From:  Standardizing infrared thermography for occupational applications: an integrative narrative review of protocol quality, thermal metrics, and multimodal integration in work-related musculoskeletal disorders

 Operational checklist for clinical infrared thermography (IACT/AAT).

DomainMandatory (minimum for clinical validity)Recommendation—good practices
EnvironmentStable temperature (ΔT ≤ 1.0°C); absence of drafts; non-reflective surfacesNatural convection < 0.2 m/s; relative humidity < 70%; continuous recording of temperature and relative humidity using a calibrated thermo-hygrometer.
Room temperature20–24°C (adjusted to the region under evaluation)20–21°C for inflammatory processes; 22–24°C for extremities
Relative humidityControlled; avoid sweating/condensation50–60% as the comfort zone
Acclimatization≥ 15 min, target area exposed throughout the entire period20 min if ambient temperature is > 21°C; repeated series for medicolegal purposes
EquipmentEmissivity ε = 0.98; NEDT/NETD ≤ 80 mK (AAT: ≤ 50 mK); resolution ≥ 19,200 pixelsAnnual calibration check; reference blackbody when available
AcquisitionPerpendicular positioning; symmetric bilateral views; identical scales between viewsFixed tripod; standardized distance; discrete anatomical markers
PatientNo creams/oils; no exercise on the day of the exam; no TENS/EMS/ultrasound in the previous 24 hAvoid caffeine/nicotine for 4 h; withhold vasoactive/opioid medications for > 24 h (when clinically safe)
DocumentationRecord temperature and relative humidity, acclimatization time, distance, and task/stress protocolStandardized template plus checklist signed by the operator

AAT: American Academy of Thermology; IACT: International Academy of Clinical Thermology; ΔT: temperature difference; EMS: electrical muscle stimulation; NEDT: noise-equivalent temperature difference; TENS: transcutaneous electrical nerve stimulation.