An Investigation Into Different Measurement Techniques to Assess Equine Proximal Hoof Circumference.

This research article investigates different methodologies for measuring equine proximal hoof circumference (PHC) and their performance relative to one another. It compares traditional measuring tape, 3D scanning, and photogrammetry methods to explore their reliability, repeatability, and accuracy.

Objective of the Research

• The study was carried out to compare three methods of measuring equine proximal hoof circumference (PHC) – a traditional measuring tape, 3D scanning, and photogrammetry technique.
• The aim was to determine the most accurate, reliable, and repeatable method from the three for measuring PHC.
• One reason for this is understanding PHC plays a vital role in early detection of changes in hoof morphology and in the assessment of poor hoof shape.

Research Methodology

• Five equine limbs were obtained from five adult horses to conduct this experiment.
• All three methods were used to measure the PHC of these limbs.
• 3D scanning was considered the reference method for accuracy and was used for method comparisons.
• A linear mixed model was used for conducting pairwise comparisons between the 3D scanner measurement results and the other two methods.

Results of the Study

• The study results asserted that both the measuring tape and the photogrammetry technique tended to overestimate the PHC.
• Compared to 3D scanning, the overestimation by the measuring tape was by 0.96 mm (not statistically significant, P > .05), and by the photogrammetry technique was by 2.2 mm (statistically significant, P < .05).
• Nevertheless, the measuring tape showed excellent interrater and intrarater correlation coefficient indices, indicating its reliability for measuring PHC.
• The variation in PHC measurements using the tape was ±2 mm which, although less accurate than the 3D scanning method, was deemed justifiable for various clinical and horse management applications due to its ease of use and accessibility.

Implications of the Findings

• If accuracy is the main concern, the 3D scanning method is preferable for measuring PHC.
• However, considering overall practicality, reliability, and cost-effectiveness, the traditional measuring tape can still be used in many routine clinical settings and horse management applications.
• More research is needed to optimize the photogrammetry technique in the context of PHC measurements as it tended to significantly overestimate when compared to the 3D scanning method.