3 Dimensional photonic scans for measuring body volume and muscle mass in the standing horse.

Summary

# Editorial Summary: 3D Photonic Scanning for Equine Muscle Mass Assessment Quantifying muscle mass has long posed a challenge in equine practice despite its critical role in performance, soundness and recovery from illness, with existing methods limited to subjective visual scoring or requiring sedation and imaging technology. Researchers at UC Davis developed and validated a 3D photonic scanning protocol to objectively measure torso and hindquarter volumes in standing, unsedated horses as a non-invasive proxy for regional muscle mass. The methodology captured detailed volumetric data from multiple scanning angles, allowing precise quantification of muscular development across different body regions without the need for specialised facilities or animal restraint beyond normal handling. By establishing baseline measurements and demonstrating reproducibility, this approach provides equine professionals—including farriers assessing limb loading, veterinarians monitoring rehabilitation, physiotherapists tracking training adaptations, and nutritionists evaluating dietary interventions—with an objective tool for documenting changes in muscle development over time. The capacity to measure muscle mass longitudinally offers particular value in monitoring recovery from myopathies, assessing the efficacy of conditioning programmes, and identifying asymmetries that may predispose to injury or performance issues.

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Key Findings

• •3D photonic scanning provides a non-invasive method to quantify torso and hindquarter volumes in standing horses
• •This methodology offers a practical alternative to existing muscle mass measurement techniques in equine practice
• •Regional volume measurements correlate with muscle mass distribution relevant to performance assessment

Conditions Studied