Magnetic resonance imaging of plantar soft tissue structures of the tarsus and proximal metatarsus in foals and adult horses.

The research paper describes a study that uses MRI technology to examine the plantar (underside) soft tissue structures in the lower legs of horses, specifically focusing on tendons and ligaments in the tarsus and metatarsus regions, and considers possible age-related variations.

Methodology

• The researchers used a 0.5 Tesla magnetic resonance system and applied spin and gradient sequences techniques.
• Twenty-two cadaveric hind limbs from Warmblood horses, ranging from one month to twenty-five years old, were analysed.
• For the purpose of statistical analysis, horses were split into two age groups: those three years old and under, and those older than three years.
• The proximal suspensory ligament from six limbs was dissected to assign the signal intensities histologically, allowing for more detailed and accurate analysis.

Findings

• Researchers identified a significantly increased signal intensity within the deep digital flexor tendon in horses older than three years, indicating age-related changes in this tendon.
• Signal variations of the long plantar ligament were observed, but these changes were not significantly linked to the age of the horses.
• The accessory ligament of the deep digital flexor tendon was not consistently visible on all images within the region of interest.
• No age-related changes were determined in the morphology of the proximal suspensory ligament.

Conclusions

• Spin and gradient echoes in MRI examinations proved successful in identifying and assessing plantar aspect soft tissue structures of the equine tarsus and proximal metatarsus.
• Age-related changes in appearance should be considered vital when interpreting the results of such MRI images.