Journal articles: 'Thermografic Camera'

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Yastikli, Naci, and Esra Guler. "Performance evaluation of thermographic cameras for photogrammetric documentation of historical buildings." Boletim de Ciências Geodésicas 19, no. 4 (December 2013): 711–28. http://dx.doi.org/10.1590/s1982-217020130004000012.

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Thermographic cameras record temperatures emitted by objects in the infrared region. These thermal images can be used for texture analysis and deformation caused by moisture and isolation problems. For accurate geometric survey of the deformations, the geometric calibration and performance evaluation of the thermographic camera should be conducted properly. In this study, an approach is proposed for the geometric calibration of the thermal cameras for the geometric survey of deformation caused by moisture. A 3D test object was designed and used for the geometric calibration and performance evaluation. The geometric calibration parameters, including focal length, position of principal point, and radial and tangential distortions, were determined for both the thermographic and the digital camera. The digital image rectification performance of the thermographic camera was tested for photogrammetric documentation of deformation caused by moisture. The obtained results from the thermographic camera were compared with the results from digital camera based on the experimental investigation performed on a study area.

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Dziarski, Krzysztof, and Joanna Parzych. "The solutions used for long wave thermographic cameras designed for observing elements in SMD housings." ITM Web of Conferences 19 (2018): 01038. http://dx.doi.org/10.1051/itmconf/20181901038.

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The article presents example detector matrices used in long wave thermographic cameras facilitating observations of elements enclosed in SMD housings. Infrared radiation detector matrices parameters and an optical system used in modern long wave thermographic cameras are discussed. The criteria for selecting camera parameters and their impact on the performed measurement are considered.

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Dolgov, I. M., M. G. Volovik, O. V. Nikitina, and T. P. Shkurat. "Thermography screening of thyroid gland: how to distinguish health from pathology." Medical alphabet 3, no. 29 (November 17, 2019): 32–39. http://dx.doi.org/10.33667/2078-5631-2019-3-29(404)-32-39.

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This research is organized to investigate if the thermal gradient (Tgrad) (difference between temperature maximum and minimum in the region of interest over thyroid gland on neck thermogramm) could be a marker of normal/ abnormal thyroid function and, if so, find out the cut-off value and check it screening validity.Materials and methods. Thermography examination was performed using a TVS-300 med (S-Petersburg, Russia) thermal imaging camera with a resolution of 384 × 288 pixels and sensitivity was <0.04 °C according to European Association of Thermology standards. Anterior neck thermografic images were performed and collected in cloud database, where, by mean of program tools, region of interest were marked and Tgrad calculated. Totally 1025 pts with different thyroid pathology (group 1: female 944, age 15–90 (55,4±15,8), male 81, age 14–86 (53,6±18,8)), and 395 healthy persons (group 2: male 324 age 17–26 (21,8±4,4), female 71 age 16–70т (34,6±12,7)) were investigated. To check the quality of the model another 314 persons (18 male and 296 female) were studied in screening mode.Results. Calculated Tgrad value was 1,65±0,53 °C, Ме 1,53(1,24; 1,90) and 0,98±0,23 °C, Me 1,01(0,82; 1,15) for group 1 and 2 accordingly. By mean of binary logistic regression analysis we found good correlation between Tgrad value and presence/absence of thyroid pathology: significance level р<0,0001, χ² = 838,84, df = 1, β 0 = 9,984, β 1 = –9,033. Area under curve in ROC analysis was 0,922 (95 % CI 0,908; 0,935), р<0,001; optimal cut off value for Tgrad was 1,21 °C for maximal sensitivity (79,8 %) and specificity (83,3 %). In screening evaluation, according to optimal cut-off value 1,2 °C for Tgrad , 82,2 % of cases were classified correctly: true-positive and true-negative results were achieved in 258 from 314 pts.Conclusion. Thermography test, based on Tgrad value calculation, could help to distinguish persons with normal and abnormal function of thyroid gland.

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König, Sebastian, Berndt Gutschwager, Richard Dieter Taubert, and Jörg Hollandt. "Metrological characterization and calibration of thermographic cameras for quantitative temperature measurement." Journal of Sensors and Sensor Systems 9, no. 2 (December 18, 2020): 425–42. http://dx.doi.org/10.5194/jsss-9-425-2020.

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Abstract. We present the metrological characterization and calibration of three different types of thermographic cameras for quantitative temperature measurement traceable to the International Temperature Scale (ITS-90). Relevant technical specifications – i.e., the non-uniformity of the pixel-to-pixel responsivity, the inhomogeneity equivalent temperature difference (IETD), the noise equivalent temperature difference (NETD), and the size-of-source effect (SSE) – are determined according to the requirements given in the series of Technical Directives VDI/VDE 5585. The measurements are performed with the camera calibration facility of the Physikalisch-Technische Bundesanstalt. The data reference method is applied for the determination and improvement of the non-uniformity, leading to an improved IETD for all three cameras. Finally, the cameras are calibrated according to the different procedures discussed in the VDI/VDE 5585 series. Results achieved with the different calibration procedures are compared for each type of camera and among the three cameras. An uncertainty budget for the calibration of each camera is given according to GUM (ISO, 1995) and VDI/VDE 5585.

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Guerra, Victor, Jaime R. Ticay-Rivas, Victor Alonso-Eugenio, and Rafael Perez-Jimenez. "Characterization and Performance of a Thermal Camera Communication System." Sensors 20, no. 11 (June 9, 2020): 3288. http://dx.doi.org/10.3390/s20113288.

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This work presents a novel communications technology named Thermal Camera Communication (TCC), which is analogous to Optical Camera Communication (OCC). Thermographic cameras and Peltier cells are proposed as receiver and transmitter, respectively, changing completely their usual field of application. Furthermore, a comprehensive characterization of the Peltier–Thermal camera pair is carried out, presenting their bandwidth, achievable data rate under On-Off-Keying (OOK) modulation, noise characteristics, and energy efficiency. A comparison against the current state-of-the-art OCC technology is also provided, showing that TCC is a promising technology suitable for sensor networks. The thorough analysis of TCC performed in this work shows that commercial Peltier cells can be re-thought under a communications viewpoint in order to improve their performance. This novel communication technology can be applied in environments such as the access to public transportation or buildings due to the new health emergency situation. The use of thermographic cameras will become massive and dual measurement and communication purposes could be considered for applications such as sensor networks, using a yet unexploited wavelength range.

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Nunak, N., K. Roonprasang, T. Suesut, and T. Nunak. "Emissivity Estimation Using Thermographic Camera." Advanced Materials Research 811 (September 2013): 380–87. http://dx.doi.org/10.4028/www.scientific.net/amr.811.380.

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This paper proposes a method based on the spectra response of IR detectors mounted on thermographic camera for emissivity measurement at various target surface temperatures, while the reflected temperature istaken into account, and also studies on the effect of surface roughness on the emissivity value. The emissivity (ε8-14μm) of general engineering material such as iron, stainless steel, brass, copper and aluminum obtained in this paper are in agreement with other literatures. Finally, results found that the roughness and emissivity of equipment increases with increasing of the operating time.

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Brili, Nika, Mirko Ficko, and Simon Klančnik. "Automatic Identification of Tool Wear Based on Thermography and a Convolutional Neural Network during the Turning Process." Sensors 21, no. 5 (March 9, 2021): 1917. http://dx.doi.org/10.3390/s21051917.

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This article presents a control system for a cutting tool condition supervision, which recognises tool wear automatically during turning. We used an infrared camera for process control, which—unlike common cameras—captures the thermographic state, in addition to the visual state of the process. Despite challenging environmental conditions (e.g., hot chips) we protected the camera and placed it right up to the cutting knife, so that machining could be observed closely. During the experiment constant cutting conditions were set for the dry machining of workpiece (low alloy carbon steel 1.7225 or 42CrMo4). To build a dataset of over 9000 images, we machined on a lathe with tool inserts of different wear levels. Using a convolutional neural network (CNN), we developed a model for tool wear and tool damage prediction. It determines the state of a cutting tool automatically (none, low, medium, high wear level), based on thermographic process data. The accuracy of classification was 99.55%, which affirms the adequacy of the proposed method. Such a system enables immediate action in the case of cutting tool wear or breakage, regardless of the operator’s knowledge and competence.

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Rochatka, Tomasz. "Measurements of heterogeneous heat streams permeating through damage to refrigerated bodies." Journal of Automation, Electronics and Electrical Engineering 1, no. 1 (December 31, 2019): 23–28. http://dx.doi.org/10.24136/jaeee.2019.003.

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This paper presents a description of the author's method of determining the heat flux penetrating the partition on the basis of a thermographic image. The method is based on a comparison of the temperatures of two areas, one of which is a heat-loaded area with a known heat flux (measured in this case by means of a heating box) and the other control area that was not heat-loaded. Based on preliminary tests, a "calibration" of the method based on differential measurements was carried out using a thermographic camera. Two areas were observed with a thermographic camera, one of which was thermally loaded with various heat fluxes and temperature increases were observed using a thermographic camera in relation to the surface temperature of an identical reference plate but not thermally loaded. As a result of "calibration", a relationship arose that linked the temperature difference with a registered thermographic camera to the heat flux measured with the heating box. The new method was validated by making subsequent series of measurements, this time with models of heat bridges that most often occur in refrigerated bodies and after determining the heat flux, the calculated values were compared with the results of measurements with a heating box.

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Švejdová, Kateřina, Miloslav Šoch, Anna Šimková, Luboš Zábranský, Pavel Novák, Jan Brouček, Bohuslav Čermák, Václav Pálka, and Kristýna Šimák-Líbalová. "MEASURING THE BODY SURFACE TEMPERATURE OF ANIMALS USING A THERMOGRAPHIC CAMERA." Acta Universitatis Cibiniensis. Series E: Food Technology 17, no. 2 (December 1, 2013): 99–106. http://dx.doi.org/10.2478/aucft-2013-0017.

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Abstract in this experiment it was used contactless measurement method using a thermographic camera. Surface temperatures were recorded from three different parts of the animal,(the surface of the core body, the eyes and the udde)r. The aim of this study was to determine how much the temperature values that are obtained using the thermographic camera are accurate.. Its accuracy depends on many factors such as particularly good settings of the thermographic camera, a microclimate of environment, an emissivity of measured object, the character and colour of the coat or the degree of muscles. It was also monitor the correlation of the measured surface temperatures with a rectal temperature, which is an indicative of the internal body temperature.

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Bieszczad, Grzegorz, and Mariusz Kastek. "Measurement of Thermal Behavior of Detector Array Surface with the Use of Microscopic Thermal Camera." Metrology and Measurement Systems 18, no. 4 (January 1, 2011): 679–90. http://dx.doi.org/10.2478/v10178-011-0064-6.

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Measurement of Thermal Behavior of Detector Array Surface with the Use of Microscopic Thermal Camera Modern infrared cameras are constructed with two main types of infrared detectors: photon detectors and thermal detectors. Because of economic reasons, vast numbers of modern thermal cameras are constructed with the use of infrared microbolometric detectors which belong to the group of thermal detectors. Thermal detectors detect incident infrared radiation by measuring changes of temperature on the surface of a special micro-bridge structure. Thermal detectors, like microbolometric detectors on one hand should be sensitive to changing temperature to accurately measure incoming infrared radiation from the observed scene, on the other hand there are many other phenomena that change the temperature of the detector and influence the overall response of the detector. In order to construct an accurate infrared camera, there is a need to evaluate these phenomena and quantify their influence. In the article the phenomenon of self heating due to the operation of the readout circuit is analyzed on an UL 03 19 1 detector. The theoretical analysis is compared with the results of conducted measurements. Measurements with a type SC7900VL thermographic camera were performed to measure the thermodynamic behavior of the UL 03 19 1 detector array.

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Ochoa, Joan, Emilio García, Eduardo Quiles, and Antonio Correcher. "Redundant Fault Diagnosis for Photovoltaic Systems Based on an IRT Low-Cost Sensor." Sensors 23, no. 3 (January 24, 2023): 1314. http://dx.doi.org/10.3390/s23031314.

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In large solar farms, supervision is an exhaustive task, often carried out manually by field technicians. Over time, automated or semi-automated fault detection and prevention methods in large photovoltaic plants are becoming increasingly common. The same does not apply when talking about small or medium-sized installations, where the cost of supervision at such level would mean total economic infeasibility. Although there are prevention protocols by suppliers, periodic inspections of the facilities by technicians do not ensure that faults such as the appearance of hot-spots are detected in time. That is why, nowadays, the only way of continuous supervision of a small or medium installation is often carried out by unqualified people and in a purely visual way. In this work, the development of a low-cost system prototype is proposed for the supervision of a medium or small photovoltaic installation based on the acquisition and treatment of thermographic images, with the aim of investigating the feasibility of an actual implementation. The work focuses on the system’s ability to detect hot-spots in supervised panels and successfully report detected faults. To achieve this goal, a low-cost thermal imaging camera is used for development, applying common image processing techniques, operating with OpenCV and MATLAB R2021b libraries. In this way, it is possible to demonstrate that it is achievable to successfully detect the hottest points of a photovoltaic (PV) installation with a much cheaper camera than the cameras used in today’s thermographic inspections, opening up the possibilities of creating a fully developed low-cost thermographic surveillance system.

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Mayer, Z., A. Epperlein, R. Volk, E. Vollmer, and F. Schultmann. "Comparison of building thermography approaches using terrestrial and aerial thermographic images." IOP Conference Series: Earth and Environmental Science 1078, no. 1 (September 1, 2022): 012026. http://dx.doi.org/10.1088/1755-1315/1078/1/012026.

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Abstract Thermography is commonly used for auditing buildings. Classical manual terrestrial thermography records images of individual buildings at a short distance. When auditing a large number of buildings (e.g. whole city districts) this approach reaches its limits. Using drones with thermographic cameras allows images to be recorded automatically from different angles, with faster speed and without violating property rights. However, an airborne camera has a significantly greater distance and more varied angles to a building compared to terrestrial thermography. To investigate the influence of these factors for building auditing, we perform a study evaluating seven different drone settings of varying flight speed, angle, and altitude. A comparison is drawn to manually recorded terrestrial thermographic images. While we find that a flight speed between 1m/s and 3m/s does not influence the thermographic quality, high flight altitudes and steep viewing angles lead to a significant reduction of visible details, contrast, and to falsified temperatures. A flight altitude of 12m over buildings is found to be the most suitable for the qualitative and quantitative analysis of rooftops and a qualitative analysis of façades. A flight altitude of 42m over buildings can only be used for qualitative audits with little detail.

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Zhang, J., J. Jung, G. Sohn, and M. Cohen. "THERMAL INFRARED INSPECTION OF ROOF INSULATION USING UNMANNED AERIAL VEHICLES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-1/W4 (August 27, 2015): 381–86. http://dx.doi.org/10.5194/isprsarchives-xl-1-w4-381-2015.

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UAVs equipped with high-resolution thermal cameras provide an excellent investigative tool used for a multitude of building-specific applications, including roof insulation inspection. We have presented in this study a relative thermographic calibration algorithm and a superpixel Markov Random Field model to address problems in thermal infrared inspection of roof insulation using UAVs. The relative thermographic radiometric calibration algorithm is designed to address the autogain problem of the thermal camera. Results show the algorithm can enhance the contrast between warm and cool areas on the roof surface in thermal images, and produces more constant thermal signatures of different roof insulations or surfaces, which could facilitate both visual interpretation and computer-based thermal anomaly detection. An automatic thermal anomaly detection algorithm based on superpixel Markov Random Field is proposed, which is more computationally efficient than pixel based MRF, and can potentially improve the production throughput capacity and increase the detection accuracy for thermal anomaly detection. Experimental results show the effectiveness of the proposed method.

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Cherchi, Vittorio, Umberto Baccarani, Luigi Vetrugno, Riccardo Pravisani, Tiziana Bove, Francesco Meroi, Giovanni Terrosu, and Gian Luigi Adani. "Early Graft Dysfunction Following Kidney Transplantation: Can Thermographic Imaging Play a Predictive Role?" Seminars in Cardiothoracic and Vascular Anesthesia 25, no. 3 (April 12, 2021): 196–99. http://dx.doi.org/10.1177/10892532211007270.

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The shortage of organs and the growing need for them over recent years have led to the adoption of less stringent donor acceptance criteria, resulting in the approval of marginal organs for transplant, especially from elderly donors. This implies a higher risk of graft dysfunction, a higher frequency of immunological and vascular complications, and shorter graft survival. Several strategies have been implemented in clinical practice to assess graft quality and suitability for transplantation. We have started to test the prospective intraoperative use of thermo-vision cameras during graft reperfusion. Images were acquired using the FLIR One Pro thermo-vision camera for android devices. We hypothesized that thermal images would give a better perspective about the quality of arterial perfusion and graft revascularization of the renal cortex. Thermo-vision cameras provide an easy-to-use, noninvasive, cost-effective tool for the global assessment of kidney graft cortical microcirculation in the immediate post-reperfusion period, providing additional data on the immediate viability and function of a graft.

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Zahradník, D. "ROOF LEAK DETECTION BY THERMOGRAPHY OF AS-BUILT BIM." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVI-5/W1-2022 (February 3, 2022): 251–56. http://dx.doi.org/10.5194/isprs-archives-xlvi-5-w1-2022-251-2022.

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Abstract. The horizontal roofs of industrial buildings are the weakest part of a structure. Imperfect design of horizontal roofs causes roof leakage. For roofs with a large surface area, locating leakage points is very difficult. The problem is solved by aerial thermography using drones. Modern high-resolution thermal cameras make it possible to detect roof leaks. By processing the RGB camera and thermal camera data, a thermal mesh model is created for implementation into the BIM. Building information models are data managers throughout the life cycle of buildings. BIM helps prevent clashes, improve collaboration and record building information from IOT devices. For building maintenance, the results of thermography need to be implemented in BIM. BIM managers create a roof repair plan based on the severity of the roof leakage. This paper proposes a methodology to implement the results of roof leak detection, starting from data collection and continuing with the processing of geometric and thermographic data and finalizes with implementation.

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Haraszti, Ferenc. "Thermographic Camera Application for Galvanic corrosion detection." Műszaki Tudományos Közlemények 11, no. 1 (October 1, 2019): 77–80. http://dx.doi.org/10.33894/mtk-2019.11.15.

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Abstract The components of electric connections have a tenancy to corrosion. We can observe a galvanic corrosion process hazard in case of the contact between different electron potential metals. This corrosion process impairs the mechanical properties and the connection through increased resistance. The conduction parameters decrease in some parts that are under high load because of the rise in heat. This heat effect can be undetectable. By thermographic camera experiments, we can reveal this irregularity at an early stage. In this work, we present this investigation and the associated problems.

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Маркіна, О. М., В. І. Дунаєвський, В. П. Маслов, and Н. В. Качур. "THERMOGRAPHIC STUDY TELEVISION CAMERA WITH CCD MATRIX." Sensor Electronics and Microsystem Technologies 11, no. 4 (October 1, 2014): 103–8. http://dx.doi.org/10.18524/1815-7459.2014.4.109035.

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Bison, Paolo, Giovanni Ferrarini, and Gabriele Zanon. "Thermographic Monitoring of Laser Cutting Machine." Proceedings 27, no. 1 (September 23, 2019): 28. http://dx.doi.org/10.3390/proceedings2019027028.

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Computer Numerical Controlled (CNC) laser cutting tools are developing as an alternative to conventional cutting systems thanks to increased accuracy, non-contact processing, higher productivity, less energy demand. An IR camera is utilized to monitor the laser cutting process of a steel plate. Even though the process is very complicated an analytical solution of the temperature field generated on a slab by a point source moving along one direction of the plate surface is provided in order to interpret the temperature field experimentally obtained by the IR camera.

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Mayer, Zoe, Andres Epperlein, Elena Vollmer, Rebekka Volk, and Frank Schultmann. "Investigating the Quality of UAV-Based Images for the Thermographic Analysis of Buildings." Remote Sensing 15, no. 2 (January 4, 2023): 301. http://dx.doi.org/10.3390/rs15020301.

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Thermography for building audits is commonly carried out by means of terrestrial recording processes with static cameras. The implementation of drones to automatically acquire images from various perspectives can speed up and facilitate the procedure but requires higher recording distances, utilizes changing recording angles and has to contend with the effects of movement during image capture. This study investigates the influence of different drone settings on the quality of thermographic images for building audits in comparison to ground-based acquisition. To this end, several buildings are photographically captured via unmanned aerial vehicle and classical terrestrial means to generate a dataset of 968 images in total. These are analyzed and compared according to five quality criteria that are explicitly chosen for this study to establish best-practice rules for thermal image acquisition. We discover that flight speeds of up to 5 m/s have no visible effects on the image quality. The combination of smaller distances (22 m above a building) and a 45° camera angle are found to allow for both the qualitative and quantitative analysis of rooftops as well as a qualitative screening of building façades. Greater distances of 42 m between camera and building may expedite the acquisition procedure for larger-scaled district coverage but cannot be relied upon for thermal analyses beyond qualitative studies.

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Skorupka, Zbigniew. "Thermographic Camera Use in Brake Oriented Friction Materials Tests / Użycie Kamery Termowizyjnej w Badaniach Hamulcowych Materiałów Ciernych." Journal of KONBiN 33, no. 1 (September 1, 2015): 81–90. http://dx.doi.org/10.1515/jok-2015-0006.

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Abstract Friction brake temperature due to its influence on brakes’ operation is subject to many test and studies. Measurements methods of this important brake parameter are being continuously developed. In order to withstand difficulty in temperature evaluation in full brake system as well as in isolated friction pair is use of contactless measurement methods. Currently, the most widespread contactless testing method of the thermal effects is to measure infrared emission by pyrometers or thermographic (infrared) cameras. Thermal imaging method wasn’t used so far during aviation brake materials usefulness evaluation and certification testing performed in Instytut Lotnictwa Landing Gear Laboratory. In this paper, author described performed friction materials tests which were recorded with thermal imaging camera as well as evaluated usefulness of the method by comparing its accuracy to thermocouple measurement.

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Haraszti, F., and T. Kovacs. "Galvanic Corrosion Occurs Heat Experiments by Thermographic Camera." Journal of Physics: Conference Series 1045 (June 2018): 012016. http://dx.doi.org/10.1088/1742-6596/1045/1/012016.

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Macher, H., M. Boudhaim, P. Grussenmeyer, M. Siroux, and T. Landes. "COMBINATION OF THERMAL AND GEOMETRIC INFORMATION FOR BIM ENRICHMENT." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W15 (August 23, 2019): 719–25. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w15-719-2019.

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<p><strong>Abstract.</strong> In the context of building renovation, infrared (IR) cameras are widely used to perform the energy audit of buildings. They allow analysing precisely the energetic performances of existing buildings and thermal analyses represent a key step for the reduction of energy consumption. They are also used to assess the thermal comfort of people living or working in a building. Building Information Models (BIM) are widespread to plan the rehabilitation of existing buildings and laser scanning is now commonly used to capture the geometry of buildings for as-built BIM creation. The combination of thermographic and geometric data presents a high number and variety of applications (Lagüela and Díaz-Vilariño, 2016). However, geometric and thermal information are generally acquired separately by different building stakeholders and thermal analyses are performed with independence of geometry. In this paper, the combination of thermal and geometric information is investigated for indoor of buildings. The aim of the project is to create 3D thermographic point clouds based on data acquired by a laser scanner and a thermal camera. Based on these point clouds, BIM models might be enriched with thermal information through the scan-to-BIM process.</p>

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Zhao, Yang, Yufan Han, Cheng Chen, and Hyungjoon Seo. "Crack Detection in Frozen Soils Using Infrared Thermographic Camera." Sensors 22, no. 3 (January 24, 2022): 885. http://dx.doi.org/10.3390/s22030885.

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Frozen soils are encountered on construction sites in the polar regions or regions where artificial frozen ground (AFG) methods are used. Thus, efficient ways to monitor the behavior and potential failure of frozen soils are currently in demand. The advancement of thermographic technology presents an alternative solution as deformation occurring in frozen soils generate heat via inter-particle friction, and thus a subsequent increase in temperature. In this research, uniaxial compression tests were conducted on cylindrical frozen soil specimens of three types, namely clay, sand, and gravel. During the tests, surface temperature profiles of the specimens were recorded through an infrared video camera. The thermographic videos were analyzed, and subsequent results showed that temperature increases caused by frictional heat could be observed in all three frozen soil specimens. Therefore, increases in temperature can be deemed as an indicator for the potential failure of frozen soils and this method is applicable for monitoring purposes.

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Władysiak, R., and A. Kozuń. "An Application for Infrared Camera in Analyzing of the Solidification Process of Al-Si Alloy." Archives of Foundry Engineering 15, no. 3 (September 1, 2015): 81–84. http://dx.doi.org/10.1515/afe-2015-0065.

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Abstract The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler TDA-10, that was cooling down in ambient air. The study was conducted for silumin AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of neareutectic silumin.

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Lizer, Tomasz, Michał Remer, Grzegorz Sobieraj, Maciej Psarski, Daniel Pawlak, and Grzegorz Celichowski. "Droplet Impact in Icing Conditions – Experimental Study for WE 540." Archive of Mechanical Engineering 64, no. 2 (June 1, 2017): 165–75. http://dx.doi.org/10.1515/meceng-2017-0010.

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Abstract The work presents investigation on the water droplet impingement at a substrate with three different surface coating. The experiments are carried out for two temperatures of the surface: 23°C (room temperature) and −10°C. The water droplet contact is recorded via ultra-fast camera and simultaneously via fast thermographic camera. The wetting properties are changing for subzero temperatures of substrates.

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Kim, Jeong Guk, Sung Tae Kwon, Sung Cheol Yoon, and Byeong Choon Goo. "Infrared Thermographic Analysis of Railway Brake Disc during Braking." Key Engineering Materials 488-489 (September 2011): 597–600. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.597.

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The temperature monitoring on the surface of the railway brake disc was performed using high-speed infrared (IR) camera. The railway brake disc was developed for disc braking of maximum train speed of 180 km/h. The braking tests were conducted with a full scale dynamometer, and a high-speed infrared camera was employed to monitor temperature evolution on the brake disc during braking operation. The high-speed IR camera provides the measurement of temperature change during braking as well as the images of temperature contour on the brake disc surface. In general, the hot spot generation has been considered the main degradation mechanism in railway brake disc. In this investigation, damage evolution due to generation of hot spots on railway brake disc was investigated using the infrared thermography method.

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Władysiak, R., A. Kozuń, and T. Pacyniak. "Examining the Possibilities of Analyzing the Solidification Process of Al-Si Alloy with the Infrared Camera." Archives of Foundry Engineering 16, no. 1 (March 1, 2016): 89–94. http://dx.doi.org/10.1515/afe-2016-0009.

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Abstract The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler ATD-10, that was cooling down in ambient air. The study was conducted for silumins AlSi8 and AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of hypo-and neareutectic silumins.

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Kim, Jeong Guk, Seung Koo Baek, Chang Young Lee, and Sung Cheol Yoon. "Deterioration and Thermographic Analyses of Electrical Units in Diesel Locomotive." Key Engineering Materials 417-418 (October 2009): 729–32. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.729.

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The electrical units of diesel electric locomotives, which were used for over 30 years, were characterized for deterioration evaluation through insulation resistance measurement, degradation testing, and infrared thermography method. Especially, an infrared camera and thermocouples were employed for the evaluation. The thermocouples were attached on high-voltage cables connected to traction motors, for in-situ measurement of abnormal heating during test running. After test running, the thermographic images were obtained for the inspection of high-voltage cables using the infrared camera. The thermographic results were quantitatively analyzed, and compared with temperature changes during running. In this investigation, various analysis techniques for the safety characterization of diesel electric locomotives have been introduced, and the analysis results have been used to provide the deterioration or wear information in current locomotive systems.

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Cruz-Segura, Alejandro, María P. Cruz-Domínguez, Luis J. Jara, Ángel Miliar-García, Alejandro Hernández-Soler, Pedro Grajeda-López, Michel A. Martínez-Bencomo, and Daniel H. Montes-Cortés. "Early Detection of Vascular Obstruction in Microvascular Flaps Using a Thermographic Camera." Journal of Reconstructive Microsurgery 35, no. 07 (May 8, 2019): 541–48. http://dx.doi.org/10.1055/s-0039-1688749.

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Background In microsurgical reconstruction, vascular obstruction occurs in approximately 20% of patients. Close monitoring is central to their care. Clinical/Doppler detection of vascular obstruction could be enhanced by thermography. Methods A diagnostic test design included consecutive cases of hospitalized patients, ≥18 years old, who underwent surgery with free flaps. Two researchers separately evaluated patients with clinical/Doppler methods and thermographic camera hourly for 24 hours, every 2 hours for the next 24 hours, and then every 3 hours until discharge. The gold standard was visualization of thrombus or vascular obstruction during surgical reintervention. Sensitivity, specificity, positive/negative predictive value (PPV/NPV), and a delta temperature receiver operating characteristic (ROC) curve were calculated. Results A total of 2,364 tests were performed with a thermographic camera in 40 patients (31 females, 9 males) aged 50.12 ± 9.7 years. There were 28 deep inferior epigastric perforator, 5 anterolateral thigh, 3 radial, 2 scapular, 1 fibular, and 1 anteromedial thigh flaps included. Six (15%) had postoperative vascular obstruction (5 venous and 1 arterial). One flap developed partial necrosis and one total necrosis (overall survival 97.5%). ROC curve (area 0.97) showed the best results at ≥ 1.8°C of difference to the surrounding skin. Considering two consecutive positive evaluations, the sensitivity was 93%, specificity 96%, PPV 57%, and NPV 99%. The thermal imaging camera allows to identify the obstruction between 2 and 12 hours before the clinical method. Conclusion Utilizing a thermographic camera can reduce detection time of vascular obstruction by several hours in microvascular free flaps that include the cutaneous island. This method proves useful for early diagnosis of postoperative vascular obstruction.

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Hoffmann, Nico, Florian Weidner, Peter Urban, Tobias Meyer, Christian Schnabel, Yordan Radev, Gabriele Schackert, et al. "Framework for 2D-3D image fusion of infrared thermography with preoperative MRI." Biomedical Engineering / Biomedizinische Technik 62, no. 6 (November 27, 2017): 599–607. http://dx.doi.org/10.1515/bmt-2016-0075.

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AbstractMultimodal medical image fusion combines information of one or more images in order to improve the diagnostic value. While previous applications mainly focus on merging images from computed tomography, magnetic resonance imaging (MRI), ultrasonic and single-photon emission computed tomography, we propose a novel approach for the registration and fusion of preoperative 3D MRI with intraoperative 2D infrared thermography. Image-guided neurosurgeries are based on neuronavigation systems, which further allow us track the position and orientation of arbitrary cameras. Hereby, we are able to relate the 2D coordinate system of the infrared camera with the 3D MRI coordinate system. The registered image data are now combined by calibration-based image fusion in order to map our intraoperative 2D thermographic images onto the respective brain surface recovered from preoperative MRI. In extensive accuracy measurements, we found that the proposed framework achieves a mean accuracy of 2.46 mm.

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Sawicki, Krzysztof, Grzegorz Bieszczad, and Tomasz Sosnowski. "ThermoSteg—Covert Channel for Microbolometer Thermographic Cameras." Sensors 21, no. 19 (September 24, 2021): 6395. http://dx.doi.org/10.3390/s21196395.

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The article presents a new concept—steganography in thermography. Steganography is a technique of hiding information in a non-obvious way and belongs to sciences related to information security. The proposed method, called ThermoSteg, uses a modification of one of the parameters of the thermal imaging camera—integration time—to embed the signal containing hidden information. Integration time changing makes the microbolometer array heat up while reading the sensors. The covert information can be extracted from the stream of thermograms recorded by another thermal camera that observes the first one. The covert channel created with the ThermoSteg method allows the transmission of covert data using a thermal sensor as a wireless data transmitter. This article describes a physical phenomenon that is exploited by the ThermoSteg method and two proposed methods of covert data extraction, and presents the results of experiments.

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Chan, Lung-Sang, Giselle T. Y. Cheung, Ian J. Lauder, and Cyrus R. Kumana. "Screening for Fever by Remote-sensing Infrared Thermographic Camera." Journal of Travel Medicine 11, no. 5 (March 8, 2006): 273–79. http://dx.doi.org/10.2310/7060.2004.19102.

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Marina, Cristina Nicoleta, Laura Raducu, Valeriu Ardeleanu, Ioan Petre Florescu, and Cristian Radu Jecan. "Thermographic camera in traumatology, diabetic foot and reconstructive procedures." Injury 51 (December 2020): S117—S120. http://dx.doi.org/10.1016/j.injury.2020.03.020.

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Dziarski, Krzysztof, and Arkadiusz Hulewicz. "Determination of Transmittance of IR Windows made of CaF2 within Operational Temperatures of Electric Devices." Pomiary Automatyka Robotyka 25, no. 4 (December 7, 2021): 25–30. http://dx.doi.org/10.14313/par_242/25.

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The article presents summaries of works which have resulted in the presentation of a formula making it possible to determine an approximate transmittance of an IR window used in thermographic measurements of electric device temperatures. The equation was formulated after analysing components of the IR radiation reaching the camera lens in case when an IR window was not used and when an IR window was used. Conditions prevailing in course of the thermographic temperature measurement of electric devices contained in the switchgear were recreated in the performance of the works. The measurement system which was used in the experiment has been presented. Components of the IR radiation reaching the camera lens in case when the IR window was used and when the IR window was not used have been discussed. The obtained transmittance results of windows VPFR-75 FRK100-CL have been compared against data from literary sources.

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Muzika, Lukáš, Jiří Tesař, Michal Švantner, Jiří Skála, and Petra Honnerová. "Comparison of Methods for Emissivity Influence Suppression on Thermographic Data." Buildings 13, no. 1 (December 28, 2022): 69. http://dx.doi.org/10.3390/buildings13010069.

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Emissivity is a crucial parameter for a quantitative thermography measurement. It influences measured temperature using an infrared camera. Typically, the emissivity is handled by infrared camera software but often for more complex tasks—e.g., setting and controlling the emissivity of individual pixels—a custom-made solution must be created. This can be especially beneficial for active thermography measurement and dynamic building inspection by infrared thermography as many surfaces of interest with different emissivity occur in thermographic data. In literature, one technique for suppressing emissivity occurs most often—the technique used by infrared camera manufacturers. Nonetheless, two other techniques are marginally mentioned. The most complex technique is the one used by infrared camera manufacturers, which allows many parameters to be set, but it is difficult to incorporate it into own solution. In contrast, the second one can be adapted easily, and it uses the relationship between emissivity and the fourth power of temperatures. The third one is a scarcely used technique that occurs for some active thermography measurements, in which a thermographic sequence in counts is divided by a frame when temperature equilibrium is reached. The main goal of this article is to compare these individual techniques from the point of view of the accuracy and possibility of use. The experiment showed that all three methods can be successfully used for the suppression of emissivity influence.

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Villafuerte-Nuñez, A. E., A. C. Téllez-Anguiano, O. Hernández-Díaz, R. Rodríguez-Vera, J. A. Gutiérrez-Gnecchi, and J. L. Salazar-Martínez. "Facial Edema Evaluation Using Digital Image Processing." Discrete Dynamics in Nature and Society 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/927843.

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The main objective of the facial edema evaluation is providing the needed information to determine the effectiveness of the anti-inflammatory drugs in development. This paper presents a system that measures the four main variables present in facial edemas: trismus, blush (coloration), temperature, and inflammation. Measurements are obtained by using image processing and the combination of different devices such as a projector, a PC, a digital camera, a thermographic camera, and a cephalostat. Data analysis and processing are performed using MATLAB. Facial inflammation is measured by comparing three-dimensional reconstructions of inflammatory variations using the fringe projection technique. Trismus is measured by converting pixels to centimeters in a digitally obtained image of an open mouth. Blushing changes are measured by obtaining and comparing the RGB histograms from facial edema images at different times. Finally, temperature changes are measured using a thermographic camera. Some tests using controlled measurements of every variable are presented in this paper. The results allow evaluating the measurement system before its use in a real test, using the pain model approved by the US Food and Drug Administration (FDA), which consists in extracting the third molar to generate the facial edema.

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Dziarski, Krzysztof, and Arkadiusz Hulewicz. "Uncertainty of Thermographic Temperature Measurement with an Additional close-up Lens." Measurement Science Review 21, no. 6 (October 26, 2021): 185–90. http://dx.doi.org/10.2478/msr-2021-0025.

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Abstract The thermographic temperature measurement is burdened with uncertainty. This non-contact temperature measurement method makes it possible to measure the temperature of the electrical device under load. When the observed object is small (a few square millimeters) the spatial resolution of the thermographic cameras is often insufficient. In this case, the use of the additional macro lens is needed. After using an additional lens, the uncertainty of the thermographic measurement is different from the uncertainty of thermographic measurement without an additional lens. The values of the uncertainty contributions depend on the conditions during the measurement and the used methodology. The authors constructed an uncertainty budget of thermographic temperature measurement with an additional macro lens, based on EA-4/02 (European Accreditation publications). The uncertainty contributions were also calculated. On the basis of the calculated values of the uncertainty contributions, it was determined which factor had the greatest impact on the value of the thermographic temperature measurement with an additional lens.

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Bleul, Ulrich, Michael Hässig, and Fabienne Kluser. "Screening of febrile cows using a small handheld infrared thermography device." Tierärztliche Praxis Ausgabe G: Großtiere / Nutztiere 49, no. 01 (February 2021): 12–20. http://dx.doi.org/10.1055/a-1307-9993.

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Abstract Objective As dairy herds increase in size, close monitoring of health becomes a necessity, but this is expensive and labour-intensive. Early detection of febrile diseases is essential for economical and welfare reasons and to prevent the spread of disease. The goal of this study was therefore to evaluate a mobile, non-invasive technique for measuring the body temperature of cows that precludes the need for restraint of the animals. Materials and methods An infrared thermographic imaging camera installed on a smart phone was used to measure the surface temperature of cows. In experiment 1, a metal block heated to defined temperatures was used to obtain infrared thermographic measurements (THM). The accuracy of THM made at different distances from the block and at 2 different ambient temperatures was determined. In experiment 2, non-febrile cows underwent infrared thermographic imaging, and the body regions with the highest correlations between thermographic and rectal temperature were identified. In experiment 3, THM were made in febrile and neighbouring non-febrile cows. Results In experiment 1, the thermographic and true temperatures of the block had the strongest relationships at 0.5 and 1.0 m (r = 0.98). The ambient temperature had a significant effect on the THM, which had larger variations and greater deviations from the block temperature at 14.8 °C than at 23.8 °C. In experiment 2, the maximum temperature at the eye (r = 0.37), THM at the muzzle (r = 0.28) and the medial canthus (r = 0.27) showed the strongest relationships with the rectal temperature. After correcting the THM with the mean difference between thermographic and rectal temperatures of the non-febrile cows, sensitivities of 88, 90 and 82 %, respectively, were calculated for THM at the muzzle, eye and medial canthus in febrile cows in experiment 3. The corresponding specificities were 6, 23 and 32 %. Conclusion and clinical relevance Based on the low specificities of the infrared THM, the thermographic imaging camera has limited usefulness for the mass screening of dairy cows for febrile conditions. Cattle falsely identified as febrile need to be separated, caught and re-examined, which causes unnecessary stress to the animal and increases labour input.

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San Juán, Manuel, Óscar Martín, Francisco Javier Santos, Pilar de Tiedra, Roberto López, and Raúl Mahillo-Isla. "Thermography IR Applied to Analyse the Influence of the Deformation Speed in the Forming Process." Key Engineering Materials 615 (June 2014): 76–81. http://dx.doi.org/10.4028/www.scientific.net/kem.615.76.

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This work presents the development of an experimental study which aims to establish arelationship of temperature variations, deformation speeds and the possible microstructural changes in the AISI 304 stainless steel. For this, an IR thermographic camera recorded serveral tensile test with different deformation speeds.

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Reichstein, Torben, Alois Peter Schaffarczyk, Christoph Dollinger, Nicolas Balaresque, Erich Schülein, Clemens Jauch, and Andreas Fischer. "Investigation of Laminar–Turbulent Transition on a Rotating Wind-Turbine Blade of Multimegawatt Class with Thermography and Microphone Array." Energies 12, no. 11 (June 1, 2019): 2102. http://dx.doi.org/10.3390/en12112102.

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Knowledge about laminar–turbulent transition on operating multi megawatt wind turbine (WT) blades needs sophisticated equipment like hot films or microphone arrays. Contrarily, thermographic pictures can easily be taken from the ground, and temperature differences indicate different states of the boundary layer. Accuracy, however, is still an open question, so that an aerodynamic glove, known from experimental research on airplanes, was used to classify the boundary-layer state of a 2 megawatt WT blade operating in the northern part of Schleswig-Holstein, Germany. State-of-the-art equipment for measuring static surface pressure was used for monitoring lift distribution. To distinguish the laminar and turbulent parts of the boundary layer (suction side only), 48 microphones were applied together with ground-based thermographic cameras from two teams. Additionally, an optical camera mounted on the hub was used to survey vibrations. During start-up (SU) (from 0 to 9 rpm), extended but irregularly shaped regions of a laminar-boundary layer were observed that had the same extension measured both with microphones and thermography. When an approximately constant rotor rotation (9 rpm corresponding to approximately 6 m/s wind speed) was achieved, flow transition was visible at the expected position of 40% chord length on the rotor blade, which was fouled with dense turbulent wedges, and an almost complete turbulent state on the glove was detected. In all observations, quantitative determination of flow-transition positions from thermography and microphones agreed well within their accuracy of less than 1%.

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Hulewicz, Arkadiusz, Krzysztof Dziarski, and Grzegorz Dombek. "The Solution for the Thermographic Measurement of the Temperature of a Small Object." Sensors 21, no. 15 (July 23, 2021): 5000. http://dx.doi.org/10.3390/s21155000.

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This article describes the measuring system and the influence of selected factors on the accuracy of thermographic temperature measurement using a macrolens. This method enables thermographic measurement of the temperature of a small object with an area of square millimeters as, e.g., electronic elements. Damage to electronic components is often preceded by a rise in temperature, and an effective way to diagnose such components is the use of a thermographic camera. The ability to diagnose a device under full load makes thermography a very practical method that allows us to assess the condition of the device during operation. The accuracy of such a measurement depends on the conditions in which it is carried out. The incorrect selection of at least one parameter compensating the influence of the factor occurring during the measurement may cause the indicated value to differ from the correct value. This paper presents the basic issues linked to thermographic measurements and highlights the sources of errors. A measuring stand which enables the assessment of the influence of selected factors on the accuracy of thermographic measurement of electronic elements with the use of a macrolens is presented.

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Rahman, Munirah Ab. "Fever Monitoring and Alert System for Children using Thermographic Camera." International Journal of Advanced Trends in Computer Science and Engineering 9, no. 1.1 S I (February 15, 2020): 316–27. http://dx.doi.org/10.30534/ijatcse/2020/5591.12020.

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Piskorz, Jolanta, Gustaw Wójcik, Joanna Iłżecka, and Włodzimierz Bulikowski. "THE USE OF THERMOGRAPHIC CAMERA IN STROKE DIAGNOSTICS - INTRODUCTORY REPORT." Health Problems of Civilization 1 (2016): 14–19. http://dx.doi.org/10.5114/hpc.2016.58203.

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Shimoji, H., T. Todaka, and S. Aihara. "A thermographic camera method for measuring the core loss distribution." Journal of Magnetism and Magnetic Materials 505 (July 2020): 166679. http://dx.doi.org/10.1016/j.jmmm.2020.166679.

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Lee, Chijoo, and Hyungjun Yang. "A system to detect potential fires using a thermographic camera." Natural Hazards 92, no. 1 (February 28, 2018): 511–23. http://dx.doi.org/10.1007/s11069-018-3224-0.

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Lee, Joon Hyun, and Jeong Guk Kim. "Thermographic Damage Detection of Ceramic Matrix Composites During Tension Testing." Key Engineering Materials 321-323 (October 2006): 825–30. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.825.

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The fracture behavior of Nicalon fiber reinforced calcium aluminosilicate (CAS) glass-ceramic matrix composites (Nicalon/CAS) was investigated with the aid of a nondestructive evaluation (NDE) technique. Infrared (IR) thermography was employed for unidirectional Nicalon/CAS composite specimens. During tensile testing, an IR camera was used for in-situ monitoring of progressive damages of Nicalon/CAS samples. The IR camera provided the temperature changes during tensile testing. Microstructural characterization using scanning electron microscopy (SEM) was performed to investigate the fracture mechanisms of Nicalon/CAS composites. In this investigation, the thermographic NDE technique was used to facilitate a better understanding of the fracture mechanisms of the Nicalon/CAS composites during tensile testing.

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Janošíková, Martina, Cyril Neumann, and Jaroslav Čítek. "First case study of thermographic evaluation of a random sample of saddles in the Czech Republic." Czech Journal of Animal Science 67, No. 1 (January 20, 2022): 1–7. http://dx.doi.org/10.17221/112/2021-cjas.

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The aim of this study was to assess the prevalence of correct saddle seating in the Czech Republic using a thermographic camera. Eighty-five randomly selected equestrian saddles were tested and evaluated. They were observed in 129 uses. Saddles of different manufacturers were evaluated after 25 min of training. Thermal images were taken under constant conditions from a distance of 1 m. The camera emissivity was 0.95 with a reflected temperature range of 26–37 °C. The maximum contact value of the saddle panels with the horse’s body was 81.34% of their surface area. In all cases of measurement, the saddle panels showed asymmetry of contact with a range of detected values from 0.32% to 30.46% (P < 0.001). In 20.16% of cases, the contact was measured in the spinal canal region (min. 0%, max. 67.5%). In 7.75% of cases, saddle bridge was detected. None of the saddles tested showed 100% fitting (P < 0.001). Saddles with contact in the spinal canal and a bridge at the same time were completely excluded from the evaluation. The saddle panel contact exceeding 70% of the area and a tolerance for asymmetry not exceeding 5% were regarded as suitable for use. In considering a combination of all these parameters, only nine out of 129 cases of use were fully compliant. No correlation between saddle age and occurrence of the observed defects was demonstrated. It was found that thermographic evaluation can be proposed as a tool to standardise the assessment of saddle suitability prior to its use for a specific horse.

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Stanev, Evgeni, Maria Dencheva, Maya Lyapina, and Payam Forghani. "Thermographic examination of prick test reactions with local anesthetic." Journal of Thermal Analysis and Calorimetry 140, no. 1 (September 21, 2019): 225–31. http://dx.doi.org/10.1007/s10973-019-08814-4.

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Abstract In allergology, skin diagnostic tests are divided into epicutaneous, cutaneous and intracutaneous. The prick test is one of the cutaneous tests used most often for the diagnosis of hypersensitivity to local anesthetics. In the case of hypersensitivity to the examined anesthetic and reaction to the histamine-containing solution (positive control), inflammation appears with an increase in the local temperature. This warming can be detected objectively with a thermal camera and can be used in the diagnostic process. This study was used to examine the capabilities of the infrared thermography application, in the prick test of both men and women, by comparing temperature changes and the intensity of allergic inflammation in the positive and negative controls in addition with a negative reaction to an allergen. A group of 115 patients—55 male (52%) and 60 female (48%), are included. All are examined for hypersensitivity to Mepivastesin, together with the positive and negative control. Skin temperature changes of the skin were examined with FLIR A320 thermal camera and the FLIR Reporter Professional software 2013—application used to process the thermal camera images and data. The statistical analysis shows a marked temperature difference between men and women. Similarities in temperature values are detected between the negative reactions to dental anesthetic and the negative control. However, the latter substantially differs from the data obtained with the positive control. Results of the research indicate the possible applications of the thermography diagnostics in evaluation of the prick test results.

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Yastikli, N., and E. Guler. "PERFORMANCE EVALUATION OF THERMOGRAPHIC CAMERAS FOR PHOTOGRAMMETRIC MEASUREMENTS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-1/W1 (May 2, 2013): 383–87. http://dx.doi.org/10.5194/isprsarchives-xl-1-w1-383-2013.

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López-Tamayo, Silvia, Ines Rubira, Marcelo De las Heras, Enrique Castells, and Delia Lacasta. "Use of thermography for the diagnosis of chronic proliferative rhinitis in sheep and its application in the differential diagnosis of the first case affecting the dorsal turbinate." Veterinary Record Case Reports 8, no. 2 (May 2020): e001070. http://dx.doi.org/10.1136/vetreccr-2020-001070.

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Chronic proliferative rhinitis (CPR) is a fatal prognosis upper respiratory tract disease that affects sheep and is associated with Salmonella enterica subspecies diarizonae serotype 61:k:1, 5, (7). It may be unilateral or bilateral, and although minor changes have been seen in dorsal turbinate, the ventral turbinate is always affected, which makes it possible to observe the proliferative tissue emerging from the nares.The following publication describes the case of an ewe severely affected by a bilateral inflammatory process of the upper respiratory tract. S enterica subspecies diarizonae was isolated from nasal swabs; however, the hottest area observed by a thermal imaging camera was not the ventral area, as usually seen in this process, but the middle area, where the dorsal turbinate is located. In addition, no proliferative tissue was seen through the nostril. At postmortem examination, it was confirmed that CPR seriously affected, for the first time, the dorsal turbinate and ethmoidal areas. Thermographic cameras are useful tools for the diagnosis of upper respiratory tract diseases in sheep.

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Journal articles on the topic 'Thermografic Camera'

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