Exploring Facial Thermography Patterns in Women with Chronic Migraine.

(1) Background: Chronic migraine is a debilitating neurological condition affecting millions worldwide. This study delves into the facial point-of-care (POC) thermographic patterns of women with chronic migraine, aiming to shed light on the condition's pathophysiology and diagnostic potential. (2) Methods: Using infrared POC thermography, the facial temperature distribution of 24 female participants with chronic migraine were analyzed. (3) Results: The findings revealed significant temperature asymmetry in women with right-sided unilateral headaches, particularly in the right frontal and temporal regions. Notably, individuals with bilateral pain did not exhibit thermal pattern differences, suggesting potential diagnostic complexities. While these results offer valuable insights, further research with larger samples is warranted (4) Conclusions: Facial thermography holds promise as an adjunctive tool for migraine diagnosis and understanding its neurophysiological basis; however, cautious interpretation is advised, given the need for validation and expanded investigations. Improved diagnostic criteria and treatment strategies may emerge from this ongoing exploration, ultimately enhancing the quality of life of chronic migraine sufferers.

Can Dual Infrared-Visual Thermography Provide a More Reliable Diagnosis of Perforator Veins and Reflux Severity?

The accurate identification of perforator veins (PV) in asymptomatic veins that do not meet the criteria established by venous Doppler (VD) is a complex challenge, considered the gold standard in diagnosis, and is operator-dependent. This study explored the potential of dual infrared-visual thermography (IRVT) to identify PV in 99 patients aged 29 to 80 years. IRVT was conducted using a high-definition hyperspectral visual-infrared sensor. The temperature difference (ΔT) between maximum temperature (Tmax) and minimum temperature (Tmin) within the region of interest (ROI) served as an indicator for assessing vascular dysfunction severity. Comparative analysis was performed with VD results obtained using a Doppler ultrasound unit equipped with a 7.5 MHz linear transducer. Significant statistical differences (p < 0.05) in ΔT (Tmax-Tmin) were observed among PV sites categorized by reflux severity: no reflux (ΔT = 1.2 °C), mild reflux (ΔT = 1.8 °C), moderate reflux (ΔT = 2.9 °C), and severe reflux (ΔT = 3.6 °C). This study concludes that IRVT effectively distinguishes varying degrees of vascular reflux severity. IRVT shows promise as a non-invasive, radiation-free tool to enhance PV identification, especially in challenging cases, potentially improving patient outcomes and healthcare management. Further research is required to validate and refine its diagnostic utility.

Infrared Imaging of the Brain-Eyelid Thermal Tunnel: A Promising Method for Measuring Body Temperature in Afebrile Children.

(1) Infrared thermography of the inner canthus of the eye has emerged as a promising tool for temperature screening and fever diagnosis. Its non-invasive nature lends itself well to mass screening in diverse settings such as schools, public transport, and healthcare facilities. Swift and accurate temperature assessment plays a pivotal role in the early identification of potential fever cases, facilitating timely isolation, testing, and treatment, thereby mitigating the risk of disease transmission. Nonetheless, the reliability of this approach in the pediatric population, especially when compared to conventional thermometry methods, remains unexplored. This preliminary study aimed to evaluate the concordance between the temperature of the inner canthus of the eye (Tic,eye), referred to as the brain-eyelid thermal tunnel (BTT°), with axillary and tympanic methods in afebrile children. (2) Methods: A cohort of 36 children, matched in a 1:1 ratio for gender and age, underwent comprehensive assessments encompassing anthropometric data, blood pressure evaluations, axillary (Tax) and tympanic (Tty) temperature measurements, as well as BTT° infrared thermography. (3) Results: The findings revealed a high level of concordance among the tympanic, axillary, and BTT° measurement methods. Bland-Altman plots showed that the bias was minimal, and no statistically significant differences were observed when comparing BTT° with axillary (p = 0.136) and tympanic (p = 0.268) measurements. Passing-Bablok regression scatter plots further confirmed the agreement, aligning the fitted regression line closely with the identity line for both axillary versus BTT° and tympanic (Tty) versus BTT° comparisons. (4) Conclusions: This study holds significant implications for public health, especially in the context of infectious disease outbreaks such as COVID-19. BTT° infrared thermography of the inner canthus of the eye (Tic,eye) reliably measures body temperature in afebrile children in controlled settings; nevertheless, its practical application necessitates the adaptation of biothermodynamic parameters to accommodate diverse environmental conditions.

Diabetic Foot Assessment and Care: Barriers and Facilitators in a Cross-Sectional Study in Bangalore, India.

(1) Background: This cross-sectional study aims to highlight the assessment and foot care practices in an advanced clinical setting, the clinical characteristics of the patients, and to understand the barriers and facilitators for effective foot care from the perspectives of healthcare practices, resources, and patients' socioeconomic and cultural practices, and other aspects in terms of new technologies for effective foot care such as infrared thermography. (2) Methods: Clinical test data from 158 diabetic patients and a questionnaire to assess the foot care education retention rate were collected at the Karnataka Institute of Endocrinology and Research (KIER) facility. (3) Results: Diabetic foot ulcers (DFUs) were found in 6% of the examined individuals. Male patients were more likely to have diabetes complications, with an odds ratio (OR) of 1.18 (CI = 0.49-2.84). Other diabetes problems raised the likelihood of DFUs by OR 5 (CI = 1.40-17.77). The constraints include socioeconomic position, employment conditions, religious customs, time and cost, and medication non-adherence. The attitude of podiatrists and nurses, diabetic foot education, and awareness protocols and amenities at the facility were all facilitators. (4) Conclusions: Most diabetic foot complications might be avoided with foot care education, regular foot assessments as the standard of treatment, and self-care as a preventive/therapeutic strategy.

Infrared image method for possible COVID-19 detection through febrile and subfebrile people screening.

This study proposed an infrared image-based method for febrile and subfebrile people screening to comply with the society need for alternative, quick response, and effective methods for COVID-19 contagious people screening. The methodology consisted of: (i) Developing a method based on facial infrared imaging for possible COVID-19 early detection in people with and without fever (subfebrile state); (ii) Using 1206 emergency room (ER) patients to develop an algorithm for general application of the method, and (iii) Testing the method and algorithm effectiveness in 2558 cases (RT-qPCR tested for COVID-19) from 227,261 workers evaluations in five different countries. Artificial intelligence was used through a convolutional neural network (CNN) to develop the algorithm that took facial infrared images as input and classified the tested individuals in three groups: fever (high risk), subfebrile (medium risk), and no fever (low risk). The results showed that suspicious and confirmed COVID-19 (+) cases characterized by temperatures below the 37.5 °C fever threshold were identified. Also, average forehead and eye temperatures greater than 37.5 °C were not enough to detect fever similarly to the proposed CNN algorithm. Most RT-qPCR confirmed COVID-19 (+) cases found in the 2558 cases sample (17 cases/89.5%) belonged to the CNN selected subfebrile group. The COVID-19 (+) main risk factor was to be in the subfebrile group, in comparison to age, diabetes, high blood pressure, smoking and others. In sum, the proposed method was shown to be a potentially important new tool for COVID-19 (+) people screening for air travel and public places in general.

Infrared Macrothermoscopy Patterns-A New Category of Dermoscopy.

(1) Background: The authors developed a new non-invasive dermatological infrared macroimaging analysis technique (MacroIR) that evaluates microvascular, inflammatory, and metabolic changes that may be dermoscopy complimentary, by analyzing different skin and mucosal lesions in a combined way-naked eye, polarized light dermatoscopy (PLD), and MacroIR-and comparing results; (2) Methods: ten cases were evaluated using a smartphone coupled with a dermatoscope and a macro lens integrated far-infrared transducer into specific software to capture and organize high-resolution images in different electromagnetic spectra, and then analyzed by a dermatologist; (3) Results: It was possible to identify and compare structures found in two dermoscopic forms. Visual anatomical changes were correlated with MacroIR and aided skin surface dermatological analysis, presenting studied area microvascular, inflammatory, and metabolic data. All MacroIR images correlated with PLD, naked eye examination, and histopathological findings; (4) Conclusion: MacroIR and clinic dermatologist concordance rates were comparable for all dermatological conditions in this study. MacroIR imaging is a promising method that can improve dermatological diseases diagnosis. The observations are preliminary and require further evaluation in larger studies.

Thermography evaluation of low back pain in pregnant women: Cross-sectional study.

BACKGROUND: Low back pain during pregnancy is very common and thermography seems to be a promising method of evaluation for pregnant women, because it is painless and safe. The aim of the present study was to evaluate low back pain, during pregnancy, using thermography together with artificial intelligence. METHODS: A cross-sectional study was carried out with pregnant women recruited from a university hospital. The following data were collected: (a) clinical data; (b) physical assessment with mobility and low back pain provocation tests; and (c) thermograms acquisitions, in a controlled environment. Artificial intelligence and the statistical tests were used to compare the groups' mean: with low back pain (LBP) and without low back pain (WLBP). RESULTS: Thirty pregnant women took part, with fifteen in each group. The mean ± Standard Deviation temperature of the lumbar region in both groups were 32.7 ± 1.05 °C and 32.6 ± 1.01 °C for LBP and WLBP, respectively. There was not any difference in temperature between the groups; however, the artificial intelligence software found thermogram differences between groups; furthermore, the correlation between pain intensity and functionality was found. CONCLUSION: Thermography associated with artificial intelligence analyses demonstrated to be a promising method as an adjunct to clinical evaluation.

Predicting lipoabdominoplasty complications with infrared thermography: a delta-R analysis.

The diagnosis of the main complications resulting from lipoabdominoplasty has not yet been standardized. Infrared thermal imaging has been used to assess possible complications, such as necrosis and changes in micro- and macro-circulation, based on perforator mapping techniques, among others. The objective of this study was to present two clinical cases involving thermal imaging monitoring of the healing process of lipoabdominoplasty in the immediate postoperative evaluation and its preliminary results. Infrared thermography was performed 24 hours after the operation and on postoperative days 5, 25, and 27. In clinical case 1, it was found that the delta-R (∆TR)-defined as the difference in minimum temperature between the highest and lowest points in the SA3 region (caution suction area) following the classification established by Matarasso-was 0.4°C at 24 hours after surgery and decreased to 0.1°C on a postoperative day 5. There were no complications in this case. In contrast, in clinical case 2, the ∆TR was 1.7°C at 24 hours after surgery (upon hospital discharge) and remained high, at 2.2°C, on postoperative day 5. A higher ∆TR was found in the second patient, who developed necrosis of the surgical wound. The ∆TR thermal index may be a new tool for predicting possible complications, complementing the clinical evaluation and therapeutic decision-making.

Emerging evidence for the opposite role of circulating irisin levels and brown adipose tissue activity measured by infrared thermography in anthropometric and metabolic profile during childhood.

Irisin is an adipomyokine that increases browning of adipose tissue and thermogenesis, thereby protecting against obesity and insulin resistance. However, the correlation between irisin, brown adipose tissue (BAT), and childhood obesity, as well as its association with an increased risk of developing metabolic diseases, has not been completely elucidated. This study aimed to investigate the association between irisin levels and BAT activity measured by infrared thermography among children and verify their correlation with anthropometric and metabolic parameters. This study included 42 children with normal weight and 18 overweight/obese children. Anthropometric data, irisin levels, lipid and glucose profile were evaluated. The percentage of the thermally active portion of the supraclavicular area (%AreaSCR) before and after a cold stimulus was measured by infrared thermography, and the differences between the percentages of thermally active (Δ%AreaSCR) was calculated as an index of BAT activation. The results were correlated with anthropometric and metabolic parameters. Circulating irisin levels was positive correlated with age (rho=0.327, P= 0.011), body mass index (BMI) (rho=0.707, P<0.001), waist circumference (rho=0.624, P<0.001), total cholesterol (rho=0.361, P=0.044), triglycerides (rho=0.419, P=0.001), and low-density lipoprotein cholesterol (LDLc) (rho=0.381, P= 0.003). Active BAT was negatively correlated with BMI, waist circumference, triglycerides, LDLc and irisin levels. We observed that normal weight children increased significantly the Δ% AreaSCR as compared to overweight/obese children. In conclusion, circulating irisin levels and BAT activity appear to have opposing roles, since normal weight children had greater BAT activity and lower circulating levels of irisin.

Investigation of thermal changes in the thyroid gland region of individuals with hypothyroidism and fibromyalgia by analyzing the temperature of brown adipose tissue.

This exploratory retrospective study aims to investigate the thermal changes in the thyroid gland region of patients with hypothyroidism and fibromyalgia by analyzing the temperature of the brown adipose tissue (BAT). A total of 166 individuals from 1000 thermographic electronic medical records were classified into four groups: Group HP + FM-50 individuals with hypothyroidism and fibromyalgia; Group FM-56 individuals with fibromyalgia only; Group HP-30 individuals with hypothyroidism only, and Group Control-30 healthy individuals. The thermal images from the electronic medical records were acquired by a FLIR T650SC infrared camera (used for thermometry) and the temperature data for each group were statistically analyzed. Group HP + FM showed r = 0, meaning that the average temperatures of the thyroid and BAT are independent of each other. Groups FM, HP and Control showed r = 1, meaning that the average temperatures of the thyroid and BAT were directly related. Our findings showed that the average temperatures of the thyroid and BAT regions are similar. Also, there was no correlation between thyroid gland temperature and the presence of hypothyroidism or fibromyalgia using thermometry.

Effects of photobiomodulation therapy on neuropathic pain in rats: evaluation of nociceptive mediators and infrared thermography.

Nerve injury induces release of peptides and upregulation of receptors such as substance P and transient receptor potential receptor V1 (TRPV1), which contribute to the development and maintenance of chronic pain. Photobiomodulation therapy (PBMT) is a nonpharmacological strategy that promotes tissue repair and reduces pain and inflammation. However, the molecular basis for PBMT effects on neuropathic pain is still unclear. We investigated the effects of PBMT on substance P, TRPV1, and superficial temperature change in a rodent model of neuropathic pain. We evaluated substance P and TRPV1 in dorsal root ganglia (DRG L4 to L6) at baseline, 14 days after chronic constriction injury (CCI) and after PBMT. We also assessed the superficial temperature of tarsal, metatarsal, tibia, and fibula regions before and after PBMT using infrared thermography. Substance P and TRPV1 levels increased in DRG of CCI rats compared to naive and sham rats and decreased after PBMT. Infrared thermography showed increased temperature of tarsal, metatarsal, tibia, and fibula regions in CCI rats, which was decreased after PBMT. There were no statistical differences between CCI rats with PBMT, sham, and naive rats in any assay. PBMT reduces nociceptive mediators and hind paw and leg's temperature in a rodent model of neuropathic pain, suggesting that PBMT may play a modulatory role in thermoregulation, neurogenic inflammation, and thermal sensitivity in peripheral nerve injuries. Therefore, PBMT appears to be a valuable strategy for neuropathic pain treatment in clinical settings.

Infrared thermography to diagnose and manage venomous animal bites and stings.

INTRODUCTION: Infrared imaging (IR) is a noninvasive technique that quantifies body surface temperature, producing a digital color image. IR has been used to study diseases in which skin temperature can reflect the presence of inflammation. METHODS: This was an observational pilot study of eight patients envenomed by snakes, spiders, and scorpions. All patients were examined using a thermal camera. RESULTS: In all cases, we obtained infrared images that corroborated clinical findings indicating localized effects of venom, specifically inflammation. CONCLUSIONS: IR has potential for use as a research, diagnostic, and monitoring tool for localized effects of animal venoms.

Infrared thermography to diagnose and manage venomous animal bites and stings

Abstract INTRODUCTION Infrared imaging (IR) is a noninvasive technique that quantifies body surface temperature, producing a digital color image. IR has been used to study diseases in which skin temperature can reflect the presence of inflammation. METHODS This was an observational pilot study of eight patients envenomed by snakes, spiders, and scorpions. All patients were examined using a thermal camera. RESULTS In all cases, we obtained infrared images that corroborated clinical findings indicating localized effects of venom, specifically inflammation. CONCLUSIONS IR has potential for use as a research, diagnostic, and monitoring tool for localized effects of animal venoms.

Infrared thermography to diagnose and manage venomous animal bites and stings

Introduction: Infrared imaging (IR) is a noninvasive technique that quantifies body surface temperature, producing a digital color image. IR has been used to study diseases in which skin temperature can reflect the presence of inflammation. Methods: This was an observational pilot study of eight patients envenomed by snakes, spiders, and scorpions. All patients were examined using a thermal camera. Results: In all cases, we obtained infrared images that corroborated clinical findings indicating localized effects of venom, specifically inflammation. Conclusions: IR has potential for use as a research, diagnostic, and monitoring tool for localized effects of animal venoms.

Infrared thermography to evaluate pain in a multiple sclerosis patient. Case report / Termografia por infravermelho na avaliação da dor em paciente com esclerose múltipla Relato de caso

ABSTRACT BACKGROUND AND OBJECTIVES: Multiple sclerosis is an autoimmune, inflammatory, demyelinating and chronic disease of the central nervous system. As from the understanding of its pathophysiology and of thermoregulating dysfunctions caused by the disease, it is clear that, whenever possible, infrared thermography should be done. Thermography helps understanding how the disease affects different body areas, by investigating asymmetries, contractures and neurogenic patterns. This study aimed at documenting by infrared thermography a case of multiple sclerosis in crisis of pain. CASE REPORT: Female patient, 63 years old, diagnosed with multiple sclerosis in 2007 after magnetic resonance and lumbar puncture. Six month ago she started complaining of progressive decrease in lower limbs muscle strength in addition to increased spinal pain, especially in lumbar spine and right hemibody. Patient was submitted to new exams (head and cervical spine resonance), which have shown the same pattern found in previous exams, resulting from old injuries by demyelinating substract. Thermometry has shown asymmetry of the whole right hemiboby with central neurogenic patterns and temperature difference (∆T 0.8ºC), thus confirming initial diagnosis. With regard to major complaint, there was asymmetry between paralumbar regions and presence of lumbar paravertebral hyperradiation, suggesting local muscles contracture. CONCLUSION: Multiple sclerosis has a wide range of symptoms, especially the installation of chronic pain and inadequate thermoregulation, which directly interfere with quality of life of patients.

RESUMO JUSTIFICATIVA E OBJETIVOS: A esclerose múltipla é uma doença autoimune, inflamatória, desmielinizante e crônica do sistema nervoso central. A partir do entendimento da sua fisiopatologia e das disfunções termorreguladoras decorrentes da doença, fica claro que quando possível, a termografia por infravermelho deve ser feita. A termografia facilita o entendimento de como a doença atinge as diversas áreas do corpo, investigando assimetrias, contraturas e padrões neurogênicos. O objetivo deste estudo foi documentar por termografia infravermelha um caso de esclerose múltipla em crise álgica. RELATO DO CASO: Paciente do gênero feminino, 63 anos, diagnosticada com esclerose múltipla em 2007, após realização de ressonância magnética e punção liquórica. Ha seis meses começou a queixar-se de diminuição de força muscular nos membros inferiores de caráter progressivo, além de aumento nas dores da região da coluna vertebral, principalmente na coluna lombar e no dimídio direito. Realizou novos exames (ressonância de crânio e coluna cervical), que mostraram o mesmo padrão encontrado em exames anteriores, resultantes de lesões antigas por substrato desmielinizante. A termometria demonstrou assimetria de todo hemicorpo direito, com padrão neurogênico central, e diferença de temperatura (∆T 0,8ºC), confirmando assim o diagnostico inicial. Em relação à queixa principal, foram encontradas assimetria entre regiões paralombares e presença de hiper-radiação paravertebral lombar, sugerindo contratura da musculatura local. CONCLUSÃO: A esclerose múltipla possui vastos sintomas, destacando-se aqui a instalação de quadros álgicos crônicos e termorregulação inadequada que interferem diretamente na qualidade de vida de seus portadores.

Laser acupuncture causes thermal changes in small intestine meridian pathway.

The acupuncture meridians represent the flow of corporal energy which contains the acupuncture points. Laser acupuncture is a form of acupuncture stimulation by the use of laser. Thermographic images represent the propagation of heat in micro-environmental systems. The objective of this study was to investigate the use of thermographic images to document the changes on the small intestine meridian (S.I.M.) when submitted to laser acupuncture. Another important issue regards to the analysis of the flow direction if it is upward when stimulated by acupuncture points. For the execution of this work, a laser acupuncture pen was used in points of the meridian in the S.I.M. Two healthy male volunteers were selected (18 and 60 years old, respectively), and doses of 576,92 J/cm2 with low-power infrared laser equipment with a wavelength of 780 nm in the SI.3 and SI.19 points were applied. An infrared thermal camera was used to measure the temperature of the S.I.M. during the 6 min laser acupuncture pen stimulus. When the laser acupuncture of both volunteers was conducted in the SI.3 point, it presented hyper-radiation of the hemi face in the same side, far from the application site. When this was applied in the SI.19 point, hyper-radiation in the same point and temperature lowering at the end of the meridian were observed. The laser energy caused thermal changes along the path of the S.I.M., distal, and proximal at the same time, proving the existence of the S.I.M.

Using thermography for an obstruction of the lower lacrimal system.

Obstructions in the lacrimal pathways quite often require accurate and reliable image scanning for confirmation and documentation. Infrared thermal imaging, known as thermography, is a resource that complements diagnosis; it does not require touching the patient or applying contrast materials and has been used in various medical procedures for decades. However, there have been few studies in the literature about its use in ophthalmology. In this paper, the authors have presented a case of dacryocystitis where the obstruction of the lacrimal punctum was so acute that conventional dacryocystography could not be used. The authors have successfully reported the use of thermography as a complementary propaedeutic and will discuss the method they used.

Using thermography for an obstruction of the lower lacrimal system / Utilização da termografia de uma obstrução da via lacrimal baixa

ABSTRACT Obstructions in the lacrimal pathways quite often require accurate and reliable image scanning for confirmation and documentation. Infrared thermal imaging, known as thermography, is a resource that complements diagnosis; it does not require touching the patient or applying contrast materials and has been used in various medical procedures for decades. However, there have been few studies in the literature about its use in ophthalmology. In this paper, the authors have presented a case of dacryocystitis where the obstruction of the lacrimal punctum was so acute that conventional dacryocystography could not be used. The authors have successfully reported the use of thermography as a complementary propaedeutic and will discuss the method they used.

RESUMO As obstruções de vias lacrimais muitas vezes necessitam de exames de imagem precisos e confiáveis para confirmação e documentação diagnóstica. A imagem térmica por infravermelho, conhecida como termografia, é um recurso complementar diagnóstico sem contato e sem contraste, utilizada há décadas em diversas aplicações médicas. Porém, ainda são poucos os estudos na literatura sobre seu uso na oftalmologia. Neste trabalho os autores apresentam um caso de dacriocistite com obstrução dos pontos lacrimais onde não foi possível utilizar a técnica convencional de dacrioscistografia relatando o uso com sucesso da termografia como propedêutica complementar e discutem o método.

Reference breast temperature: proposal of an equation / Temperatura de referência das mamas: proposta de uma equação

ABSTRACT Objective To develop an equation to estimate the breast reference temperature according to the variation of room and core body temperatures. Methods Four asymptomatic women were evaluated for three consecutive menstrual cycles. Using thermography, the temperature of breasts and eyes was measured as indirect reference of core body and room temperatures. To analyze the thermal behavior of the breasts during the cycle, the core body and room temperatures were normalized by means of a mathematical equation. Results We performed 180 observations and the core temperature had the highest correlation with the breast temperature, followed by room temperature. The proposed prediction model could explain 45.3% of the breast temperature variation, with variable room temperature variable; it can be accepted as a way to estimate the reference breast temperature at different room temperatures. Conclusion The average breast temperature in healthy women had a direct relation with the core and room temperature and can be estimated mathematically. It is suggested that an equation could be used in clinical practice to estimate the normal breast reference temperature in young women, regardless of the day of the cycle, therefore assisting in evaluation of anatomical studies.

RESUMO Objetivo Desenvolver uma equação de estimativa da temperatura de referência das mamas, de acordo com a variação das temperaturas ambiente e central. Métodos Foram avaliadas quatro mulheres assintomáticas durante três ciclos menstruais consecutivos. Mensuraram-se, por termografia, as temperaturas das mamas e ocular, como referência indireta das temperaturas central e ambiente. Para análise do comportamento térmico durante o ciclo as temperaturas das mamas, foram normalizadas com a temperatura central e ambiente por meio de uma equação matemática. Resultados Foram realizadas 180 observações, sendo que a temperatura central apresentou a maior correlação com a temperatura das mamas, seguida da temperatura ambiente. O modelo de predição proposto conseguiu explicar 45,3% da variação da temperatura das mamas com temperatura ambiente variável podendo ser aceito como uma forma de estimar a temperatura de referência das mesmas em diferentes temperaturas ambientais. Conclusão A temperatura média das mamas em mulheres saudáveis teve relação direta com a temperatura central e ambiente, e pôde ser estimada matematicamente. Sugere-se que uma equação poderia ser utilizada para estimativa da temperatura de referência da mama normal em mulheres, independente do dia do ciclo e, portanto, auxiliar na avaliação de estudos anatômicos.

Reference breast temperature: proposal of an equation.

OBJECTIVE: To develop an equation to estimate the breast reference temperature according to the variation of room and core body temperatures. METHODS: Four asymptomatic women were evaluated for three consecutive menstrual cycles. Using thermography, the temperature of breasts and eyes was measured as indirect reference of core body and room temperatures. To analyze the thermal behavior of the breasts during the cycle, the core body and room temperatures were normalized by means of a mathematical equation. RESULTS: We performed 180 observations and the core temperature had the highest correlation with the breast temperature, followed by room temperature. The proposed prediction model could explain 45.3% of the breast temperature variation, with variable room temperature variable; it can be accepted as a way to estimate the reference breast temperature at different room temperatures. CONCLUSION: The average breast temperature in healthy women had a direct relation with the core and room temperature and can be estimated mathematically. It is suggested that an equation could be used in clinical practice to estimate the normal breast reference temperature in young women, regardless of the day of the cycle, therefore assisting in evaluation of anatomical studies.