectiveness of using MRI in veterinary medicine for accurately determining the structure of complex joints.