Introduction
Optotherm's technology provides the most accurate method of mass screening for elevated facial skin temperatures that may indicate a fever. Because it is both fast and noninvasive, Thermoscreen is the best way to safeguard areas with high pedestrian flow.
Thermoscreen was originally developed in response to the need to screen large numbers of individuals for potential fever during the SARS outbreak in 2003. Thermoscreen scans subjects without contact from a distance, providing a discreet and safe method of detecting potentially feverish individuals. Over 1,000 individuals can be screened per hour so as not to restrict pedestrian flow. Thermoscreen is sold as a complete, fully tested system including a computer with preinstalled hardware and software.
Lowest Rate of Missed Detections and False Positives
Thermoscreen's sophisticated measurement process involves precision calibration, face and movement detection, ambient temperature compensation, and subject group compensation. Together, these unique features provide unparalleled ability to reduce the number of missed detections and false violations. A low false violation rate allows Thermoscreen to be employed in applications where a high number of false positives are unable to be effectively processed.
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.
Applications
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Hospitals
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Protect both patients and visitors.
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Airports
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Screen arriving and departing passengers.
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Businesses
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Safeguard the health of patrons and employees.
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Educational Institutions
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Help provide a safe environment for students and faculty.
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How it Works
Thermoscreen's high-accuracy Infrasight infrared camera, manufactured by Optotherm, measures skin temperature by detecting and quantifying the infrared energy that is continuously being emitted from the face. As individuals walk up to the screening station, skin temperatures above a predefined threshold are detected and displayed in bright colors on the computer screen. Verbal instructions and screening results are announced through the computer's speakers and an audible alarm is activated to notify personnel that a temperature violation has occurred.
Integrated Visual Camera
A visual camera is mounted inside the camera enclosure next to the infrared camera to provide continuous visual images of subjects as they pass through the screening zone. Real-time video enables operators to quickly identify subjects as they are being screened. Highlighted areas and temperature values on the thermal image are transferred to the visual image so that operators can quickly process screening results.
Mobile Camera Stand
When mounted on the mobile computer stand, Thermoscreen can be moved quickly to alternate locations in order to screen additional groups of people or to accommodate changes in pedestrian flow. Thermoscreen is a completely passive device and emits no harmful radiation.
Disease
Communicable Diseases
Coronavirus disease 2019
COVID-19 is a contagious disease cause by the SARS-CoV-2 virus and was first identified in Wuhan, China in December 2019. It quickly spread worldwide and resulted in the COVID-19 pandemic. The symptoms of COVID-19 often include fever and transmission occurs when the virus is breathed in or comes in contact with the eyes, nose, or mouth. The COVID-19 pandemic resulted in over 700 million confirmed cases and over 7 million reported deaths globally.
Seasonal Influenza
Influenza kills over a million people worldwide every year with over 35,000 deaths in the US alone, and causes over 200,000 birth defects. It is one of the top ten causes of death in the United States. Even when yearly vaccines are accurately gauged against the prevalent strains coming from Asia, flu shots are still only 50% effective for Americans over 50. In spite of receiving flu vaccines, during an ordinary flu season in the USA, over 25% of the population is infected with Influenza.
Ebola
Ebola virus disease (EVD), formerly known as Ebola hemorrhagic fever, is a severe, often fatal illness in humans that is transmitted to people from wild animals and spreads in the human population through human-to-human transmission. The average EVD case fatality rate is around 50%. The first EVD outbreaks occurred in remote villages in Central Africa, near tropical rainforests, but the most recent outbreak in west Africa has involved major urban as well as rural areas.
MERS
Middle East Respiratory Syndrome (MERS) is viral respiratory illness caused by a coronavirus called MERS-CoV primarily affecting seven countries in the Arabian Peninsula. MERS can cause severe acute respiratory illness and its symptoms include fever, cough, and shortness of breath.
H1N1
The 2009 flu pandemic is a global outbreak of a new strain of an influenza A virus subtype H1N1, referred to as the "novel H1N1" first identified in April 2009, and commonly called "swine flu." It is thought to be a reassortment of four known strains of influenza A virus: one endemic in (normally infecting) humans, one endemic in birds, and two endemic in pigs (swine).
The outbreak began in Mexico and in early June, as the virus spread globally, the World Health Organization (WHO) declared the outbreak to be a pandemic. The virus spreading with "unprecedented speed" and many clinics were soon overwhelmed testing and treating patients. The virus typically spreads from coughs and sneezes or by touching contaminated surfaces and then touching the nose or mouth.
Vaccines may soon be available but may be limited and given first to healthcare workers, pregnant women, and other higher risk groups. Two or three injections will be required for maximum immunity from both the swine flu and seasonal flu. There is also concern if the new virus mutates further, it could become more virulent and less susceptible to any new vaccine.
The WHO predicts an "explosion" of swine flu cases during the remainder of 2009 and into 2010. Because the global spread of swine flu will endanger more lives as it speeds up in coming months, they are alerting governments to boost preparations for a swift response. There will soon be a period of further global spread of the virus, and most countries may see swine flu cases double every three to four days for several months until peak transmission is reached. The CDC estimates that as many as 40% of the workforce, in a worst-case scenario, might be unable to work at the peak of the pandemic due to the need for many healthy adults to stay home and care for an ill family member.
Avian Influenza
Viruses are masters of interspecies navigation. Mutating rapidly and often swapping genetic material with other viruses, they can often jump from animals to humans. Avian and human influenza viruses can exchange genes when a person is simultaneously infected with viruses from both the common human influenza virus and the avian type. This process of gene swapping inside the human body can give rise to a completely new type of the influenza virus to which few, if any, humans would have any natural immunity. If the new virus contains sufficient human flu virus genes, transmission directly from person to person can occur.
Since the 1980s, the list of diseases that have jumped directly from animals to people has grown rapidly - hantavirus, SARS, monkeypox and, most recently, avian influenza, commonly called bird flu. Perhaps none of these illnesses has more potential to create widespread harm than bird flu. In people, bird flu usually begins much like conventional influenza, with fever, cough, sore throat and muscle aches, but bird flu can lead to life-threatening complications.
Avian flu has spread from Southeast Asia to China, Russia and now Europe. Human cases of avian influenza have been reported in Thailand and Vietnam. Researchers believe the deadly H5N1 form of bird flu has split into two distinct strains; a development that could make it harder to develop vaccines to stop the spread of the disease.
SARS
In 2003 the Severe Acute Respiratory Syndrome (SARS) virus infected over 8,200 people in 29 countries, resulting in over 700 deaths worldwide. The World Health Organization (WHO) has repeatedly warned that SARS could return and the world must be on the alert for the resurgence of the virus. During the epidemic, SARS spread rapidly by person-to-person contact in hospitals and public transportation hubs, and there was a great need to screen large groups of people for fever, a primary symptom of SARS. Conventional body temperature measurement using oral and ear thermometers, however, were too slow and inconvenient to use for mass screening. A method of fever detection was needed that was fast, accurate, and non-obtrusive and thermal imaging was the technology chosen.
Between April 23 and June 4 of 2003, 30 million travelers were screened using thermal imagers; 9,292 were assessed as having elevated temperatures and were further evaluated, 38 people were suspected as SARS virus carriers, and 21 were finally diagnosed as having SARS.
Studies
Highest Sensitivity and Specificity
The effectiveness of Thermoscreen has been studied and confirmed in the following clinical studies by the U.S. Center of Disease Control and the University of Nebraska Medical Center (UNMC) in Omaha.
Product Comparison
A number of different technologies have been evaluated and used in the past decade for mass fever screening. Below is a comparison of Thermoscreen operation and effectiveness with several of the most common mass fever screening tools.
Fixed-Mount Infrared Cameras
Thermoscreen is included in this category but is distinct from its competition by its unique method of fever screening called Automated Screening. Automated screening is a sophisticated measurement process involving precision calibration, face and movement detection, verbal commands, ambient temperature compensation, and subject group compensation. Together, these unique features provide unparalleled ability to reduce the number of missed detectons and false violations. A low false violation rate allows Thermoscreen to be employed in applications where operators cannot attend to a high number of false positives. Furthermore, automated screening significantly reduces the demands on system operators, enabling them to focus their attention on addressing fever violations.
Hand-Held Infrared Cameras
Thermoscreen has the same advantages over hand-held infrared cameras as over fixed-mount cameras. Hand-held camera however, have other important disadvantages including the following:
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Holding the camera continuously leads to operator fatigue.
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Camera movement (even slight movement) leads to image blur, resulting in inaccurate measurements.
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Inconsistent screening distance between the camera and subject leads to inconsistent screening results.
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Cameras can be easily dropped and damaged.
Infrared Spot Pyrometers
Spot pyrometers are infrared measurement devices that measure the temperature of a single area. In the case of fever screening, this area is typically the forehead. Most spot pyrometers are designed to be used in industrial applications where their accuracy is not sufficient for effective fever screening. Because temperature is measured at a single spot, cooler areas of the skin are averaged with warmer areas, making if difficult to obtain consistent temperature measurements that correlate well with internal core temperature.
Infrared Temporal Scanners
These devices require operator contact with subjects and measure temperature by swiping a hand-held probe over the temporal artery. In order to screen a different subject, a new disposable cap cover must be installed on the probe. Operation of a temporal scanner requires practice and therefore measurement accuracy is influenced by operator skill. Thermoscreen can screen over 1000 subjects per hour, more than 10 times the screening rate of temporal scanners. Additionally, all subjects can usually be screened using a single Thermoscreen system. Studies confirm the importance of using the same instrument when screening subject groups in order to obtain consistent results.