Mass screening of suspected febrile patients with remote-sensing infrared thermography: Alarm temperature and optimal distance

Ming Fu Chiang, Po Wei Lin, Li Fong Lin, Hung Yi Chiou, Ching Wen Chien, Shu Fen Chu, Wen Ta Chiu

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Background/Purpose: Detection of fever has become an essential step in identifying patients who may have severe acute respiratory syndrome (SARS) or avian influenza. This study evaluated infrared thermography (IRT) and compared the influence of different imagers, ambient temperature discrepancy, and the distance between the subject and imager. Methods: IRT-digital infrared thermal imaging (IRT-DITI), thermoguard, and ear drum IRT were used for visitors to Municipal Wang Fang Hospital, Taipei, Taiwan. The McNemar and χ2 test, standard Pearson correlation, ANOVA, intraclass correlation coefficient (ICC), and receiver operating characteristic curve (ROC) analysis were used to calculate the alarm temperature for each imager. Results: A total of 1032 subjects were recruited. Different distances and ambient temperature discrepancy had a significant influence on thermoguard, and lateral and frontal view DITI By ICC analysis, a significant difference was found at 10 m distance between ear drum IRT and thermoguard (r=0.45), lateral view DITI (r=0.37), and frontal view DITI (r=0.44). With ROC analysis, the optimal preset cut-off temperatures for the different imagers were: 36.05°C for thermoguard (area under the curve [AUC], 0.716), 36.25°C for lateral view DITI (AUC, 0.801), and 36.25°C for frontal view DITI (AUC, 0.812). Conclusion: The temperature readings obtained by IRT may be used as a proxy for core temperature. An effective IRT system with a strict operating protocol can be rapidly implemented at the entrance of a hospital during SARS or avian influenza epidemics.

Original languageEnglish
Pages (from-to)937-944
Number of pages8
JournalJournal of the Formosan Medical Association = Taiwan yi zhi
Volume107
Issue number12
DOIs
Publication statusPublished - Dec 2008

Fingerprint

Mass Screening
Fever
Temperature
Area Under Curve
Severe Acute Respiratory Syndrome
Influenza in Birds
ROC Curve
Ear
Proxy
Taiwan
Reading
Analysis of Variance
Hot Temperature

Keywords

  • Avian influenza
  • Infrared thermography
  • Intraclass correlation coefficient
  • Receiver operating characteristic curve
  • Severe acute respiratory syndrome

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Mass screening of suspected febrile patients with remote-sensing infrared thermography : Alarm temperature and optimal distance. / Chiang, Ming Fu; Lin, Po Wei; Lin, Li Fong; Chiou, Hung Yi; Chien, Ching Wen; Chu, Shu Fen; Chiu, Wen Ta.

In: Journal of the Formosan Medical Association = Taiwan yi zhi, Vol. 107, No. 12, 12.2008, p. 937-944.

Research output: Contribution to journalArticle

@article{565e680bf40e41dc899162bf2fd79101,
title = "Mass screening of suspected febrile patients with remote-sensing infrared thermography: Alarm temperature and optimal distance",
abstract = "Background/Purpose: Detection of fever has become an essential step in identifying patients who may have severe acute respiratory syndrome (SARS) or avian influenza. This study evaluated infrared thermography (IRT) and compared the influence of different imagers, ambient temperature discrepancy, and the distance between the subject and imager. Methods: IRT-digital infrared thermal imaging (IRT-DITI), thermoguard, and ear drum IRT were used for visitors to Municipal Wang Fang Hospital, Taipei, Taiwan. The McNemar and χ2 test, standard Pearson correlation, ANOVA, intraclass correlation coefficient (ICC), and receiver operating characteristic curve (ROC) analysis were used to calculate the alarm temperature for each imager. Results: A total of 1032 subjects were recruited. Different distances and ambient temperature discrepancy had a significant influence on thermoguard, and lateral and frontal view DITI By ICC analysis, a significant difference was found at 10 m distance between ear drum IRT and thermoguard (r=0.45), lateral view DITI (r=0.37), and frontal view DITI (r=0.44). With ROC analysis, the optimal preset cut-off temperatures for the different imagers were: 36.05°C for thermoguard (area under the curve [AUC], 0.716), 36.25°C for lateral view DITI (AUC, 0.801), and 36.25°C for frontal view DITI (AUC, 0.812). Conclusion: The temperature readings obtained by IRT may be used as a proxy for core temperature. An effective IRT system with a strict operating protocol can be rapidly implemented at the entrance of a hospital during SARS or avian influenza epidemics.",
keywords = "Avian influenza, Infrared thermography, Intraclass correlation coefficient, Receiver operating characteristic curve, Severe acute respiratory syndrome",
author = "Chiang, {Ming Fu} and Lin, {Po Wei} and Lin, {Li Fong} and Chiou, {Hung Yi} and Chien, {Ching Wen} and Chu, {Shu Fen} and Chiu, {Wen Ta}",
year = "2008",
month = "12",
doi = "10.1016/S0929-6646(09)60017-6",
language = "English",
volume = "107",
pages = "937--944",
journal = "Journal of the Formosan Medical Association",
issn = "0929-6646",
publisher = "Elsevier Science Publishers B.V.",
number = "12",

}

TY - JOUR

T1 - Mass screening of suspected febrile patients with remote-sensing infrared thermography

T2 - Alarm temperature and optimal distance

AU - Chiang, Ming Fu

AU - Lin, Po Wei

AU - Lin, Li Fong

AU - Chiou, Hung Yi

AU - Chien, Ching Wen

AU - Chu, Shu Fen

AU - Chiu, Wen Ta

PY - 2008/12

Y1 - 2008/12

N2 - Background/Purpose: Detection of fever has become an essential step in identifying patients who may have severe acute respiratory syndrome (SARS) or avian influenza. This study evaluated infrared thermography (IRT) and compared the influence of different imagers, ambient temperature discrepancy, and the distance between the subject and imager. Methods: IRT-digital infrared thermal imaging (IRT-DITI), thermoguard, and ear drum IRT were used for visitors to Municipal Wang Fang Hospital, Taipei, Taiwan. The McNemar and χ2 test, standard Pearson correlation, ANOVA, intraclass correlation coefficient (ICC), and receiver operating characteristic curve (ROC) analysis were used to calculate the alarm temperature for each imager. Results: A total of 1032 subjects were recruited. Different distances and ambient temperature discrepancy had a significant influence on thermoguard, and lateral and frontal view DITI By ICC analysis, a significant difference was found at 10 m distance between ear drum IRT and thermoguard (r=0.45), lateral view DITI (r=0.37), and frontal view DITI (r=0.44). With ROC analysis, the optimal preset cut-off temperatures for the different imagers were: 36.05°C for thermoguard (area under the curve [AUC], 0.716), 36.25°C for lateral view DITI (AUC, 0.801), and 36.25°C for frontal view DITI (AUC, 0.812). Conclusion: The temperature readings obtained by IRT may be used as a proxy for core temperature. An effective IRT system with a strict operating protocol can be rapidly implemented at the entrance of a hospital during SARS or avian influenza epidemics.

AB - Background/Purpose: Detection of fever has become an essential step in identifying patients who may have severe acute respiratory syndrome (SARS) or avian influenza. This study evaluated infrared thermography (IRT) and compared the influence of different imagers, ambient temperature discrepancy, and the distance between the subject and imager. Methods: IRT-digital infrared thermal imaging (IRT-DITI), thermoguard, and ear drum IRT were used for visitors to Municipal Wang Fang Hospital, Taipei, Taiwan. The McNemar and χ2 test, standard Pearson correlation, ANOVA, intraclass correlation coefficient (ICC), and receiver operating characteristic curve (ROC) analysis were used to calculate the alarm temperature for each imager. Results: A total of 1032 subjects were recruited. Different distances and ambient temperature discrepancy had a significant influence on thermoguard, and lateral and frontal view DITI By ICC analysis, a significant difference was found at 10 m distance between ear drum IRT and thermoguard (r=0.45), lateral view DITI (r=0.37), and frontal view DITI (r=0.44). With ROC analysis, the optimal preset cut-off temperatures for the different imagers were: 36.05°C for thermoguard (area under the curve [AUC], 0.716), 36.25°C for lateral view DITI (AUC, 0.801), and 36.25°C for frontal view DITI (AUC, 0.812). Conclusion: The temperature readings obtained by IRT may be used as a proxy for core temperature. An effective IRT system with a strict operating protocol can be rapidly implemented at the entrance of a hospital during SARS or avian influenza epidemics.

KW - Avian influenza

KW - Infrared thermography

KW - Intraclass correlation coefficient

KW - Receiver operating characteristic curve

KW - Severe acute respiratory syndrome

UR - http://www.scopus.com/inward/record.url?scp=59149089907&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=59149089907&partnerID=8YFLogxK

U2 - 10.1016/S0929-6646(09)60017-6

DO - 10.1016/S0929-6646(09)60017-6

M3 - Article

C2 - 19129054

AN - SCOPUS:59149089907

VL - 107

SP - 937

EP - 944

JO - Journal of the Formosan Medical Association

JF - Journal of the Formosan Medical Association

SN - 0929-6646

IS - 12

ER -