Standardizing test methods for performance evaluation of infrared thermographs intended for fever screening  (Conference Presentation)

Pejhman Ghassemi; T. Joshua Pfefer; Jon P. Casamento; Quanzeng Wang

doi:10.1117/12.2513544

4 March 2019 Standardizing test methods for performance evaluation of infrared thermographs intended for fever screening (Conference Presentation)

Pejhman Ghassemi, T. Joshua Pfefer, Jon P. Casamento, Quanzeng Wang

Author Affiliations +

Proceedings Volume 10870, Design and Quality for Biomedical Technologies XII; 1087009 (2019) https://doi.org/10.1117/12.2513544
Event: SPIE BiOS, 2019, San Francisco, California, United States

Abstract

Infrared thermographs (IRTs) have been implemented for mass fever screening in public areas such as airports during outbreaks of infectious disease pandemics such as Ebola virus disease, yet the approach has not been entirely successful. There has been increasing evidence in the literature that IRTs can provide greater accuracy in estimating core body temperature, if qualified systems are used and appropriate procedures are consistently applied. In this study, we addressed the issue of system qualification by implementing and evaluating a battery of test methods for objective and quantitative performance assessment of two commercial IRTs based on a recent international standard (IEC 80601-2-59). We evaluated stability and drift, image uniformity, minimum resolvable temperature difference, and measurement accuracy of the IRTs and illustrated how experimental and data processing procedures affect results. For instance, we demonstrated that offset temperature compensation, achieved using an external blackbody, is essential to meet the standard’s recommendations for temperature drift and stability. Additionally, we identified methods that can be implemented to optimize IRT evaluation. As an example, we identified a less burdensome approach to characterize image uniformity with a single image acquisition of a uniform blackbody. Overall, the insights into thermograph standardization and acquisition methods provided by this study may improve the utility of this technology and aid in comparing IRT performance, thus improving the potential for high quality disease pandemic countermeasures.

Conference Presentation

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Pejhman Ghassemi, T. Joshua Pfefer, Jon P. Casamento, and Quanzeng Wang "Standardizing test methods for performance evaluation of infrared thermographs intended for fever screening (Conference Presentation)", Proc. SPIE 10870, Design and Quality for Biomedical Technologies XII, 1087009 (4 March 2019); https://doi.org/10.1117/12.2513544

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KEYWORDS

Infrared radiation

Black bodies

Body temperature

Data processing

Image acquisition

Minimum resolvable temperature difference

Standards development

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