253 results on '"Thermographic imaging"'
Search Results
52. Thermographic imaging for early detection of biocolonization on buildings
- Author
-
Fany Reffuveille, Kamel Mouhoubi, Stéphanie Eyssautier-Chuine, Jean-Luc Bodnar, Groupe d'Étude sur les Géomatériaux et Environnements Naturels, Anthropiques et Archéologiques - EA 3795 (GEGENAA), Université de Reims Champagne-Ardenne (URCA)-SFR Condorcet, Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Maison des Sciences Humaines de Champagne-Ardenne (MSH-URCA), Université de Reims Champagne-Ardenne (URCA)-Université de Reims Champagne-Ardenne (URCA), Institut de Thermique, Mécanique, Matériaux (ITheMM), Université de Reims Champagne-Ardenne (URCA), Biomatériaux et inflammation en site osseux - EA 4691 (BIOS), Université de Reims Champagne-Ardenne (URCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-SFR CAP Santé (Champagne-Ardenne Picardie Santé), Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV), and EYSSAUTIER, Stéphanie
- Subjects
Materials science ,[SPI] Engineering Sciences [physics] ,0211 other engineering and technologies ,detection ,stone building ,Early detection ,Nanotechnology ,02 engineering and technology ,Building and Construction ,010501 environmental sciences ,Substrate (biology) ,biochemical phenomena, metabolism, and nutrition ,01 natural sciences ,biofilm ,[SPI]Engineering Sciences [physics] ,Thermographic imaging ,Infrared thermography ,021108 energy ,Historical heritage ,0105 earth and related environmental sciences ,Civil and Structural Engineering - Abstract
International audience; Biofilms developed on historical heritage buildings are made of various microbial communities settled and anchored in a substrate. They provide a good medium to the development of macroscopic vegetation which causes irreversible and physical damage to stone structure. Infrared thermography (IRT) measurements have been performed in laboratory scale to investigate the applicability of this non-destructive technique to an early detection of microbial biofilms on stone surface. Detecting biofilms before stone soiling is important in Cultural Heritage conservation to avoid both irreversible damage and building restoration costs.Active IRT was set up on a French limestone used in many French buildings and monuments. Samples were collected after six-months of exposure in an outdoor biofouling test during which they were colonized by microbial biofilms. They have been compared with controls with no biofilm. Experimental set-up has been carried out in dry and damp conditions to simulate different climatic conditions. First results displayed a different thermal response: stone surfaces with biofilm reached higher temperatures and they cooled down faster than row stones. Biofilm entailed a change of the stone thermal behaviour similar to a monolayer. IRT detected biofilm with a better efficiency in dry than in damp condition.
- Published
- 2020
53. Predictive diagnosis of peripheral neuropathy and foot deformity in diabetics using plantar thermographic imaging
- Author
-
Benites-Castillo S, Rodríguez-Alonso D, and Cabrejo-Paredes J
- Subjects
medicine.medical_specialty ,Peripheral neuropathy ,business.industry ,Thermographic imaging ,medicine ,Radiology ,medicine.disease ,business ,Foot deformity - Published
- 2020
54. Estimation of Masonry Texture and Mechanical Characteristics by Means of Thermographic Images
- Author
-
Gianluca Vinti, Vittorio Gusella, and Federico Cluni
- Subjects
Materials science ,business.industry ,law ,Thermographic imaging ,Thermography ,Structural engineering ,Boundary value problem ,Masonry ,business ,Thermographic camera ,Homogenization (chemistry) ,law.invention - Abstract
In the present paper, mechanical characteristics of masonry wall covered with plaster are estimated by means of thermography. Masonry wall samples have been purposely built with different textures: periodic, quasi-periodic and random. All the samples are covered with plaster. By means of a thermographic camera, images have been taken and the texture have been estimated and compared to the exact ones. The elastic characteristics have been estimated by means of homogenization, imposing boundary conditions in terms of displacements and forces. The effect of different parameters involved in the response has been evaluated.
- Published
- 2020
55. Use of ultrasonic scalpel and monopolar electrocautery for skin incisions in neck dissection: a prospective randomized trial
- Author
-
Kai Goppold, Daniel Schneider, Peer W. Kaemmerer, Reinhard Bschorer, Gerhard Schoen, and Michael Woehlke
- Subjects
Male ,medicine.medical_specialty ,Bleeding Time ,medicine.medical_treatment ,Dermatologic Surgical Procedures ,Operative Time ,law.invention ,Necrosis ,03 medical and health sciences ,0302 clinical medicine ,Randomized controlled trial ,Ultrasonic Surgical Procedures ,law ,Bleeding time ,Surgical Wound Dehiscence ,Thermographic imaging ,Electrocoagulation ,medicine ,Humans ,Surgical Wound Infection ,Ultrasonics ,Prospective randomized study ,Prospective Studies ,030223 otorhinolaryngology ,Aged ,Skin ,Pain, Postoperative ,medicine.diagnostic_test ,business.industry ,Significant difference ,Soft tissue ,Neck dissection ,Middle Aged ,Plastic Surgery Procedures ,Surgical Instruments ,Surgery ,Otorhinolaryngology ,Thermography ,030220 oncology & carcinogenesis ,Oral and maxillofacial surgery ,Neck Dissection ,Oral Surgery ,business ,Neck - Abstract
Ultrasonic scalpel (UC) and monopolar electrocautery (ME) are standard equipment for soft tissue surgery. The aim of the present study was to compare intraoperative and postoperative patterns of patients using either UC or ME for skin incisions in neck dissection. In a prospective randomized study of 30 patients, the thermal effects of UC (n = 15) and ME (n = 15) were examined using real-time infrared thermographic imaging. Additionally, tissue damage was evaluated histopathologically. The other measured variables were operation and bleeding time, postoperative pain score (only neck incision area), in-patient time, and complications. UC significantly reduces the thermal effects, compared to ME (p
- Published
- 2018
56. Blueberry bruise detection by pulsed thermographic imaging
- Author
-
Changying Li, Yu Jiang, and Jesse Kuzy
- Subjects
04 agricultural and veterinary sciences ,Horticulture ,Linear discriminant analysis ,040401 food science ,040501 horticulture ,Random forest ,Bruise ,Support vector machine ,0404 agricultural biotechnology ,Statistics ,Thermography ,Thermographic imaging ,Postharvest ,medicine ,medicine.symptom ,0405 other agricultural sciences ,Agronomy and Crop Science ,Food Science ,Mathematics - Abstract
Blueberries are prone to internal bruising damage during harvesting and postharvest handling. Accurate assessment of bruising damage improves profitability by allowing allocation of berries to appropriate product streams. The goal of this study was to develop a pulsed thermographic imaging system and explore its feasibility in non-destructively detecting bruised blueberries. In this paper, the design and construction of a pulsed thermographic imaging system was described. A total of 200 blueberry fruit samples from two southern highbush cultivars (Farthing and Meadowlark) were collected and bruising treatments were applied to half of the samples. Relevant features were extracted and were demonstrated to be significantly different between healthy and bruised fruit. Classification was performed using linear discriminant analysis, support vector machine, random forest, k-nearest-neighbors, and logistic regression classifiers. Accuracies of up to 88% and 79% were obtained for Farthing and Meadowlark berries, respectively. These results demonstrate the feasibility of pulsed thermography to discriminate between bruised and healthy blueberries.
- Published
- 2018
57. Assessment of lower extremity ischemia using smartphone thermographic imaging
- Author
-
Marius Saines and Peter H. Lin
- Subjects
Innovative technique ,lcsh:Diseases of the circulatory (Cardiovascular) system ,lcsh:Surgery ,030204 cardiovascular system & hematology ,03 medical and health sciences ,0302 clinical medicine ,Thermographic imaging ,Humans ,Medicine ,Lower extremity ischemia ,medicine.diagnostic_test ,business.industry ,Ultrasound ,lcsh:RD1-811 ,Blood pressure ,medicine.anatomical_structure ,Thermography ,lcsh:RC666-701 ,030220 oncology & carcinogenesis ,Angiography ,Surgery ,Ankle ,Cardiology and Cardiovascular Medicine ,Nuclear medicine ,business ,Perfusion - Abstract
Conventional diagnostic modalities for assessing arterial circulation or tissue perfusion include blood pressure measurement, ultrasound evaluation, and contrast-based angiographic assessment. An infrared thermal camera can detect infrared radiation energy from the human body, which generates a thermographic image to allow tissue perfusion analysis. We describe a smartphone-based miniature thermal imaging system that can be used as an adjunctive imaging modality to assess tissue perfusion. This smartphone-based camera device is noninvasive, simple to use, and cost-effective in assessing patients with lower extremity tissue perfusion. Assessment of patients with lower extremity arterial ischemia can be performed by a variety of diagnostic modalities, including ankle-brachial index, absolute systolic ankle or toe pressure, transcutaneous oximetry, arterial Doppler waveform, arterial duplex ultrasound, computed tomography scan, arterial angiography, and thermal imaging. We herein describe a noninvasive imaging modality using smartphone-based infrared thermography.
- Published
- 2017
58. Thermographic imaging in myocardial protection: Is it feasible?
- Author
-
Ignazio Condello
- Subjects
medicine.medical_specialty ,business.industry ,Thermographic imaging ,medicine ,MEDLINE ,Surgery ,Radiology ,Cardiology and Cardiovascular Medicine ,business - Published
- 2020
59. Stochastic inverse thermographic characterization of sub-pixel sized through cracks
- Author
-
Earls, C.J.
- Subjects
- *
STOCHASTIC analysis , *THERMOGRAPHY , *PIXELS , *FRACTURE mechanics , *STRUCTURAL plates , *BOLOMETERS , *DIGITAL image processing , *ALUMINUM - Abstract
Abstract: The present paper describes an approach for inferring the presence and nature of tiny flaws in thin metallic panel components. The flaws are selected to be reminiscent of nascent-stage through cracks that might appear in the thin aluminum skins of aircraft, for instance. A laser heating source is used in conjunction with a low cost microbolometer-based digital IR imaging system in order that image processing might be applied to uncover promising locations to examine further, for the possible occurrence of tiny flaws. These local regions are subsequently considered during the solution of a stochastic inverse problem; aimed at inferring the existence and character of these “unseen” flaws that fit within an individual pixel associated the imaging field of view. The study is computational; employing surrogate experimental data. [Copyright &y& Elsevier]
- Published
- 2012
- Full Text
- View/download PDF
60. Long-term reduction in local inflammation by a lipid raft molecule in atopic dermatitis.
- Author
-
Dölle, S., Hoser, D., Rasche, C., Loddenkemper, C., Maurer, M., Zuberbier, T., and Worm, M.
- Subjects
- *
ATOPIC dermatitis , *SKIN inflammation , *IMMUNOLOGIC diseases , *BIOPSY , *LIPIDS - Abstract
To cite this article: Dölle S, Hoser D, Rasche C, Loddenkemper C, Maurer M, Zuberbier T, Worm M. Long-term reduction in local inflammation by a lipid raft molecule in atopic dermatitis. Allergy 2010; 65: 1158–1165. Background: The complex pathogenesis of atopic dermatitis (AD) is guided by cell surface receptor-mediated signal transduction regulated in lipid rafts. Miltefosine is a raft-modulating molecule targeting cell membranes. With this controlled clinical study, the clinical and immunomodulatory efficacy of miltefosine was investigated in patients with AD in comparison with a topical corticosteroid treatment. Methods: Sixteen patients with AD were treated topically with miltefosine and hydrocortisone localized on representative AD target lesions for 3 weeks. To assess the clinical efficacy, the three item severity (TIS) score was evaluated before, during and after treatment as well as after 4-week-follow-up period. To study the anti-inflammatory effect of miltefosine on the cellular T cell pattern, skin biopsies were analysed before and after treatment. Results: The TIS score dropped in both groups significantly after treatment. A carry-over effect was exclusively seen for miltefosine after discontinuing the treatment. These findings were substantiated by thermographic imaging with a significant decrease in the maximum temperature ( Tmax) after miltefosine application ( P = 0.034, ΔTmax = 1.7°C [2.1–3.9]). Immunohistochemically, a reduction in lesional CD4+-infiltrating T cells was observed in both treatments. Moreover, increased FoxP3+ cells were present in the skin after miltefosine treatment (before 5.4% [1.9–9.8], after 6.2% [3.5–9.5]). Conclusion: We demonstrate that miltefosine is locally active in patients with AD and led to a sustained clinical improvement in local skin inflammation. Moreover, the increased frequency of FoxP3+ cells in the skin of patients with AD suggests its immunomodulatory properties. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
61. New, non-invasive thermographic examination of body surface temperature on tetraplegic and paraplegic patients, as a supplement to existing diagnostic measures.
- Author
-
Roehl, K., Becker, S., Fuhrmeister, C., Teuscher, N., Füting, M., and Heilmann, A.
- Subjects
- *
CLINICAL trials , *THERMOGRAPHY , *PEOPLE with paraplegia , *SPINAL cord injuries , *PEOPLE with paralysis - Abstract
Study design:Prospective clinical trial of consecutive tetraplegic and paraplegic cases.Objectives:The detection of the neurological level of paralysis by thermographic imaging.Setting:Spinal Cord Injury Center in Germany Halle (Saale) and Fraunhofer Institute for Mechanics of Materials in Halle (Saale).Methods:Twelve tetraplegic and 4 paraplegic patients (ASIA A–C) were examined by thermal imaging with a diagnosis of a temperature difference on the skin surface.Results:A new application of thermography for diagnostic purposes could be demonstrated, especially by the new methodical approaches to evaluate thermographic images.Conclusion:Thermography could prospectively be applied in the emergency diagnosis and therapy for accident victims as a supplement to existing diagnostic measures for spinal cord injury.Spinal Cord (2009) 47, 492–495; doi:10.1038/sc.2008.128; published online 28 October 2008 [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
62. Stimulating Catheter as a Tool to Evaluate Peripheral Nerve Function During Hip Rotationplasty.
- Author
-
Werdehausen, Robert, Braun, Sebastian, Hermanns, Henning, Krauspe, Rüdiger, Lipfert, Peter, and Stevens, Markus F.
- Abstract
Objective: Stimulating catheters have been introduced into clinical practice to confirm perineural localization of the catheters. The muscular twitch induced over the catheter may be used to evaluate nerve function intraoperatively. Therefore, the function of the sciatic nerve was evaluated during major cancer surgery of the femur. Case Report: A 7-year-old boy (29 kg) was scheduled for hip rotationplasty for resection of an osteosarcoma of the left femur under general anesthesia and postoperative pain therapy with an epidural stimulating catheter. In hip rotationplasty the femur is resected, the lower limb and foot are rotated 180 degrees and the tibia plateau is attached to the pelvic acetabulum to form a new hip joint. During preparation of the left thigh and the sciatic nerve, motor responses to stimulation of the catheter were preserved, but the stimulation threshold increased. After vascular anastomosis the foot remained cold, therefore ropivacaine was applied epidurally and subsequently a warming of the foot was observed. At the end of the operation, the patient was free of pain, a good capillary pulse of the leg was observed, and the patient was able to move the foot and toes of the rotated leg. Conclusions: The use of epidural stimulating catheters as a tool to monitor nerve function is a novel and simple procedure to monitor nerve function intraoperatively and to enable good postoperative pain control. [Copyright &y& Elsevier]
- Published
- 2007
- Full Text
- View/download PDF
63. Uniform Distribution of Skin-Temperature Increase After Different Regional-Anesthesia Techniques of the Lower Extremity.
- Author
-
Werdehausen, Robert, Braun, Sebastian, Hermanns, Henning, Freynhagen, Rainer, Lipfert, Peter, and Stevens, Markus F.
- Abstract
Background and Objectives: Skin-temperature increase is a reliable but late indicator of success during regional-anesthesia techniques. The goal of this study is to determine the distribution of skin-temperature changes during different regional techniques. Does skin temperature increase in the whole area innervated by the blocked neural structures or only in certain regions within this area with the capability to react preferentially to sympathetic block (i.e., vessel-rich skin)? Although onset time may vary between different regional-anesthetic techniques, we hypothesized that the distribution of skin warming is equal. Methods: Skin temperature was assessed continuously by infrared thermography in 24 patients who received either combined femoral-nerve and sciatic-nerve block, epidural anesthesia, or spinal anesthesia. Results: Apart from differences in time of onset, no differential spatial distribution of skin-temperature changes could be detected. The earliest and greatest rise of skin temperature occurred at the great toe (10.6°C ± 0.4°C), became smaller proximally, and was negligible above the ankles, irrespective of the type and extent of block. Videothermography revealed that cold blood flows through subcutaneous veins immediately after onset of sympathetic block and initially decreases skin temperature (0.6°C ± 0.3°C) during onset of spinal anesthesia. Conclusion: Irrespective of the applied regional-anesthetic technique, skin-temperature changes are more pronounced distally. Thermography prevents false measurements of skin temperature above subcutaneous veins and displays flow of cold blood as the mechanism of initial skin-temperature drop after regional anesthesia. Measurements of skin-temperature increase cannot be used to evaluate the extent of analgesia or sympathetic block. [Copyright &y& Elsevier]
- Published
- 2007
- Full Text
- View/download PDF
64. Development of a high-resolution infrared thermographic imaging method as a diagnostic tool for acute undifferentiated limp in young children
- Author
-
Reza Saatchi, Derek Burke, Ruaridh Owen, and Shammi Ramlakhan
- Subjects
Male ,medicine.medical_specialty ,Limp ,0206 medical engineering ,Biomedical Engineering ,Context (language use) ,02 engineering and technology ,Critical Care and Intensive Care Medicine ,Malignancy ,Diagnostic aid ,Body Temperature ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Image Interpretation, Computer-Assisted ,Thermographic imaging ,Humans ,Medicine ,030212 general & internal medicine ,Child ,Gait ,030203 arthritis & rheumatology ,business.industry ,Significant difference ,Infant ,Small sample ,General Medicine ,medicine.disease ,020601 biomedical engineering ,Surgery ,Computer Science Applications ,Lower Extremity ,Thermography ,Sample size determination ,Child, Preschool ,Acute Disease ,Emergency Medicine ,Physical therapy ,Female ,Radiology ,medicine.symptom ,business ,Paediatric emergency ,Leg Injuries - Abstract
Objectives & Background Acute limp is a common presenting complaint in the paediatric emergency department. There are a number of possible causes of acute limp, ranging from the minor, such as traumatic injury, to more severe conditions, such as infection or malignancy. In young children, these causes are not always easily distinguished, even with the use of radiological imaging and laboratory investigations. With this pilot study, we aimed to develop an infrared thermographic imaging technique for use as a diagnostic aid in the diagnosis and monitoring of acute undifferentiated limp in young children. Therefore, the objectives of this study were to critically evaluate the effectiveness of thermal imaging in this context, whilst developing an appropriate protocol for an emergency environment. Methods Following NHS ethics approval, 30 children were recruited from the Sheffield Children9s Hospital ED. The participants were divided into groups based on diagnosis. Using an infrared camera, the lower limbs of the participants were imaged to record the skin surface temperature of both the affected side and unaffected side. Using predefined Regions of Interest (locations of thermographic measurement on the leg), any temperature difference between the two legs of each subject was recorded and the ability to isolate the specific region affected by injury was assessed. Results In all Regions of Interest assessed, the median temperature reading for the affected side was higher than that of the unaffected side. The ability of infrared thermography to isolate the specific region affected was evident on an individual basis, with particular case studies showing promise. The small sample size recruited for each group meant that tests of significant difference need to be interpreted in this context and further research is required to form clinically meaningful conclusions. Conclusion This pilot study has highlighted a number of potential avenues for future research into the use of thermographic imaging in an emergency setting. Repeating a similar study with a larger sample size will allow more credence to be given to the tests of significant difference. This study indicated that thermal imaging shows promise as an additional tool in the diagnosis and monitoring of acute undifferentiated limp in young children.
- Published
- 2017
65. Optimizing the methodology for measuring supraclavicular skin temperature using infrared thermography; implications for measuring brown adipose tissue activity in humans
- Author
-
Hertzel C. Gerstein, Sarah Kanji, Katherine M. Morrison, Elizabeth Gunn, Mark A. Tarnopolsky, Tahniyah Haq, Justin D. Crane, and Gregory R. Steinberg
- Subjects
0301 basic medicine ,Adult ,Male ,Pathology ,medicine.medical_specialty ,Adolescent ,Acclimatization ,lcsh:Medicine ,030209 endocrinology & metabolism ,Article ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Adipose Tissue, Brown ,Brown adipose tissue ,Thermographic imaging ,Medicine ,Humans ,lcsh:Science ,Multidisciplinary ,business.industry ,lcsh:R ,Skin temperature ,Mean age ,Repeatability ,Outdoor temperature ,Cold Temperature ,030104 developmental biology ,medicine.anatomical_structure ,Thermography ,lcsh:Q ,business ,Metabolic activity ,Nuclear medicine ,Skin Temperature - Abstract
The discovery of brown adipose tissue (BAT) in adults has sparked interest in its role as a therapeutic target in metabolic disorders. Infrared thermography is a promising way to quantify BAT; however, a standardized methodology has not been established. This study aims to establish a standardized and reproducible protocol to measure thermal response to cold in the supraclavicular area using thermographic imaging. In Phase 1, we compared the thermal response to 12 °C cold after acclimation at either 32 °C or room temperature using thermographic imaging. Repeatability of the 32 °C acclimation trial was studied in a second group in Phase 2. Phase 1 included 28 men (mean age 23.9 ± 5.9 y; mean BMI 25.2 ± 3.9 kg/m2) and Phase 2 included 14 men (mean age 20.9 ± 2.4 y; mean BMI 23.6 ± 3.1 kg/m2). The thermal response was greater after 32 °C than after room temperature acclimation (0.22 ± 0.19 vs 0.13 ± 0.17 °C, p = 0.05), was not related to outdoor temperature (r = −0.35, p = 0.07), did not correlate with supraclavicular fat (r = −0.26, p = 0.21) measured with dual-energy x-ray absorptiometry and was repeatable [ICC 0.69 (0.14–0.72)]. Acclimation at 32 °C followed by cold generates a reproducible change in supraclavicular skin temperature measurable by thermal imaging that may be indicative of BAT metabolic activity.
- Published
- 2017
66. Computerized infrared thermographic imaging and pulpal blood flow: Part 1. A protocol for thermal imaging of human teeth.
- Author
-
Kells, B. E., Kennedy, J. G., Biagioni, P. A., and Lamey, P. J.
- Subjects
- *
MEDICAL thermography , *TEETH , *DENTAL enamel , *DAMS (Dentistry) - Abstract
Abstract Aim To observe the thermographic appearance of teeth and to develop a suitable protocol for imaging teeth in human subjects using modern thermographic imaging (TI) equipment in a thermologically controlled environment. Methodology The emissivity of enamel was investigated using an extracted incisor tooth. A total of 12 unrestored maxillary lateral incisors in six healthy patients were then imaged under rubber dam after a 20-min equilibration period and the thermographic data analysed using a dedicated software package. Recordings were made from standardized gingival and incisal sites on each tooth and the temperature gradient established for each tooth. Subsequently, a sequence of images of both maxillary central incisors in one patient was stored every 30 s during a 20-min equilibration period with and without an air-conditioning unit in operation. Results For the lateral incisors there was a consistent temperature gradient (mean 1.28 °C) from gingival area to incisal area and there were no statistically significant differences between right and left sides for the gingival site (t = 0.34, NS) or the incisal site (t = 0.62, NS). The air-conditioning unit had a rapid and profound cooling effect. With the air-conditioning disabled there was a mean tooth surface temperature increase of 1.1 °C from 0 to 5 min of the equilibration period and 0.3 °C from 15 to 20 min. Conclusions There was no significant difference in gingival or incisal temperatures between pairs of contralateral maxillary lateral incisors and a consistent temperature gradient existed from gingival to incisal areas of healthy maxillary lateral incisor teeth. The protocol described is suitable for TI of vital teeth. However, TI measured tooth surface temperature only which was extremely sensitive to air currents. A 15-min acclimatization period under rubber dam was adequate to allow stable tooth surface temperature measurement. [ABSTRACT FROM AUTHOR]
- Published
- 2000
- Full Text
- View/download PDF
67. Computerized infrared thermographic imaging and pulpal blood flow: Part 2. Rewarming of healthy human teeth following a controlled cold stimulus.
- Author
-
Kells, B. E., Kennedy, J. G., Biagioni, P. A., and Lamey, P. J.
- Subjects
- *
MEDICAL thermography , *TEETH , *DAMS (Dentistry) - Abstract
Abstract Aim To investigate the rewarming pattern and rewarming rate of clinically healthy teeth following a controlled cold stimulus using TI techniques. Methodology A controlled cold stimulus was developed using an air stream at 20 °C. Gingival and incisal sites on 12 healthy maxillary lateral incisors in six patients were imaged under rubber dam following 20 s cooling. Images were captured at 10 s intervals during a 3-min rewarming period and the data used to construct graphs of the rewarming rate. Log transformation of the data was used to produce ‘best fit’ straight line graphs. Linear regression analysis was used to examine three variables, viz. the side of the mouth (right or left), the site of measurement (gingival or incisal) and the phase of rewarming (early 0–90 s, late 91–180 s). Results The mean temperature change (Δt °C) during rewarming was 8.5 °C (SD 1.0 °C) for gingival sites and 7.2 °C (SD 1.1 °C) for incisal sites. The slope of the ‘best fit’ straight line data enabled a rewarming index to be calculated for each site on each tooth. Linear regression analysis showed that the phase of rewarming was highly significant but the other variables were not. A one-way anova showed no significant differences between or within groups. Conclusions Three min is an appropriate time to record rewarming of teeth cooled for 20 s with an airstream at 20 °C. The side or site used to record surface temperatures using this technique is not significant. Rewarming is exponential and log transformation of the data produces a well-fitting straight line graph. The slope of this line provides a rewarming index which should enable comparison of TI and laser Doppler flowmetry in determining pulpal blood flow as a measure of tooth vitality. [ABSTRACT FROM AUTHOR]
- Published
- 2000
- Full Text
- View/download PDF
68. Non-Invasive Forehead Segmentation in Thermographic Imaging
- Author
-
M. Ruiz de Adana, Joaquín Olivares, Fernando Leon-Garcia, Francisco Javier Rodriguez-Lozano, and JM Jose Palomares
- Subjects
Computer science ,Image processing ,02 engineering and technology ,lcsh:Chemical technology ,Biochemistry ,Article ,computer vision ,Analytical Chemistry ,body parameters ,Image Processing, Computer-Assisted ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,Computer vision ,Segmentation ,lcsh:TP1-1185 ,Electrical and Electronic Engineering ,Instrumentation ,Forehead segmentation ,forehead segmentation ,Body parameters ,business.industry ,020207 software engineering ,Frame rate ,thermographic imaging ,Atomic and Molecular Physics, and Optics ,Thermographic imaging ,image processing ,medicine.anatomical_structure ,Thermography ,Face (geometry) ,Metric (mathematics) ,Forehead ,Breathing ,020201 artificial intelligence & image processing ,Artificial intelligence ,business ,Algorithms - Abstract
The temperature of the forehead is known to be highly correlated with the internal body temperature. This area is widely used in thermal comfort systems, lie-detection systems, etc. However, there is a lack of tools to achieve the segmentation of the forehead using thermographic images and non-intrusive methods. In fact, this is usually segmented manually. This work proposes a simple and novel method to segment the forehead region and to extract the average temperature from this area solving this lack of non-user interaction tools. Our method is invariant to the position of the face, and other different morphologies even with the presence of external objects. The results provide an accuracy of 90% compared to the manual segmentation using the coefficient of Jaccard as a metric of similitude. Moreover, due to the simplicity of the proposed method, it can work with real-time constraints at 83 frames per second in embedded systems with low computational resources. Finally, a new dataset of thermal face images is presented, which includes some features which are difficult to find in other sets, such as glasses, beards, moustaches, breathing masks, and different neck rotations and flexions.
- Published
- 2019
69. Geometria substituta de mama baseada na retirada manual de curvas de termogramas para estimativa de parâmetros termofísicos mamários
- Author
-
José Reginaldo Alves de Queiroz Júnior and Rita de Cássia Fernandes de Lima
- Subjects
Computer science ,business.industry ,Thermography ,Thermographic imaging ,Pattern recognition ,Artificial intelligence ,business - Abstract
A termografia vem sendo proposta como uma ferramenta auxiliar no rastreio do câncer de mama. Essas imagens também são utilizadas na validação de simulações numéricas tridimensionais. A produção de um modelo mais realístico e personalizado possibilitaria uma estimativa mais precisa das propriedades termofísicas da mama. Este trabalho teve como objetivo o desenvolvimento de uma metodologia para a produção de uma geometria tridimensional personalizada da mama a partir das curvas extraídas dos termogramas contidos no Banco de Dados de Imagens Termográficas da UFPE.
- Published
- 2019
70. Determining Changes in Thermal Patterns in Canines based on Coat Type using Infrared Thermographic Imaging
- Author
-
Claire J. Kwon and Cord M. Brundage
- Subjects
Coat ,Materials science ,Infrared ,Thermal ,Thermographic imaging ,Genetics ,Molecular Biology ,Biochemistry ,Biotechnology ,Biomedical engineering - Published
- 2019
71. Manipulating neck temperature alters contagious yawning in humans
- Author
-
Valentina Ramirez, Colleen P. Ryan, Andrew C. Gallup, and Omar Tonsi Eldakar
- Subjects
Adult ,Male ,medicine.medical_specialty ,Adolescent ,Carotid arteries ,Experimental and Cognitive Psychology ,Stimulus (physiology) ,Audiology ,Brain cooling ,Yawn ,Body Temperature ,03 medical and health sciences ,Behavioral Neuroscience ,Young Adult ,0302 clinical medicine ,Thermographic imaging ,Adaptation, Psychological ,medicine ,Humans ,0501 psychology and cognitive sciences ,050102 behavioral science & comparative psychology ,Social Behavior ,business.industry ,05 social sciences ,Brain ,Thermoregulation ,Imitative Behavior ,Carotid Arteries ,Thermography ,Female ,Yawning ,medicine.symptom ,business ,030217 neurology & neurosurgery ,Neck - Abstract
The existence of yawning across a diverse array of species has led many researchers to postulate its neurological significance. One hypothesis, which has garnered recent support, posits that yawns function to cool the brain by flushing hyperthermic blood away from the skull while simultaneously introducing a cooler arterial supply. The current study tested this hypothesis by examining how manipulations aimed at modifying carotid artery temperature, which in turn directly alters cranial temperature, influences contagious yawning in humans. Participants held either a warm (46 °C), cold (4 °C) or room temperature (22 °C) pack firmly to their neck, just over their carotid arteries, for a period of five minutes prior to watching a contagious yawning stimulus. Thermographic imaging verified that these manipulations produced predicted changes in temperature at the superomedial orbital area, a region previously used as a noninvasive measure of brain temperature (i.e., the brain temperature tunnel). As predicted by past research, both the urge to yawn and overall yawn frequency significantly diminished in the cooling condition (p
- Published
- 2019
72. Application of NDT thermographic imaging of aerospace structures
- Author
-
Maxwell J. Davis, Xavier Maldague, Antonios Tsourdos, Clemente Ibarra-Castanedo, Hai Zhang, Hamed Yazdani Nezhad, Tim Mackley, Alex Williamson, Nicolas P. Avdelidis, and Shakeb Deane
- Subjects
TL ,Computer science ,UAV ,Composite ,02 engineering and technology ,01 natural sciences ,Automotive engineering ,active infrared thermography ,010309 optics ,kissing bond ,Operator (computer programming) ,Nondestructive testing ,0103 physical sciences ,Thermographic imaging ,Aerospace ,business.industry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Inspection time ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Thermography ,vibrothermography ,TJ ,pulsed thermography ,0210 nano-technology ,business - Abstract
This work aims to address the effectiveness and challenges of Non-Destructive Testing (NDT) inspection and improve the detection of defects without causing damage to the material or operator. It focuses on two types of NDT methods; pulsed thermography and vibrothermography. The paper also explores the possibility of performing automated aerial inspection using an unmanned aerial vehicle (UAV) provided with a thermographic imaging system. The concept of active thermography is discussed for inspecting aircraft CFRP panels along with the proposal for performing aerial inspection using the UAV for real time inspection. Static NDT results and the further UAV research indicate that the UAV inspection approach could significantly reduce the inspection time, cost, and workload, whilst potentially increasing the probability of detection.
- Published
- 2019
73. Autonomous systems thermographic NDT of composite structures
- Author
-
Hai Zhang, Alex Williamson, Nicolas P. Avdelidis, Xavier Maldague, Antonios Tsourdos, Vasileios Tzitzilonis, H. Yazdani Nezhad, Clemente Ibarra-Castanedo, and Shakeb Deane
- Subjects
Computer science ,business.industry ,TL ,Composite number ,Inspection time ,composites ,Automotive engineering ,Imaging ,Composite structure ,Thermography ,Nondestructive testing ,Thermographic imaging ,UAS ,TJ ,CFRP ,Aerospace ,business - Abstract
Transient thermography is a method used successfully in the evaluation of composite materials and aerospace structures. It has the capacity to deliver both qualitative and quantitative results about hidden defects or features in a composite structure. Aircraft must undergo routine maintenance – inspection to check for any critical damage and thus to ensure its safety. This work aims to address the challenge of NDT automated inspection and improve the defects’ detection by suggesting an autonomous thermographic imaging approach using a UAV (Unmanned Aerial Vehicle) active thermographic system. The concept of active thermography is discussed and presented in the inspection of aircraft CFRP panels along with the mission planning for aerial inspection using the UAV for real time inspection. Results indicate that the suggested approach could significantly reduce the inspection time, cost, and workload, whilst potentially increase the probability of detection of defects on aircraft composites.
- Published
- 2019
74. The Use of Thermal Imaging Techniques as a Method of Monitoring the New Born
- Author
-
Catalina Luca, D. Andriţoi, Calin Corciova, and Radu Ciorap
- Subjects
Signature detection ,Wavelet ,Respiratory rate ,business.industry ,Newborn Respiratory Rate ,Thermographic imaging ,Biomedical signal ,Medicine ,Monitoring methods ,Monitoring tool ,business ,Biomedical engineering - Abstract
In this paper we present a report on the use of thermographic imaging techniques as a monitoring tool in newborn respiratory rate. The basis of this type of monitoring is the processing of real-time thermographic images. This contactless monitoring method it is absolute necessary because it is designed to monitor a very fragile category of patients: premature new born babies. Our biomedical signal of interests it is represented by the spontaneous breaths of the newborn. In the present study we demonstrate that the respiratory rate of the preterm newborn can be monitored based on the analysis of temperature changes that occurs in the anterior nasal area (nostrils).
- Published
- 2019
75. Thermographic imaging of mouse across circadian time reveals body surface temperature elevation associated with non-locomotor body movements
- Author
-
Yota Maekawa, Yoshiaki Yamaguchi, Yuichi Inoue, Takahito Miyake, Hiroyuki Shimatani, and Masao Doi
- Subjects
Physiology ,Circadian clock ,Video Recording ,Social Sciences ,Body Temperature ,Machine Learning ,Mice ,Thermographic imaging ,Medicine and Health Sciences ,Psychology ,Mammals ,Chronobiology ,Multidisciplinary ,Animal Behavior ,musculoskeletal, neural, and ocular physiology ,Eukaryota ,Surface Temperature ,Thermoregulation ,Circadian Rhythm ,Circadian Rhythms ,Physiological Parameters ,Thermography ,Vertebrates ,Physical Sciences ,Medicine ,Anatomy ,Locomotion ,Research Article ,Body Temperature Regulation ,Body surface temperature ,Surface Properties ,Science ,Materials Science ,Material Properties ,Nose ,Biology ,Rodents ,Video imaging ,Rhythm ,Animals ,Circadian rhythm ,Behavior ,Biological Locomotion ,Organisms ,Biology and Life Sciences ,Mice, Inbred C57BL ,Face ,Amniotes ,Zoology ,Head ,Neuroscience - Abstract
Circadian clocks orchestrate multiple different physiological rhythms in a well-synchronized manner. However, how these separate rhythms are interconnected is not exactly understood. Here, we developed a method that allows for the real-time simultaneous measurement of locomotor activity and body temperature of mice using infrared video camera imaging. As expected from the literature, temporal profiles of body temperature and locomotor activity were positively correlated with each other. Basically, body temperatures were high when animals were in locomotion. However, interestingly, increases in body temperature were not always associated with the appearance of locomotor activity. Video imaging revealed that mice exhibit non-locomotor activities such as grooming and postural adjustments, which alone induce considerable elevation of body temperature. Noticeably, non-locomotor movements always preceded the initiation of locomotor activity. Nevertheless, non-locomotor movements were not always accompanied by locomotor movements, suggesting that non-locomotor movements provide a mechanism of thermoregulation independent of locomotor activity. In addition, in the current study, we also report the development of a machine learning-based recording method for the detection of circadian feeding and drinking behaviors of mice. Our data illustrate the potential utility of thermal video imaging in the investigation of different physiological rhythms.
- Published
- 2021
76. Thermographic imaging in a dog with macroglossia from an encircling, strangulating lingual linear foreign body.
- Author
-
Angulo, Hernan Lizardo, Bach, Jonathan, Snyder, Christopher, and Walker, Julie
- Published
- 2021
- Full Text
- View/download PDF
77. Publisher’s Note: 'Deep learning approaches for thermographic imaging' [J. Appl. Phys 128, 155103 (2020)]
- Author
-
Gregor Thummerer, Peter Burgholzer, G. Mayr, Mario Huemer, Bernhard Lehner, and Péter Kovács
- Subjects
Optics ,business.industry ,Computer science ,Deep learning ,Thermographic imaging ,General Physics and Astronomy ,Artificial intelligence ,business - Published
- 2020
78. Nondestructive Evaluation of Civil Structures Using Thermographic Imaging Technologies
- Author
-
Lee Sang-Youl
- Subjects
Engineering ,business.industry ,Nondestructive testing ,Thermographic imaging ,Forensic engineering ,business ,Construction engineering - Published
- 2016
79. Thermographic imaging as alternative method in allergy diagnosis
- Author
-
Tomasz Rok, Grzegorz Tatoń, Eugeniusz Rokita, Tomasz J. Guzik, and Tomasz Śliwa
- Subjects
Alternative methods ,Allergy ,Both forearms ,business.industry ,Specific immunoglobulin E ,Skin reactivity ,Condensed Matter Physics ,medicine.disease ,01 natural sciences ,010406 physical chemistry ,0104 chemical sciences ,03 medical and health sciences ,Skin reaction ,0302 clinical medicine ,030228 respiratory system ,Thermography ,Thermographic imaging ,Forensic engineering ,Medicine ,Physical and Theoretical Chemistry ,Nuclear medicine ,business - Abstract
Allergen sensitization is being diagnosed by commonly available methods in clinical practice—skin prick tests (SPTs) and specific immunoglobulin E test (sIgE). Recently, a new thermographic (TH) method for the assessment of SPT was developed, and it was demonstrated that the TH measurements of forearm temperature distribution during SPT, supported by a mathematical model, offer a new quantification method of allergen-induced skin reactions. The aim of this study is a comprehensive comparison of the TH method with SPT and sIgE techniques. The studies were performed for a group of 51 patients. The SPT and sIgE examinations were done in a routine way. For TH analyses, set of thermograms of both forearms were acquired after prick and analyzed with the use of developed software. All results were converted into categorized scale for comparison. The collected results indicate high correlation coefficients between methods equal to 0.76–0.99. Sensitivity and accuracy of TH assessment in respect of both SPT and sIgE methods is at good level (0.72–0.93). Acceptable level of specificity 0.60–0.88 was also achieved for most allergic responses. Excellent agreement between SPT and sIgE methods was observed which makes the TH assessment competitive. Due to higher precision and sensitivity of digital infrared technology, possibility of making error in diagnosis is significantly reduced. Additional advantage of the TH method relies on an estimation of the skin reactivity which allows highlighting the hypersensitivity patients and automatic correction of the diagnosis.
- Published
- 2016
80. Thermal optimum: time, intimacy and the elemental in the first thousand days of life
- Author
-
Fiona C. Ross and Nicholas Eppel
- Subjects
Cultural Studies ,Trace (semiology) ,Anthropology ,Interpretation (philosophy) ,0502 economics and business ,05 social sciences ,Thermographic imaging ,Subject (philosophy) ,Sociology ,050207 economics ,050205 econometrics ,Visual arts - Abstract
“Thermal Optimum” is a collaboration between photographer Nicholas Eppel and anthropologist Fiona C. Ross. Focusing on pregnancy and early childhood, we sought a way to open questions about how the “hard facts” of biology are given force and presence through “soft” actions of care. Thermographic imaging, initially developed for military use, allows one to trace a subject’s “heat signature,” making visible aspects of the world that are ordinarily undetectable to the human eye. The resultant images disrupt visual expectations and accustomed modes of interpretation. An experiment in seeing, we are interested in thinking about what these kinds of images enable and unseat for us, an artist and an anthropologist.
- Published
- 2016
81. The effect of middle and lower trapezius strength exercises and levator scapulae and upper trapezius stretching exercises in upper crossed syndrome
- Author
-
Jae-Wook Shin, Wonsik Bae, Keoncheol Lee, and Hyun-Ok Lee
- Subjects
Upper trapezius ,030506 rehabilitation ,medicine.medical_specialty ,Strength exercise ,business.industry ,Significant difference ,Upper crossed syndrome ,Physical Therapy, Sports Therapy and Rehabilitation ,030229 sport sciences ,musculoskeletal system ,Stretching exercise ,body regions ,03 medical and health sciences ,0302 clinical medicine ,Exercise program ,Forward head posture ,Thermographic imaging ,Physical therapy ,Medicine ,Original Article ,0305 other medical science ,business ,Crossed syndrome ,Stretching exercises - Abstract
[Purpose] The purpose of this study was to determine the effectiveness of strength and stretching exercises on upper crossed syndrome. [Subjects and Methods] After measuring cervical alignment using the Global Posture System, 30 students with forward head posture were selected and divided into two groups. The experimental group (n=15) participated in strength and stretching exercises, three times per week for 4 weeks. The control group (n=15) did not participate in the exercises. The exercise program comprised middle and lower trapezius strength exercises and levator scapulae and upper trapezius stretching exercises. The temperature of the posterior neck was then measured using digital infrared thermographic imaging. [Results] There was a significant difference between the pretest and posttest results in the experimental group, and a significant difference in posterior neck temperature between the two groups. [Conclusion] This study showed that middle and lower trapezius strength exercises and levator scapulae and upper trapezius stretching exercises are more effective for upper crossed syndrome.
- Published
- 2016
82. Retraction: Thermographic imaging for use in artificial intelligence and vision algorithms (IOP Conf. Series: Materials Science and Engineering 872 012035)
- Author
-
Ana María Echeverría, Jesús Silva, Noel Varela, and Omar Bonerge Pineda Lezama
- Subjects
Engineering drawing ,Series (mathematics) ,Thermographic imaging ,Vision algorithms - Abstract
Published 15 September 2020 This article, and others within this volume, has been retracted by IOP Publishing following clear evidence of plagiarism and citation manipulation. This work was originally published in Spanish (1) and has been translated and published without permission or acknowledgement to the original authors. IOP Publishing Limited has discovered other papers within this volume that have been subjected to the same treatment. This is scientific misconduct. Misconduct investigations are ongoing at the author’s institutions. IOP Publishing Limited will update this notice if required once those investigations have concluded. IOP Publishing Limited request any citations to this article be redirected to the original work (1). Anyone with any information regarding these papers is requested to contact conferenceseries@ioppublishing.org.
- Published
- 2020
83. Thermal behavior analysis of different solar PV modules via thermographic imaging
- Author
-
István Farkas, Divine Atsu, and István Seres
- Subjects
Materials science ,Renewable Energy, Sustainability and the Environment ,020209 energy ,020208 electrical & electronic engineering ,Thermal ,Photovoltaic system ,Thermographic imaging ,Thermography ,0202 electrical engineering, electronic engineering, information engineering ,02 engineering and technology ,Temperature difference ,Single point ,Automotive engineering - Abstract
The temperature of a photovoltaic (PV) system is a critical factor in the photovoltaic conversion process; hence, the practical performance of a PV system significantly depends on its temperature. Several different methods exist for the determination of PV module temperature. In this study, thermography was employed to investigate the thermal behavior of different solar PV modules under outdoor operating conditions. It was observed that the temperature difference across the area of a PV module could reach as high as 12.5–14.8 °C depending on the type of PV module. Hence, the trends for the lowest and highest temperature were not predictable. Glass-to-glass non-frame PV modules exhibited the highest temperature gradients compared to glass-to-Tedlar non-frame modules. The observed temperature gradients demonstrated that measuring the temperature at a single point on the module was not sufficient to accurately represent the temperature over the entirety of the PV module.
- Published
- 2020
84. Somatic sympathetic vasomotor changes documented by medical thermographic imaging during acupuncture analgesia.
- Author
-
Thomas, D., Collins, S., and Strauss, S.
- Abstract
Acupuncture is widely used for pain relief in many musculoskeletal disorders, and evidence suggests that modulation of the sympathetic nervous system responses which play an integral part in somatic pain, is an important mechanism of acupuncture action. This prospective study of 20 patients with neck and arm pain measured finger temperature, controlled by somatic sympathetic vasomotor activity before and after needle acupuncture. Responses were correlated with visual analogue scale (VAS) of pain severity. An association was found between pain relief and reduced sympathetic vasomotor activity. In 10 patients with significant reduction in visual analogue scale (VAS) pain (p<.05), the mean change in temperature (Δt°C) was 0.55 (SD±0.86) with significant difference in pre to post treatment temperatures (p<.01). In 10 patients without significant pain relief on VAS scoring (p>.05), the mean t°C was 0.20 (SD+0.72) without significant difference in pre to post treatment temperatures (p>.05). The relevance of somatic sympathetic influences on musculoskeletal pain and modulation of sympathetic activity by acupuncture will be discussed. [ABSTRACT FROM AUTHOR]
- Published
- 1992
- Full Text
- View/download PDF
85. Modelling of thermal patterns of electrosurgical dispersive electrodes.
- Author
-
Aubry-Frize, M. and Poussart, Y.
- Published
- 1986
- Full Text
- View/download PDF
86. Photothermographic and Thermographic Imaging Materials
- Author
-
D. R. Whitcomb and P. J. Cowdery-Corvan
- Subjects
Materials science ,Thermographic imaging ,Biomedical engineering - Published
- 2018
87. Thermographic imaging as a computer method in training efficiency measurement in preparation for tourist activity
- Author
-
Robert Latosiewicz, Piotr Borkowski, and Jolanta G. Zuzda
- Subjects
business.industry ,Computer science ,Thermographic imaging ,Training (meteorology) ,Computer vision ,Artificial intelligence ,Programming method ,business - Published
- 2018
88. Exogenous hydrogen sulfide gas does not induce hypothermia in normoxic mice
- Author
-
Michal Heger, Thomas M. van Gulik, Marcel Cornelis Dirkes, Rick Bezemer, Sebastiaan D. Hemelrijk, Marit H. N. van Velzen, Anesthesiology, Graduate School, Other departments, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, and Surgery
- Subjects
0301 basic medicine ,medicine.medical_specialty ,Suspended animation ,genetic structures ,Hydrogen sulfide metabolism ,Hydrogen sulfide ,chemistry.chemical_element ,lcsh:Medicine ,Hypothermia ,Oxygen ,Article ,Body Temperature ,03 medical and health sciences ,chemistry.chemical_compound ,Mice ,0302 clinical medicine ,Oxygen Consumption ,stomatognathic system ,Hypothermia, Induced ,Internal medicine ,Thermographic imaging ,medicine ,Animals ,Hydrogen Sulfide ,Hypoxia ,lcsh:Science ,Multidisciplinary ,Chemistry ,Oxygen metabolism ,lcsh:R ,technology, industry, and agriculture ,Hypoxia (environmental) ,equipment and supplies ,humanities ,Mice, Inbred C57BL ,030104 developmental biology ,Endocrinology ,Female ,lcsh:Q ,medicine.symptom ,030217 neurology & neurosurgery ,psychological phenomena and processes - Abstract
Hydrogen sulfide (H2S, 80 ppm) gas in an atmosphere of 17.5% oxygen reportedly induces suspended animation in mice; a state analogous to hibernation that entails hypothermia and hypometabolism. However, exogenous H2S in combination with 17.5% oxygen is able to induce hypoxia, which in itself is a trigger of hypometabolism/hypothermia. Using non-invasive thermographic imaging, we demonstrated that mice exposed to hypoxia (5% oxygen) reduce their body temperature to ambient temperature. In contrast, animals exposed to 80 ppm H2S under normoxic conditions did not exhibit a reduction in body temperature compared to normoxic controls. In conclusion, mice induce hypothermia in response to hypoxia but not H2S gas, which contradicts the reported findings and putative contentions.
- Published
- 2018
89. Thermographic evaluation of primary closure and second intention healing in dairy calves
- Author
-
Claudia A Ferreira, Munashe Chigerwe, Sarah S. le Jeune, and Maire C. Rayburn
- Subjects
Dorsum ,Male ,medicine.medical_specialty ,Surgical Wound ,law.invention ,Random Allocation ,Randomized controlled trial ,law ,Thermographic imaging ,Biopsy ,medicine ,Animals ,Clinical significance ,Skin ,Wound Healing ,integumentary system ,General Veterinary ,medicine.diagnostic_test ,business.industry ,Skin temperature ,Surgery ,Lower Extremity ,Thermography ,Cattle ,Wound healing ,business - Abstract
OBJECTIVE: To evaluate the suitability of infrared thermography in assessing healing of surgically created wounds that are managed by primary closure or second intention in neonatal dairy calves during a 3‐week period. STUDY DESIGN: Randomized clinical trial. ANIMALS: Six Jersey bull calves. METHODS: Two skin patches approximately 10 cm² were shaved on each hind limb of all calves. The dorsal patch was designated the wound creation site, and the ventral patch was the control. The wound creation sites were randomly assigned for either primary closure or healing by second intention. Wounds were created by using an 8‐mm biopsy punch. Thermographic imaging was performed prior to wound creation and at 0 minutes; 15 minutes; 2, 4, 8, 12, and 24 hours; and 2, 3, 4, 7, 10, 14, and 21 days postwounding. RESULTS: There were no differences in skin temperature changes observed between wounds that were managed by primary closure or second intention (P = .9934) at any time. Time after wound creation had an effect on the skin temperature (P
- Published
- 2017
90. Intraoperative thermographic imaging to assess myocardial distribution of Del Nido cardioplegia
- Author
-
Alice S. Ferng, Taufiek Konrad Rajab, Jack B. Keenan, Samuel Suk Kim, Zain Khalpey, and Prashant Rao
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Infrared Rays ,Clinical Decision-Making ,030204 cardiovascular system & hematology ,03 medical and health sciences ,0302 clinical medicine ,Clinical decision making ,Computer Systems ,Monitoring, Intraoperative ,Thermographic imaging ,Medicine ,Humans ,In patient ,Coronary Artery Bypass ,Cardioplegic Solutions ,Aged ,Ir camera ,business.industry ,Cardioplegic solutions ,Cardiac surgery ,030228 respiratory system ,Thermography ,Heart Arrest, Induced ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Nuclear medicine - Abstract
We describe the intraoperative non-invasive use of an infrared (IR) camera to monitor Del Nido cardioplegia delivery in patients undergoing cardiac surgery. Thermal pictures were taken pre- and post-cardioplegia and at timed points after arrest, and compared to readings from a transseptal temperature probe. There was good concordance between the transseptal probe and the IR camera temperature readings. This non-invasive technique, which assesses cardioplegic distribution, may help to determine when additional doses of Del Nido cardioplegia are required during periods of cardioplegic arrest.
- Published
- 2017
91. Effects of different sitting positions on skin temperature of the lower extremity
- Author
-
Jemyung Shim, Seung Namkoong, Sung-Joong Kim, and Jung-Myo Shim
- Subjects
Orthodontics ,medicine.medical_specialty ,Blood flow volume ,business.industry ,Skin temperature ,Physical Therapy, Sports Therapy and Rehabilitation ,Sitting position ,Blood flow ,Sitting Positions ,Sitting ,Surgery ,medicine.anatomical_structure ,Thermographic imaging ,Medicine ,Original Article ,Ankle ,business - Abstract
[Purpose] The purpose of this study was to identify the effect of different sitting positions on the skin temperature of the lower extremity. [Subjects] The subjects of this study were 23 healthy university students (8 males, 15 females). [Methods] Normal sitting (NS), upper leg cross (ULC) and ankle on knee (AOK) positions were conducted to measure the changes in skin temperature using digital infrared thermographic imaging (DITI). [Results] ULC upper ankle, NS upper shin, ULC upper shin and NS lower shin showed significant declines in temperature with time. [Conclusion] These finding suggest that the ULC and NS sitting positions cause decline of blood flow volume to the lower extremity resulting in decrease of temperature of the lower extremity. Especially, sitting with the legs crossed interferes with the circulation of blood flowing volume much more than just sitting in a chair.
- Published
- 2015
92. Infrared thermography – evaluation of the results reproducibility
- Author
-
Niubis Mustelier, Eva Barreira, Elton Bauer, Sara Freitas, Vasco Peixoto de Freitas, and Faculdade de Engenharia
- Subjects
Engineering ,Reproducibility ,Infrared ,business.industry ,Delamination ,Engenharia civil, Engenharia civil ,Building and Construction ,Structural engineering ,Rendering (computer graphics) ,Temperature gradient ,Thermographic imaging ,Thermography ,Quantitative assessment ,Engenharia civil [Ciências da engenharia e tecnologias] ,Civil engineering, Civil engineering ,Civil engineering [Engineering and technology] ,business ,Civil and Structural Engineering ,Biomedical engineering - Abstract
Purpose – Infrared thermography is increasingly being used to diagnose pathologies in buildings, such as façade defects. The purpose of this paper is to assess the results reproducibility and the equipment influence on the measurements. To do so, it was defined as case study the assessment of rendering delamination. Design/methodology/approach – Two infrared cameras of different makers were used to detect the presence of defects deliberately created in specimens. The tests were done in the laboratory with a heat source. The defects were detected through a temperature gradient between the zones with and without defect. Findings – With this thermographic imaging, it was possible to identify the defects in the specimen both qualitatively and quantitatively. The results were found to be reproducible in the three cycles performed. The influence of the equipment on the results was of little significance for the quantitative assessment criterion “temperature difference between zones with and without defect”, but for the criterion “absolute surface temperature”, the difference in the results yielded by the two cameras was around 1.8°C. Originality/value – The results suggest that there is reproducibility of the measurements, considering both the qualitative and quantitative approach, when assessing delamination, irrespective of the maker of the equipment used. The influence of the equipment on the results depends on the quantitative assessment criterion used.
- Published
- 2015
93. Infrared Thermographic Imaging in Geoengineering and Geoscience
- Author
-
Ömer Aydan
- Subjects
0209 industrial biotechnology ,020901 industrial engineering & automation ,0205 materials engineering ,business.industry ,Infrared ,Thermographic imaging ,Geoengineering ,02 engineering and technology ,business ,Geology ,Remote sensing ,020501 mining & metallurgy - Published
- 2017
94. Thermographic imaging in sports and exercise medicine:a Delphi study and consensus statement on the measurement of human skin temperature
- Author
-
Danilo Gomes Moreira, Robert G. Schwartz, Jose Ignacio Priego Quesada, David D. Pascoe, Joseph T. Costello, Arcangelo Merla, Adérito Seixas, Damien Fournet, Manuel Sillero-Quintana, George Havenith, Damiano Formenti, Ciro José Brito, Boris G. Vainer, Kurt Ammer, Kevin Howell, Carlos Magno Amaral Costa, Eleazar Samuel Kolosovas-Machuca, Alex de Andrade Fernandes, José Jamacy de Almeida Ferreira, Clare Eglin, Aaron J. E. Bach, James Selfe, Glen P. Kenny, Anna Jung, Jakub Grzegorz Adamczyk, Matthew J. Maley, and Ismael Fernández-Cuevas
- Subjects
medicine.medical_specialty ,Delphi Technique ,Physiology ,Sports science ,Delphi method ,Guideline ,Sports Medicine ,Biochemistry ,Thermoregulation ,03 medical and health sciences ,0302 clinical medicine ,Thermographic imaging ,medicine ,Protocol ,Animals ,Humans ,Medical physics ,Exercise ,computer.programming_language ,Statement (computer science) ,business.industry ,Skin temperature ,030229 sport sciences ,Checklist ,Exercise Therapy ,Infrared thermography ,Thermography ,Skin Temperature ,General Agricultural and Biological Sciences ,business ,computer ,030217 neurology & neurosurgery ,Delphi ,Consensus guideline ,Body Temperature Regulation ,Developmental Biology ,Sports and Exercise Sciences - Abstract
© 2017 Elsevier Ltd The importance of using infrared thermography (IRT) to assess skin temperature (t sk ) is increasing in clinical settings. Recently, its use has been increasing in sports and exercise medicine; however, no consensus guideline exists to address the methods for collecting data in such situations. The aim of this study was to develop a checklist for the collection of t sk using IRT in sports and exercise medicine. We carried out a Delphi study to set a checklist based on consensus agreement from leading experts in the field. Panelists (n = 24) representing the areas of sport science (n = 8; 33%), physiology (n = 7; 29%), physiotherapy (n = 3; 13%) and medicine (n = 6; 25%), from 13 different countries completed the Delphi process. An initial list of 16 points was proposed which was rated and commented on by panelists in three rounds of anonymous surveys following a standard Delphi procedure. The panel reached consensus on 15 items which encompassed the participants’ demographic information, camera/room or environment setup and recording/analysis of t sk using IRT. The results of the Delphi produced the checklist entitled “Thermographic Imaging in Sports and Exercise Medicine (TISEM)” which is a proposal to standardize the collection and analysis of t sk data using IRT. It is intended that the TISEM can also be applied to evaluate bias in thermographic studies and to guide practitioners in the use of this technique.
- Published
- 2017
95. An intraoperative imaging system for neurosurgical thermography
- Author
-
Jens Müller, Ronald Tetzlaff, Elisa Bohl, Jan Müller, Benjamin Koch, Christian Schnabel, and Edmund Koch
- Subjects
Engineering ,Random access memory ,business.industry ,020208 electrical & electronic engineering ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,02 engineering and technology ,01 natural sciences ,010309 optics ,Temporal filter ,0103 physical sciences ,Thermographic imaging ,Thermography ,0202 electrical engineering, electronic engineering, information engineering ,Computer vision ,Artificial intelligence ,business ,Intraoperative imaging ,Biomedical engineering - Abstract
Intraoperative thermographic imaging, associated with time-resolved data analysis, is used to identify and visualise functional areas and pathological tissue in brain surgery. In this contribution we propose a hardware-software system for real-time pre-processing, fusion, and analysis of concurrent infrared and whitelight recordings. As a proof-of-concept, a digital temporal filter is applied to the removal of motion artefacts. To provide the required processing power in an intraoperative environment, the system is implemented on an FPGA device.
- Published
- 2017
96. Thermographic imaging of facial and ventilatory activity during vocalization, speech and expiration (Conference Presentation)
- Author
-
Ireneusz Usydus, Paweł Jarosz, and Krzysztof Izdebski
- Subjects
Jet (fluid) ,Computer science ,law ,Acoustics ,Thermography ,Thermographic imaging ,Ventilation (architecture) ,Breathing ,Expiration ,Blood flow ,law.invention - Abstract
Ventilation, speech and singing must use facial musculature to complete these motor tasks and these tasks are fueled by the air we inhale. This motor process requires increase in the blood flow as the muscles contract and relax, therefore skin surface temperature changes are expected. Hence, we used thermography to image these effects. The system used was the thermography camera model FLIR X6580sc with a chilled detector (FLIR Systems Advanced Thermal Solutions, 27700 SW Parkway Ave Wilsonville, OR 97070, USA). To assure improved imaging, the room temperature was air-conditioned to +18° C. All images were recoded at the speed of 30 f/s. Acquired data were analyzed with FLIR Research IR Max Version 4 software and software filters. In this preliminary study a male subject was imaged from frontal and lateral views simultaneously while he performed normal resting ventilation, speech and song. The lateral image was captured in a stainless steel mirror. Results showed different levels of heat flow in the facial musculature as a function of these three tasks. Also, we were able to capture the exalted air jet directionality. The breathing jet was discharged in horizontal direction, speaking voice jet was discharged downwards while singing jet went upward. We interpreted these jet directions as representing different gas content of air expired during these different tasks, with speech having less oxygen than singing. Further studies examining gas exchange during various forms of speech and song and emotional states are warranted.
- Published
- 2017
97. Machine vision and thermographic imaging for determining of grading of tomato on postharvest
- Author
-
Daesik Son, Seong In Cho, Myongkyoon Yang, and Jinshi Cui
- Subjects
Engineering drawing ,Machine vision ,business.industry ,Computer science ,Thermographic imaging ,Postharvest ,Computer vision ,Artificial intelligence ,business ,Grading (education) - Published
- 2017
98. Contactfree Infrared Thermography for the Determining 'Normal Skin Temperature' in 50 Healthy Probands
- Author
-
Kamayni Agarwal, Ann-Christin Lange, and H. Beck
- Subjects
Proband ,medicine.medical_specialty ,business.industry ,Skin temperature ,Acclimatization ,Surgery ,Normal skin temperature ,Thermography ,Healthy volunteers ,Thermographic imaging ,Medicine ,business ,Nuclear medicine ,Perfusion - Abstract
Definition of “normal temperature” is controversial in many text books on dermatology and physiology and depends on many factors. Thermographic imaging of the hands was performed in 50 healthy volunteers on four different days with an interval of 48-72 hours summing up to a total of 200 measurements. Infrared thermograms were gathered at defined points in each person after an acclimatization period of 30 minutes under standardized conditions according to the recommendations of the American Academy of Thermology. Despite of an acclimatization period of 30 minutes a decrease of temperature in the monitored area independent of gender could be observed. Initial surface temperature after the acclimatization period in these healthy probands ranged from 25.2 to 33.8°C (31.6 ± 2.1°C, median 32.2°C). Severe intra- and interindividual temperature differences could be detected despite standardized room conditions. Skin temperature varies greatly between and within individuals. Contactfree infrared thermography may improve detection of areas with altered perfusion if a symmetrical scan is performed. Nevertheless, screening patients on their general surface temperature does not provide any beneficial information in diagnosing or differentiating diseases unless a certain pathology is suspected in a particular area. DOI: http://dx.doi.org/10.18073/2358-4696/pajmt.v1n1p43-49
- Published
- 2014
99. A review of imaging methods in analysis of works of art: Thermographic imaging method in art analysis
- Author
-
R. Gr. Maev, Dmitry Gavrilov, and D.P. Almond
- Subjects
Set (abstract data type) ,Physics ,Range (mathematics) ,Engineering drawing ,Painting ,Art analysis ,Thermographic imaging ,General Physics and Astronomy - Abstract
This article discusses a number of modern techniques used for the analysis of works of art. The most widely used approaches as well as lesser known ones are outlined in terms of their applications and the kind of information on the condition of artworks that can be extracted. Special attention is paid to the method of thermographic analysis of works of pictorial art. The principles of the technique, various computational approaches, and safety concerns are discussed. A set of examples is provided for the demonstration of the capabilities of thermographic assessment, including a range of real canvas and panel paintings exhibited in museums and in private collections.
- Published
- 2014
100. A Case Report of Cold Hypersensitivity of Hands, Feet and Low Abdomen
- Author
-
Jin-Moo Lee, Jun-Bock Jang, Deok-Sang Hwang, Kyung-Sub Lee, Chang-Hoon Lee, and Young-Jin Yun
- Subjects
body regions ,medicine.medical_specialty ,medicine.anatomical_structure ,business.industry ,Sasang constitution ,Cold Hypersensitivity ,Thermographic imaging ,Medicine ,Abdomen ,business ,Surgery - Abstract
A Case Report of Cold Hypersensitivity of Hands, Feet and Low AbdomenYoung-Jin Yun, Jin-Moo Lee, Chang-Hoon LeeJun-Bock Jang, Kyung-Sub Lee, Deok-Sang HwangDept. of Oriental Gynecology, College of Oriental Medicine, Kyung-Hee UniversityPurpose: The purpose of this study is to report the effect on cold hype rsensitivity of hands, feet and low abdomen by Sasang constitutional treatme nt. For this purpose, the effects of a treatment were measured quantitatively using D igital Infrared Thermographic Imaging (DITI). Methods: It was a case of report, the patient was a 25-year-old female w hose chief complaint was cold hypersensitivity of hands and feet and low abdomem. We treated the patient with Sasang constitutional treatment, an d the effect of a treatment was evaluated by DITI. Results: After Sasang constitutional treatment, the differences of temp erature of hands, feet and low abdomem were decreased on DITI screening , respectively. Conclusions: Sasang constitutional treatment on cold hypersensitivity of ha nds, feet and low abdomen is effective. Further studies on diagnosis tools of low abdomen cold hypersensitivity are needed. Key Words: Digital Infrared Thermographic Imaging (DITI), Cold Hypersensi tivity of Hands, Feet and Low Abdomen, Sasang Constitution
- Published
- 2014
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.