scholarly journals Smartphone Thermal Imaging Can Enable the Safer Use of Propeller Flaps

2020 ◽  
Vol 34 (03) ◽  
pp. 161-164
Author(s):  
Geoffrey G. Hallock
Keyword(s):  
Thermal Imaging ◽  
Hot Spots ◽  
Cell Phone ◽  
Postoperative Monitoring ◽  
Complementary Method ◽  
Preferred Direction ◽  
Propeller Flap ◽  
Proper Interpretation ◽  
Hub Effect

AbstractThe use of thermography for the identification of cutaneous “hot spots” that coincide with perforators is not a new concept, but the required professional cameras may be prohibitively expensive. Only relatively recently, incredibly cheap but adequate thermal imaging cameras have become available that work in concert with the ubiquitous cell phone. This can now serve as a rapid, accurate, and complementary method for finding a perforator sufficient to serve as the hub for a perforator pedicled propeller flap. In addition, the preferred direction of rotation about that hub, effect of flap insetting on perfusion, and then postoperative monitoring are possible by proper interpretation of corresponding thermograms. Every reconstructive surgeon should be able to obtain this device, and then easily learn what potential attributes for them are available when planning a propeller flap.

scholarly journals Thermal imaging of hot spots in nanostructured microstripes

2010 ◽  
Vol 214 ◽  
pp. 012098
Author(s):  
E Saïdi ◽  
J Lesueur ◽  
L Aigouy ◽  
J Labéguerie-Egéa ◽  
M Mortier
Keyword(s):  
Thermal Imaging ◽  
Hot Spots

scholarly journals Temperature Distribution of Selected Body Surfaces in Scoliosis Based on Static Infrared Thermography

2020 ◽  
Vol 17 (23) ◽  
pp. 8913
Author(s):  
Anna Lubkowska ◽  
Ewa Gajewska
Keyword(s):  
Thermal Imaging ◽  
Rotation Angle ◽  
Reference Group ◽  
The Body ◽  
Healthy Children ◽  
High Positive Correlation ◽  
Complementary Method ◽  
Muscular Tension ◽  
Imaging Camera ◽  
Spinal Rotation

The purpose of the research was to assess the usefulness of thermography as a complementary method in musculoskeletal dysfunction, with particular emphasis on scoliosis. The children, aged 7–16, were classified into one of two groups: the study group—children with scoliosis (n = 20), and the reference group—healthy children (n = 20). All children underwent anthropometric tests, body mass index determination, four pictures each with a FLIR T1030sc HD thermal imaging camera, and measurement of spinal rotation with a scoliometer (Gima, Italy). There is a temperature differential (about 4 °C) within the upper and lower body in children. In healthy children, differences in temperature of contralateral areas of the body do not exceed 0.5 °C. Thermography is a useful and noninvasive method of assessing muscular tension disbalance in the course of scoliosis. In the case of scoliosis, the areas of the body with a significant thermal asymmetry of the surface are the upper back, thighs, and back of the lower legs. Due to the high positive correlation of the spinal rotation angle with the amount of thermal asymmetry, the areas that should be subjected to a detailed thermal assessment in the supplementary diagnosis of scoliosis using thermovision are the upper back, chest, thighs, and back of the lower legs.

Smartphone Thermography for Lower Extremity Local Flap Perforator Mapping

2020 ◽  
Author(s):  
Nicolás Pereira ◽  
Geoffrey G. Hallock
Keyword(s):  
Lower Extremity ◽  
Hot Spots ◽  
Perforator Flap ◽  
Screening Tools ◽  
Local Flaps ◽  
Perforator Flaps ◽  
Postoperative Monitoring ◽  
Flap Design ◽  
A Prospective Study ◽  
Flap Perfusion

Abstract Background The versatile application of local perforator flaps for coverage throughout the lower extremity has already been well proven. Often a “free-style” approach has been used to design these flaps, as conventional imaging devices for perforator identification may be too expensive or unavailable. The recent adaptation of Smartphone thermal digital imaging may now prove to be a cheaper and more readily available means for identifying the requisite perforators that will sustain these local flaps. Methods Over the past year, a prospective study was undertaken of all patients having a local perforator flap for coverage of a lower extremity defect. Twenty-eight local perforator flaps involving all subtypes were utilized in 25 patients. Smartphone thermography was used in all patients preoperatively to identify preferable perforator or vascular network “hot spots” that allowed appropriate flap design. Intraoperative and postoperative monitoring was similarly done for all flaps to determine outcomes. Results All local perforator flaps were based on perforators identified using smartphone thermography. All flaps (23 or 82.1%) that the thermal digital image predicted 100% viability totally survived. Five flaps were predicted to have marginal viability, but two nevertheless survived completely while the others required only minor readjustments. Peninsular and keystone variety perforator flaps were those most commonly used.Thermography always facilitated making the correct decision as to whether a proximal- or distal-based peninsular flap would be superior. Subfascial elevation of cool spots in keystone flaps were found to be least likely to interfere with flap perfusion. Conclusion Smartphone thermography is an inexpensive and expeditious means for identification of “hot spots” that is always used by us to ensure perfusion to lower extremity perforator local flaps. This is a complementary technique for their safer design, harvest, and subsequent monitoring in conjunction with more complex screening tools as indicated.

Hot spots in energetic materials generated by infrared and ultrasound, detected by thermal imaging microscopy

2014 ◽  
Vol 85 (2) ◽  
pp. 023705 ◽  
Author(s):  
Ming-Wei Chen ◽  
Sizhu You ◽  
Kenneth S. Suslick ◽  
Dana D. Dlott
Keyword(s):  
Thermal Imaging ◽  
Hot Spots ◽  
Energetic Materials

Study of the Localized Heating of Si Solar Cells by Thermal Imaging and Scanning Electron Microscopy

2013 ◽  
Vol 770 ◽  
pp. 157-160
Author(s):  
Buntoon Wiengmoon
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solar Cells ◽  
Energy Dispersive Spectroscopy ◽  
Thermal Imaging ◽  
Hot Spots ◽  
Micro Cracks ◽  
Impurity Contamination ◽  
Localized Heating ◽  
Scanning Electron

The aim of this study was to investigate the localized solar cells heating by thermal imaging, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The electrical measurements and thermal infrared measurements were done on the commercial crystalline Si cells (10 cm x 10 cm). SEM was used for the observation of the localized heating. The I-V characteristics of all cells were quite similar with a small spread in the electrical parameters, while the IR images were different: some cells had quite uniform temperature profiles distribution and other ones showed the localized heating. The energy dispersive spectroscopy (EDS) analysis showed that some hot spots have high metal impurity contamination. The micro-structure investigation of hot spots revealed the micro-cracks presence. Our study found direct correlation between areas of high impurity contamination, micro cracks and hot-spot heating.

scholarly journals A feasibility study of cell phone and landline phone interviews for monitoring of risk and protection factors for chronic diseases in Brazil

2011 ◽  
Vol 27 (2) ◽  
pp. 277-286 ◽  
Author(s):  
Erly Catarina Moura ◽  
Rafael Moreira Claro ◽  
Regina Bernal ◽  
Juliano Ribeiro ◽  
Deborah Carvalho Malta ◽  
...  
Keyword(s):  
Sex Education ◽  
Cell Phone ◽  
Communicable Diseases ◽  
Health Condition ◽  
Study Objective ◽  
Non Communicable Diseases ◽  
Complementary Method ◽  
Adult Cell ◽  
Interview System ◽  
Low Educated

The study objective was to evaluate the feasibility of interviews by cell phone as a complement to interviews by landline to estimate risk and protection factors for chronic non-communicable diseases. Adult cell phone users were evaluated by random digit dialing. Questions asked were: age, sex, education, race, marital status, ownership of landline and cell phones, health condition, weight and height, medical diagnosis of hypertension and diabetes, physical activity, diet, binge drinking and smoking. The estimates were calculated using post-stratification weights. The cell phone interview system showed a reduced capacity to reach elderly and low educated populations. The estimates of the risk and protection factors for chronic non-communicable diseases in cell phone interviews were equal to the estimates obtained by landline phone. Eligibility, success and refusal rates using the cell phone system were lower than those of the landline system, but loss and cost were much higher, suggesting it is unsatisfactory as a complementary method in such a context.

Thermal Evaluation of High-Current Polyimide Rigid and Rigid-Flex Printed Wiring Board Trace Widths in a Vacuum

2013 ◽  
Vol 2013 (1) ◽  
pp. 000964-000969
Author(s):  
Bennion Cannon ◽  
Frank Friedl ◽  
Gary Gisler
Keyword(s):  
Thermal Imaging ◽  
Hot Spots ◽  
Test Results ◽  
High Current ◽  
Printed Wiring Boards ◽  
Printed Wiring Board ◽  
Thermal Imaging Camera ◽  
Industry Standards ◽  
Imaging Camera ◽  
Wiring Board

This paper details the thermal evaluation of high-current polyimide rigid and rigid-flex printed wiring boards in a vacuum. Although industry standards, such as IPC-2152 or MIL-STD-275, can be used to determine required trace width for PWB traces that carry current to between 20 or 30 amps for multiple copper plane thicknesses, they typically cannot be used to determine trace width for PWB traces that handle current greater than 15 amps. This paper presents results from testing and analysis of high-current rigid and rigid-flex PWBS that must carry current of up to 60 amps. Testing was performed in vacuum on a controlled-temperature platen, measuring board temperature at specific locations to determine performance of different trace widths using 2 and 4 ounce copper layers. A thermal imaging camera was used to identify PWB hot spots. Test results were compared to IPC-2152 standards, extrapolated to 60 amps current.

scholarly journals Operation Problems of Solar Panel Caused by the Surface Contamination

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5461
Author(s):  
Dávid Matusz-Kalász ◽  
István Bodnár
Keyword(s):  
Crystal Structure ◽  
Solar Cells ◽  
Thermal Imaging ◽  
Hot Spots ◽  
Structural Damage ◽  
Energy Production ◽  
Negative Impact ◽  
Surface Contamination ◽  
Solar Panels ◽  
Power Losses

Solar panels have been widely criticized for their weather dependence and slowly improving efficiency. Several external factors can further increase the efficiency of solar panels, e.g., shading effect and surface contamination. We investigated the warming effect and the negative impact of these factors on energy production during the research. The continuous operation at high temperatures can modify the crystal structure of solar cells in these hot spots. The electroluminescence (EL) images and thermal imaging measurements show crystal structure failure. In addition to structural damage and rapid aging of the solar cells, contaminants can cause power losses of up to 10%.

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