Infrared Imaging Systems for Human Fever Screening

Screening Site Example

Thermoscreen is placed at the entrance of a hospital to screen patients and visitors upon entering the building as shown in the figure below. When properly trained, a single Thermoscreen station can effectively screen over 1,000 subjects per hour.

Screening Area Setup

The screening area is climate controlled, the temperature varies from 20 to 24°C (68 to 75.2°F), and the relative humidity is approximately 70%. The screening area has diffuse ambient daylight and soft fluorescent lights. At times, outside air enters the building through the entrance doors but the camera and screening area are blocked from any draft using curtain barriers.

During setup, the screening line mat is placed 2m (6'6") away from the camera for subjects to stand on while being screened. The camera is carefully aimed in order to screen subjects with height from 81 to 198cm (2 ’8” to 6’ 6”).

Operator Training

A hands-on training session is conducted for all operators. Operators are trained to operate the Thermoscreen software. The Thermoscreen User Manual is kept on hand at the screening station for operator reference. A screening station logbook is used by operators to record Thermoscreen usage and personnel on duty.

The Screening Process

With the aid of barricades, subjects are channeled into a single file after they enter the building and each subject is screened individually. While in line, a sign notifies individuals to “remove their eyeglasses” (contact lenses do not need to be removed). Another sign instructs them to “stand still and look at the camera” while being screened.

Thermoscreen detects each subject’s face as they enter the screening zone and issues a verbal command to "please stand still and look directly at the camera." After verifying that the subject is standing still and facing the camera, the screening measurement is conducted and the screening result is displayed. During a fever violation, an audible command to "please wait here for an attendant" is issued. For passing subjects, "thank you, you may proceed” is issued.

Screening of each subject requires approximately three seconds. Operator duties include operating the Thermoscreen software, directing subjects into and out of the screening zone, and directing potentially feverish subjects for further evaluation.

This product is currently for export only. Optotherm is currently undergoing the US FDA Premarket Notification (510k) submission process for medical devices. As soon as Thermoscreen has been cleared, this product will be available for purchase in the US.

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