Infrared Thermography for Lameness in Horses – 2025 Vet Imaging Guide 🔥🐴📸

By Dr Duncan Houston, BVSc

Overview of Thermography in Equine Practice 🧠

Infrared thermography is an imaging technology that detects heat emitted from the horse’s body. While it has been around for decades, its popularity has resurged in recent years—particularly as a non-invasive tool for diagnosing lameness. 🦶📸

How It Works 🔬

Thermographic cameras detect infrared radiation and translate it into color-coded images. Warmer areas show up in red and orange, and cooler zones in blue or green. Areas with inflammation—due to injury, strain, or disease—tend to emit more heat and appear brighter in scans. 🔥

Clinical Applications 🩺

• ✅ Detecting localized inflammation in tendons, joints, or muscles
• ✅ Monitoring healing progress over time
• ✅ Comparing left vs. right limb temperature symmetry
• ✅ Evaluating saddle fit issues or pressure points on the back 🐎

The Importance of Expertise 🧑‍⚕️

For thermography to be accurate and clinically useful, it must be:

1. 📷 Performed using professional-grade equipment
2. 📊 Conducted in a temperature-controlled environment
3. 🧠 Interpreted by a licensed veterinarian trained in thermographic analysis

According to the American Academy of Thermology (AAT), only veterinarians should conduct and interpret scans. Diagnosis by non-veterinarians is both scientifically unreliable and legally prohibited. 🚫

Common Misuse & Red Flags 🚨

Thermal scans can be misleading if interpreted incorrectly or used to diagnose conditions that cannot be detected with thermography. For example:

• ❌ Diagnosing equine protozoal myeloencephalitis (EPM) via thermography – not possible
• ❌ Suggesting treatment plans without clinical exam or confirmation testing
• ❌ Scans performed outdoors in uncontrolled environments

These misuses are unfortunately becoming more common as thermographic cameras become more affordable for non-vets to purchase. 💸

When Thermography Works Well 🟢

Thermography excels as a complementary diagnostic tool—not a standalone method. It helps identify problem areas and narrow the focus for further diagnostics like:

• 🔍 Radiographs (X-rays)
• 📈 Ultrasound
• 💉 Nerve blocks
• 🧪 Blood work

It's also helpful in evaluating saddle pressure points, soft tissue inflammation, and temperature asymmetry before clinical signs become obvious. For these uses, thermography is an early-warning system. ⚠️

Smart Use Tips for Owners 💡

• ✅ Only work with veterinarians certified in thermographic interpretation
• ✅ Ask if the provider follows AAT Veterinary Guidelines
• ✅ Use thermography to guide further clinical diagnostics—not replace them
• ✅ Always confirm lameness with physical exam and follow-up testing

Case Example 🐴

Horse: 11-year-old barrel racing mare
Problem: Subtle hind limb lameness, intermittent performance issues
Thermography Findings: Increased heat in right hock
Vet Follow-Up: Ultrasound confirmed inflammation in the distal suspensory ligament
Outcome: 6 weeks of controlled exercise and NSAIDs resolved the issue. 👏

FAQs About Equine Thermography ❓

Q: Can thermography diagnose deep injuries?

A: No. It’s most effective for superficial issues near the skin’s surface. It’s best for screening, not deep diagnosis. 🛑

Q: Is it safe for horses?

A: Yes! It’s 100% non-invasive, stress-free, and uses no radiation. Great for nervous or sensitive horses. 😌

Q: What conditions should not be diagnosed by thermography?

A: Neurologic conditions (e.g., EPM), tumors, bone fractures, and many internal issues. These require more advanced diagnostics. 🧪

Final Thoughts 🧾

Infrared thermography can be a valuable addition to your horse's lameness workup, but only in the right hands. Misuse by unqualified individuals can lead to misdiagnosis, wasted money, and delayed treatment. 🕰️💸

Always consult your veterinarian if thermography is recommended for your horse, and check that they follow certified guidelines. For expert consultations, visit AskAVet.com or download the Ask A Vet app to connect directly with Dr Duncan Houston and our trusted equine team. 🐴📱🧑‍⚕️