Computed tomographic anatomy of the equine tarsus.

This research involves creating a comprehensive reference document for the computed tomographic (CT) anatomy of the equine tarsus, the part of a horse’s leg equivalent to the human ankle. The study meticulously examined the tarsal regions of four healthy adult horses, that were euthanized for unrelated reasons, to provide an in-depth understanding of the area’s anatomy, from bones to soft tissue components.

Methodology

• The tarsal regions of the horses were analyzed. These horses were radiographically and clinically healthy before they were euthanized for reasons not connected to musculoskeletal diseases. Their limbs were amputated at the level of midtibia for this investigation.
• The researchers started their analysis from a level proximal to the tuber calcanei and extended it distally into the proximal metatarsus, using 3-mm thick contiguous transverse CT images.
• To picture contrasting anatomic features in the tarsus, including bones, joints, and various soft tissue components, different imaging settings, specifically soft tissue and bone windows, were applied.

Identification of Structures

• Each transverse slice was meticulously compared with bone models and dissected specimens.
• This comparison helped the researchers accurately identify specific structures in the CT images of the equine tarsus.

Results

• The outputs of the study include nine detailed CT images of the equine tarsus.
• Each image includes labels for both soft tissue and bone-window images. A directional compass is also included in the images, indicating cranial or dorsal and lateral directions.
• Additionally, there is a reconstructed scout image in each that shows the level at which the transverse slice was made.

This research is significant because it presents a harnessing of technology for a detailed examination of an important part of the equine anatomy. The results provide a practical and precise reference document for equine veterinarians and researchers that can be used to enhance understanding of the tarsus, improve diagnostic accuracy, and inform treatment decisions.