Comparison between standard ultrasonography, angle contrast ultrasonography, and magnetic resonance imaging characteristics of the normal equine proximal suspensory ligament.

The research compares different imaging techniques for studying the anatomical characteristics of the equine proximal suspensory ligament, with a focus on standard ultrasonography, angle contrast ultrasonography, and MRI.

Objective and Methodology

• The objective of this study was to assess the efficiency of different imaging techniques in illustrating the anatomical characteristics of the horse suspensory ligament, particularly in the forelimb. This focus arises from doubts about the effectiveness of standard ultrasonography in achieving this goal.
• The study involved horses that exhibited no forelimb lameness or palpable abnormalities in the suspensory ligament area. These criteria ensured that the research was based on normal suspensory ligaments.
• The researchers used standard ultrasonography, angle contrast ultrasonography, and MRI to examine the proximal suspensory ligaments in 20 forelimbs. The evaluation was followed by a histologic analysis.

Parameters and Findings

• Several parameters were considered while estimating the total transverse area of the proximal suspensory ligament. These included the total area of the ligament, ligament fibers, muscles, and fats. This measurement was carried out using both ultrasonography methods, MRI, and histologic sections.
• The size and tissue distribution of the suspensory ligament lobe were also examined and graded for asymmetry. In this process, the angle contrast ultrasonography technique was found to enhance the differentiation of fibers from other tissue types and facilitated the identification of the ligament’s peripheral margin.
• No significant difference was observed in the asymmetry scores between the different imaging techniques. However, the asymmetry scores of the right and left forelimbs were considerably different with both ultrasonography and MRI. This difference was observed at the measurement level.

Conclusion

• Although the angle contrast ultrasonography has its limitations when compared to MRI, it offers additional diagnostic information not obtainable with the standard ultrasound technique. This finding implies that the angle contrast ultrasonography technique could serve as a more efficient tool for examining the anatomical characteristics of the equine proximal suspensory ligament.