Today, we'll discuss how to take the measurement in order to get the best correlation to core body temperature, as well as some of the most common mistakes made when using FLIR Thermal Imagers. It's important to keep in mind that thermal imaging cameras can not be used to detect a virus or an infection, but can be used to detect Elevated Body Temperature (EBT).
Distance to keep
Screen one person at a time, while keeping a distance of 1 to 2 meters from the camera.
Screen the inner eye corner
Where you measure temperature matters in detecting EBT. While easy to target, the skin surface of the forehead or cheeks are very susceptible to environmental influences. They are impacted by wind, perspiration, and clothing, such as head coverings and hats. To avoid a false alarm, it is recommended that you screen the inner eye corner.
Glasses off
Have the person remove eyeglasses or any other eye obstructions, as thermal cameras cannot image through glass.
Variances in core body temperatures
Several factors can cause body temperature to vary, which can be challenging when trying to detect high body temperature. For example, a person walking outside on a cold day will have a lower body temperature than someone who has been indoors all day.
Other factors can play a role, such as the time of day, camera stability, a person's activity level, as well as their diet, gender, ethnicity and age.
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