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How Swine Flu Thermal Imaging Cameras-Scanners-Detectors Work

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The thermal imaging cameras work much in the same way as a regular camera works. However normal cameras only see the visible spectrum, infrared or thermal imaging cameras can see past the visible spectrum of light into the infrared spectrum of light. These cameras use very expensive detectors to "see" into the infrared spectrum. Since all objects conduct radiation, infrared cameras can be tuned to see the radiation that radiates in the form of thermal energy. Software then converts the the radiation into a corresponding thermal temperature based on the amount of energy radiating from the object. In other words, everything in the universe radiates with energy, these cameras merely see this energy and calculate the temperature. Unlike Night vision which amplifies visible light to see in the dark, a thermal imaging camera needs no light source and can see in absolute darkness.

Typical Gray Scale image of Crowd for thermal imaging All thermal imaging scanners see in gray scale, but with the help of software, different color palettes can be chosen. Based on the color palette chosen, these cameras can highlight hot spots. By setting the camera for an isotherm, specific temperature ranges can be assigned a color that helps it stand out even more. "These thermal imaging camera systems are extremely sensitive, measuring temperatures down to less than or equal to 0.14°C or 14mK" says Gary Strahan (CEO Infrared Cameras Inc.). "The average thermal imaging cameras on the market today measure down to 0.78° C or 80mK."

In 2002, during the SARS outbreak, several infrared camera systems were put in place in several airports. Mostly set up in Asia, these thermal imaging detectors have been scanning humans for signs of a high fever or other thermal anomalies for several years now. While the thermal cameras do not detect the virus itself, they do detect abnormal temperatures which could be attributed to running a fever - This requires further screening by the airport security to find out why that person is running a fever.

According to Jennifer Strahan of Infrared Cameras Inc., "The recent outbreak of Swine Flu has lead to an increase in demand for thermal imaging camera systems capable of spotting possible infected people. Every week we receive several 100 requests for thermal imaging camera systems that can be used for disease/virus monitoring because of the swine flu outbreak."

With features like hot spot tracking, alarming, relay systems, and isotherms; properly trained staff can easily identify a potential problem before it escalates into epidemic proportions. Screening requires proper training and setup, thermal cameras should be used to screen people one at a time to insure accuracy. Infrared Cameras Inc., is a global leader in thermal imaging systems and currently has several systems that can be used for this type of screening ranging in price from $5,500 to $50,000 depending on sensitivity, lenses, and functions.

by Kirk Eason

About the Author:

Kirk Eason is a Level I Thermographer.