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https://www.readbyqxmd.com/read/29351240/machine-learning-and-infrared-thermography-for-fiber-orientation-assessment-on-randomly-oriented-strands-parts
#1
Henrique Fernandes, Hai Zhang, Alisson Figueiredo, Fernando Malheiros, Luis Henrique Ignacio, Stefano Sfarra, Clemente Ibarra-Castanedo, Gilmar Guimaraes, Xavier Maldague
The use of fiber reinforced materials such as randomly-oriented strands has grown in recent years, especially for manufacturing of aerospace composite structures. This growth is mainly due to their advantageous properties: they are lighter and more resistant to corrosion when compared to metals and are more easily shaped than continuous fiber composites. The resistance and stiffness of these materials are directly related to their fiber orientation. Thus, efficient approaches to assess their fiber orientation are in demand...
January 19, 2018: Sensors
https://www.readbyqxmd.com/read/29349425/assessment-of-lower-extremity-ischemia-using-smartphone-thermographic-imaging
#2
Peter H Lin, Marius Saines
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...
December 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29349394/infrared-thermography-in-the-diagnosis-and-management-of-vasculitis
#3
Peter H Lin, Angela Echeverria, Mun J Poi
Vasculitis is a clinical condition with associated diagnostic challenges due to nonspecific symptoms and lack of a confirmatory imaging modality. We report a case of a 39-year-old female patient who developed generalized malaise, lethargy, and headache. Laboratory evaluation showed elevated inflammatory markers. Conventional imaging studies including computed tomography and carotid duplex ultrasound were unremarkable. Infrared thermography revealed enhanced thermographic signals in the left carotid artery and aortic arch...
September 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29340345/intraosseous-temperature-changes-during-implant-site-preparation-in-vitro-comparison-of-thermocouples-and-infrared-thermography
#4
Sönke Harder, Christopher Egert, Sandra Freitag-Wolf, Christian Mehl, Matthias Kern
PURPOSE: Implant-supported dental prostheses are based on the principle of osseointegration, and the success of dental implantation depends on adequate formation of this intimate bone-to-implant contact. The application of heat during the drilling procedure leads to a rise in intraosseous temperature at the prospective implant site, which may result in various complications. The purpose of the present study was to compare the ability of thermocouples and infrared thermography to detect changes in intraosseous temperature during dental implant site preparation...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29336567/non-isothermal-spreading-dynamics-of-self-rewetting-droplets
#5
Dimitrios Mamalis, Vasileios Koutsos, Khellil Sefiane
We experimentally studied the spreading dynamics of binary alcohol mixtures (and pure liquids for reference) deposited on a heated substrate in a partially wetting situation, under non-isothermal conditions. We show that the spreading mechanism of an evaporating droplet exhibits a power law growth with early-stage exponents that depend strongly and non-monotonically on substrate temperature. Moreover, we investigated the temporal and spatial thermal dynamics in the droplet using infrared thermography revealing the existence of unique thermal patterns due to thermal and/or solutal instabilities which lead to surface tension gradients, namely Marangoni effect...
January 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29332760/ischemic-compression-and-kinesiotherapy-on-chronic-myofascial-pain-in-breast-cancer-survivors
#6
Flávia Belavenuto Rangon, Vânia Tiê Koga Ferreira, Monique Silva Rezende, Amanda Apolinário, Ana Paula Ferro, Elaine Caldeira de Oliveira Guirro
OBJECTIVE: assess the effects of ischemic compression and kinesiotherapy on the rehabilitation of breast cancer survivors with chronic myofascial pain. METHODS: A randomized, controlled, blinded clinical trial was performed with 20 breast cancer survivors with myofascial trigger point in the upper trapezius muscle. Patients were randomly allocated to ischemic compression + kinesiotherapy (G1, n = 10) and kinesiotherapy (G2, n = 10). Both groups were submitted to 10 sessions of treatment...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332101/is-kinesio-taping-to-generate-skin-convolutions-effective-for-increasing-local-blood-circulation
#7
Jae-Man Yang, Jung-Hoon Lee
BACKGROUND It is unclear whether traditional application of Kinesio taping, which produces wrinkles in the skin, is effective for improving blood circulation. This study investigated local skin temperature changes after the application of an elastic therapeutic tape using convolution and non-convolution taping methods (CTM/NCTM). MATERIAL AND METHODS Twenty-eight pain-free men underwent CTM and NCTM randomly applied to the right and left sides of the lower back. Using infrared thermography, skin temperature was measured before, immediately after application, 5 min later, 15 min later, and after the removal of the tape...
January 14, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29323451/microvascular-involvement-in-systemic-sclerosis-and-systemic-lupus-erythematosus
#8
Didem Saygin, Kristin Highland, Adriano R Tonelli
Microvascular changes play central roles in the pathophysiology of systemic sclerosis (SSc) and systemic lupus erythematosus (SLE), and represent major causes of morbidity and mortality in these patients. Therefore, clinical tools that can assess the microvasculature are of great importance both at the time of diagnosis and follow up of these cases. These tools include capillaroscopy, laser imaging techniques, infrared thermography and iontophoresis. In this review, we examined the clinical manifestations and pathobiology of microvascular involvement in SSc and SLE as well as the methodologies used to evaluate the microvasculature...
January 11, 2018: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/29310889/how-hot-are-they-neural-correlates-of-genital-arousal-an-infrared-thermographic-and-functional-magnetic-resonance-imaging-study-of-sexual-arousal-in-men-and-women
#9
Mayte Parada, Marina Gérard, Kevin Larcher, Alain Dagher, Yitzchak M Binik
BACKGROUND: The few studies that have examined the neural correlates of genital arousal have focused on men and are methodologically hard to compare. AIM: To investigate the neural correlates of peripheral physiologic sexual arousal using identical methodology for men and women. METHODS: 2 groups (20 men, 20 women) viewed movie clips (erotic, humor) while genital temperature was continuously measured using infrared thermal imaging. Participants also continuously evaluated changes in their subjective arousal and answered discrete questions about liking the movies and wanting sexual stimulation...
January 5, 2018: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29278361/enhanced-infrared-image-processing-for-impacted-carbon-glass-fiber-reinforced-composite-evaluation
#10
Hai Zhang, Nicolas P Avdelidis, Ahmad Osman, Clemente Ibarra-Castanedo, Stefano Sfarra, Henrique Fernandes, Theodore E Matikas, Xavier P V Maldague
In this paper, an infrared pre-processing modality is presented. Different from a signal smoothing modality which only uses a polynomial fitting as the pre-processing method, the presented modality instead takes into account the low-order derivatives to pre-process the raw thermal data prior to applying the advanced post-processing techniques such as principal component thermography and pulsed phase thermography. Different cases were studied involving several defects in CFRPs and GFRPs for pulsed thermography and vibrothermography...
December 26, 2017: Sensors
https://www.readbyqxmd.com/read/29224121/high-definition-infrared-thermography-of-ice-nucleation-and-propagation-in-wheat-under-natural-frost-conditions-and-controlled-freezing
#11
David P Livingston, Tan D Tuong, J Paul Murphy, Lawrence V Gusta, Ian Willick, Micheal E Wisniewski
An extremely high resolution infrared camera demonstrated various freezing events in wheat under natural conditions. Many of those events shed light on years of misunderstanding regarding freezing in small grains. Infrared thermography has enhanced our knowledge of ice nucleation and propagation in plants through visualization of the freezing process. The majority of infrared analyses have been conducted under controlled conditions and often on individual organs instead of whole plants. In the present study, high-definition (1280 × 720 pixel resolution) infrared thermography was used under natural conditions to visualize the freezing process of wheat plants during freezing events in 2016 and 2017...
December 9, 2017: Planta
https://www.readbyqxmd.com/read/29216095/absorption-measurements-in-optical-coatings-by-lock-in-thermography
#12
Feng Liu, Laurent Gallais
We evaluate and apply lock-in thermography as a method to quantitatively evaluate absorption losses of optical coatings. The principle of the method consists of applying periodically modulated laser intensity on the coatings and to monitor the periodic surface temperature evolution with an infrared camera. By application of a lock-in correlation procedure and using calibrated absorption samples, it is possible to obtain quantitative absorption values and to obtain absorption mappings with spatial resolution that depends on the optical configuration...
November 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/29210985/fatigue-damage-evaluation-of-short-carbon-fiber-reinforced-plastics-based-on-phase-information-of-thermoelastic-temperature-change
#13
Daiki Shiozawa, Takahide Sakagami, Yu Nakamura, Shinichi Nonaka, Kenichi Hamada
Carbon fiber-reinforced plastic (CFRP) is widely used for structural members of transportation vehicles such as automobile, aircraft, or spacecraft, utilizing its excellent specific strength and specific rigidity in contrast with the metal. Short carbon fiber composite materials are receiving a lot of attentions because of their excellent moldability and productivity, however they show complicated behaviors in fatigue fracture due to the random fibers orientation. In this study, thermoelastic stress analysis (TSA) using an infrared thermography was applied to evaluate fatigue damage in short carbon fiber composites...
December 6, 2017: Sensors
https://www.readbyqxmd.com/read/29156650/nondestructive-evaluation-of-carbon-fiber-bicycle-frames-using-infrared-thermography
#14
Rubén Usamentiaga, Clemente Ibarra-Castanedo, Matthieu Klein, Xavier Maldague, Jeroen Peeters, Alvaro Sanchez-Beato
Bicycle frames made of carbon fibre are extremely popular for high-performance cycling due to the stiffness-to-weight ratio, which enables greater power transfer. However, products manufactured using carbon fibre are sensitive to impact damage. Therefore, intelligent nondestructive evaluation is a required step to prevent failures and ensure a secure usage of the bicycle. This work proposes an inspection method based on active thermography, a proven technique successfully applied to other materials. Different configurations for the inspection are tested, including power and heating time...
November 20, 2017: Sensors
https://www.readbyqxmd.com/read/29154261/electrical-impedance-of-the-torso-is-associated-with-the-pressure-pain-threshold-on-myofascial-trigger-points-in-patients-with-chronic-neck-pain-a-cross-sectional-study
#15
Almir Vieira Dibai-Filho, Marília Artese Barros, Alessandra Kelly de Oliveira, Rinaldo Roberto de Jesus Guirro
BACKGROUND: Myofascial trigger points are dysfunctional structures present in skeletal muscles and are related to sensory, motor, and autonomic changes. Despite scientific advances in recent decades in the measurement of musculoskeletal pain, evaluation of this clinical phenomenon is supported with instruments that, although valid and reliable, have a considerable degree of subjectivity. OBJECTIVE: To correlate electrical impedance of the upper limbs and torso with pain intensity, functional capacity, catastrophizing, pressure pain threshold, and skin temperature on myofascial trigger points in the upper trapezius muscle of patients with neck pain...
November 10, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29143240/dynamic-infrared-thermography-dirt-for-assessment-of-skin-blood-perfusion-in-cranioplasty-a-proof-of-concept-for-qualitative-comparison-with-the-standard-indocyanine-green-video-angiography-icga
#16
P Rathmann, C Chalopin, D Halama, P Giri, J Meixensberger, D Lindner
PURPOSE: Complications in wound healing after neurosurgical operations occur often due to scarred dehiscence with skin blood perfusion disturbance. The standard imaging method for intraoperative skin perfusion assessment is the invasive indocyanine green video angiography (ICGA). The noninvasive dynamic infrared thermography (DIRT) is a promising alternative modality that was evaluated by comparison with ICGA. METHODS: The study was carried out in two parts: (1) investigation of technical conditions for intraoperative use of DIRT for its comparison with ICGA, and (2) visual and quantitative comparison of both modalities in a proof of concept on nine patients...
November 15, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29138741/challenges-to-global-implementation-of-infrared-thermography-technology-current-perspective
#17
Michael Shterenshis
Medical infrared thermography (IT) produces an image of the infrared waves emitted by the human body as part of the thermoregulation process that can vary in intensity based on the health of the person. This review analyzes recent developments in the use of infrared thermography as a screening and diagnostic tool in clinical and nonclinical settings, and identifies possible future routes for improvement of the method. Currently, infrared thermography is not considered to be a fully reliable diagnostic method...
2017: Central Asian Journal of Global Health
https://www.readbyqxmd.com/read/29121540/computer-aided-diagnosis-of-diabetic-foot-using-infrared-thermography-a-review
#18
Muhammad Adam, Eddie Y K Ng, Jen Hong Tan, Marabelle L Heng, Jasper W K Tong, U Rajendra Acharya
Diabetes mellitus (DM) is a chronic metabolic disorder that requires regular medical care to prevent severe complications. The elevated blood glucose level affects the eyes, blood vessels, nerves, heart, and kidneys after the onset. The affected blood vessels (usually due to atherosclerosis) may lead to insufficient blood circulation particularly in the lower extremities and nerve damage (neuropathy), which can result in serious foot complications. Hence, an early detection and treatment can prevent foot complications such as ulcerations and amputations...
December 1, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29119718/glucocorticoids-suppress-brown-adipose-tissue-function-in-humans-a-double-blind-placebo-controlled-study
#19
Moe Thuzar, Weikiat Phillip Law, Jeyakantha Ratnasingam, Christina Jang, Goce Dimeski, Ken K Y Ho
AIM: To investigate the effect of glucocorticoids on brown adipose tissue (BAT) function in humans. MATERIALS AND METHODS: In a randomized double-blind cross-over design, 13 healthy adults underwent 1 week of oral prednisolone treatment (15 mg/d) and placebo with an intervening 2-week wash-out period. BAT function was assessed in response to cooling (19°C) and to a standardized meal, by measuring fluoro-deoxyglucose (FDG) uptake using positron emission tomography-computed tomography and skin temperatures overlying the supraclavicular (SCL) BAT depots using infrared thermography...
November 8, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29114526/skin-temperature-response-to-unilateral-training-measured-with-infrared-thermography
#20
Víctor L Escamilla-Galindo, Alejandro Estal-Martínez, Jakub G Adamczyk, Ciro José Brito, Javier Arnaiz-Lastras, Manuel Sillero-Quintana
This study aimed to identify the skin temperature (Tsk) behavior to understand the acute cross-effect after unilateral training of lower-limbs. Seventeen healthy young men (weight, 75.2±5.5 kg; height, 1.8±0.1 m; age, 22.5±1.6 years) were divided into two groups: high-trained (n=8) and low-trained (n=9). All participants performed: (a) one-repetition maximum (1RM) testing protocol on the leg press, (b) a unilateral training protocol (4×10 repetitions at 70% of 1RM for leg press and 4×10 repetitions at 50% of 1RM for knee extension)...
October 2017: Journal of Exercise Rehabilitation
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