Infrared Thermal Mapping, Analysis and Interpretation in Biomedicine

Selvan, Arul; Childs, Charmaine

doi:10.1007/978-981-10-3147-2_21

Cited by 4 publications

(5 citation statements)

References 32 publications

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“…Hierarchical clustering-based segmentation (HCS) is one such method of identifying features within IRT images that can be quite noisy. 37 The advantage of this process compared to other segmentation algorithms is that HCS employs a hierarchy of thresholding rather than a single threshold value when identifying boundaries of regions of interests within IRT images. 37 This minimizes the loss of useful data during the processing stage of IRT images.…”

Section: Introductionmentioning

confidence: 99%

“… 37 The advantage of this process compared to other segmentation algorithms is that HCS employs a hierarchy of thresholding rather than a single threshold value when identifying boundaries of regions of interests within IRT images. 37 This minimizes the loss of useful data during the processing stage of IRT images. HCS is a versatile segmentation process that can be applied to IRT images from a wide variety of sources with minimal tuning.…”

Section: Introductionmentioning

confidence: 99%

“…HCS is a versatile segmentation process that can be applied to IRT images from a wide variety of sources with minimal tuning. 37 – 39 Examples include organic materials like plants in the environment and variations in body temperature postsurgery or inorganic cases such as differentiating different types of window materials using IRT imaging. To extract a temperature from processed infrared data, the physiological target radiation must be isolated from total radiation received by the camera, which also includes radiation from the atmosphere and surroundings.…”

Section: Introductionmentioning

confidence: 99%

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Review of the efficacy of infrared thermography for screening infectious diseases with applications to COVID-19

et al. 2021

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. Purpose: The recent coronavirus disease 2019 (COVID-19) pandemic, which spread across the globe in a very short period of time, revealed that the transmission control of disease is a crucial step to prevent an outbreak and effective screening for viral infectious diseases is necessary. Since the severe acute respiratory syndrome (SARS) outbreak in 2003, infrared thermography (IRT) has been considered a gold standard method for screening febrile individuals at the time of pandemics. The objective of this review is to evaluate the efficacy of IRT for screening infectious diseases with specific applications to COVID-19. Approach: A literature review was performed in Google Scholar, PubMed, and ScienceDirect to search for studies evaluating IRT screening from 2002 to present using relevant keywords. Additional literature searches were done to evaluate IRT in comparison to traditional core body temperature measurements and assess the benefits of measuring additional vital signs for infectious disease screening. Results: Studies have reported on the unreliability of IRT due to poor sensitivity and specificity in detecting true core body temperature and its inability to identify asymptomatic carriers. Airport mass screening using IRT was conducted during occurrences of SARS, Dengue, Swine Flu, and Ebola with reported sensitivities as low as zero. Other studies reported that screening other vital signs such as heart and respiratory rates can lead to more robust methods for early infection detection. Conclusions: Studies evaluating IRT showed varied results in its efficacy for screening infectious diseases. This suggests the need to assess additional physiological parameters to increase the sensitivity and specificity of non-invasive biosensors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Review of the efficacy of infrared thermography for screening infectious diseases with applications to COVID-19

et al. 2021

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“…Camera proprietary tools were used for quantitative analysis of temperature values, reported as mean values of wound site, mean of reference site (healthy abdominal skin) and temperature difference (reference minus wound). Hierarchical clustering-based segmentation of boundary regions were performed using techniques of Selvan [ 62 ]. Subtle variations in temperature clusters at wound and reference sites were observed.…”

Section: Resultsmentioning

confidence: 99%

Abdominal Cutaneous Thermography and Perfusion Mapping after Caesarean Section: A Scoping Review

Childs

Soltani

2020

IJERPH

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Introduction: Caesarean section (CS) is the most prevalent surgical procedure in women. The incidence of surgical site infection (SSI) after CS remains high but recent observations of CS wounds using infrared thermography has shown promise for the technique in SSI prognosis. Although thermography is recognised as a ‘surrogate’ of skin perfusion, little is known of the relationship between skin temperature and skin perfusion in the context of wound healing. Aim: To assess the extent of literature regarding the application of infrared thermography and mapping of abdominal cutaneous perfusion after CS. Methods: Wide eligibility criteria were used to capture all relevant studies of any design, published in English, and addressing thermal imaging or skin perfusion mapping of the abdominal wall. The CINAHL and MEDLINE databases were searched, with two independent reviewers screening the title and abstracts of all identified citations, followed by full-text screening of relevant studies. Data extraction from included studies was undertaken using a pre-specified data extraction chart. Data were tabulated and synthesised in narrative format. Results: From 83 citations identified, 18 studies were considered relevant. With three additional studies identified from the reference lists, 21 studies were screened via full text. None of the studies reported thermal imaging and cutaneous perfusion patterns of the anterior abdominal wall. However, two observational studies partially met the inclusion criteria. The first explored analysis methodologies to ‘interrogate’ the abdominal thermal map. A specific thermal signature (‘cold spots’) was identified as an early ‘flag’ for SSI risk. A second study, by the same authors, focusing on obesity (a known risk factor for SSI after CS) showed that a 1 °C lower abdominal skin temperature led to a 3-fold odds of SSI. Conclusion: There is a significant gap in knowledge on how to forewarn of wound complications after CS. By utilising the known association between skin temperature and blood flow, thermographic assessment of the wound and adjacent thermal territories has potential as a non-invasive, independent, imaging option with which to identify tissue ‘at risk’. By identifying skin ‘hot’ or ‘cold’ spots, commensurate with high or low blood flow regions, there is potential to shed light on the underlying mechanisms leading to infective and non-infective wound complications.

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“…These findings suggest a relationship between the measurement of skin temperature and pain assessment. Therefore, this may be a good option in FM population because thermography is conducted with a portable camera that requires no contact with the individual [ 23 ], is non-ionizing [ 24 ] and non-invasive [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal imaging ruled out as a supplementary assessment in patients with fibromyalgia: A cross-sectional study

et al. 2021

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Background The diagnosis of fibromyalgia syndrome (FMS) syndrome is often complicated and relies on diagnostic criteria based mostly on the symptoms reported by patients. Implementing objective complementary tests would be desirable to better characterize this population. Objective The purpose of this cross-sectional study was to compare the skin temperature at rest using thermography in women with FMS and healthy women. Methods Eighty-six women with FMS and 92 healthy controls volunteered to participate. The temperature of all participants was measured by infra-red thermography, registering the skin surface temperature (minimum, maximum and average) at rest in different areas: neck, upper and lower back, chest, knees and elbows. In order to analyze the differences in the skin temperature between groups, inferential analyses of the data were performed using Mann-Whitney U test. Results The results showed no significant difference in skin temperature between groups in the neck, upper back, chest and elbows (p>0.05). The lower back and knees areas showed significant differences between groups (p<0.05), although these differences did not reach a minimum of clinically detectable change. Conclusions Women with fibromyalgia presented no clinically meaningful reduction or difference in skin temperature at rest when compared with a group of healthy women. The infra-red thermography is not an effective supplementary assessment tool in women with fibromyalgia.

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Infrared Thermal Mapping, Analysis and Interpretation in Biomedicine

Cited by 4 publications

References 32 publications

Review of the efficacy of infrared thermography for screening infectious diseases with applications to COVID-19

Review of the efficacy of infrared thermography for screening infectious diseases with applications to COVID-19

Abdominal Cutaneous Thermography and Perfusion Mapping after Caesarean Section: A Scoping Review

Thermal imaging ruled out as a supplementary assessment in patients with fibromyalgia: A cross-sectional study

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