IR Thermal Imaging of a Monkey’s Head: Local Temperature Changes in Response to Somatosensory Stimulation

AbstractLocal scale estimates of temperature change in the twenty-first century are necessary for informed decision making in both the public and private sector. In order to generate such estimates for Chile, weather station data of the Dirección Meteorológica de Chile are used to identify large-scale predictors for local-scale temperature changes and construct individual empirical-statistical models for each station. The geographical coverage of weather stations ranges from Arica in the North to Punta Arenas in the South. Each model is trained in a cross-validated stepwise linear multiple regression procedure based on (24) weather station records and predictor time series derived from ERA-Interim reanalysis data. The time period 1979–2000 is used for training, while independent data from 2001 to 2015 serves as a basis for assessing model performance. The resulting transfer functions for each station are then directly coupled to MPI-ESM simulations for future climate change under emission scenarios RCP2.6, RCP4.5 and RCP 8.5 to estimate the local temperature response until 2100 A.D. Our investigation into predictors for local scale temperature changes support established knowledge of the main drivers of Chilean climate, i.e. a strong influence of the El Niño Southern Oscillation in northern Chile and frontal system-governed climate in central and southern Chile. Temperature downscaling yields high prediction skill scores (ca. 0.8), with highest scores for the mid-latitudes. When forced with MPI-ESM simulations, the statistical models predict local temperature deviations from the 1979–2015 mean that range between − 0.5–2 K, 0.5–3 K and 2–7 K for RCP2.6, RCP4.5 and RCP8.5 respectively.

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A Fluorescent Nanoprobe to Detect Local Temperature Changes During Antitumoral Hyperthermia Therapy

Biophysical Journal ◽

10.1016/j.bpj.2019.11.2645 ◽

2020 ◽

Vol 118 (3) ◽

pp. 477a

Author(s):

Cynthia El Hedjaj ◽

Imène Chebbi ◽

Olivier Seksek ◽

Edouard Alphandery

Keyword(s):

Local Temperature ◽

Temperature Changes ◽

Fluorescent Nanoprobe ◽

Hyperthermia Therapy

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Local Temperature Determination Using Elfs Spectroscopy

Microscopy and Microanalysis ◽

10.1017/s1431927600011879 ◽

1997 ◽

Vol 3 (S2) ◽

pp. 997-998

Author(s):

M. Qian ◽

M. Sarikaya ◽

E. A. Stern

Keyword(s):

Fine Structure ◽

Local Temperature ◽

Temperature Changes ◽

Structure Information ◽

Temperature Determination ◽

Simultaneous Imaging ◽

Quantitative Measurements ◽

High Resolution Tem ◽

Physical Phenomena ◽

First Time

ELFS spectroscopy (energy loss fine structure) is used to obtain local atomic structure information It can outperform XAFS (x-ray absorption fine structure) not only because of its low Z element sensitivity, but also because of its high spatial resolution and the capability of combining other high resolution TEM measurements. Although TEM continues to gain importance as an indispensable and unique tool to study nanoscale phenomena by providing simultaneous imaging, diffraction, and spectroscopy information, direct observation and quantitative measurements of physical phenomena are also desirable. This paper gives a first-time demonstration of such a measurement, namely local temperature determination in a TEM sample by ELFS.The principle is simple and as follows. One can measure, with ELFS, the atomic distances up to ±0.01 Å accuracy for the fist shell (typically around 2 Å ) and the second shell (around 3-4 Å). Atomic distances in a sample will change when its temperature changes, the phenomena that are coupled by the macroscopic temperature dependent lattice expansion.

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Refinement and validation of infrared thermal imaging (IRT): a non-invasive technique to measure disease activity in a mouse model of rheumatoid arthritis

Arthritis Research & Therapy ◽

10.1186/s13075-020-02367-w ◽

2020 ◽

Vol 22 (1) ◽

Author(s):

Zeynab Nosrati ◽

Marta Bergamo ◽

Cristina Rodríguez-Rodríguez ◽

Katayoun Saatchi ◽

Urs O. Häfeli

Keyword(s):

Rheumatoid Arthritis ◽

Mouse Model ◽

Disease Activity ◽

Thermal Imaging ◽

High Throughput Screening ◽

Invasive Technique ◽

Computer Assisted ◽

Infrared Thermal Imaging ◽

Ir Camera ◽

Temperature Changes

Abstract Background The discovery and development of new medicines requires high-throughput screening of possible therapeutics in a specific model of the disease. Infrared thermal imaging (IRT) is a modern assessment method with extensive clinical and preclinical applications. Employing IRT in longitudinal preclinical setting to monitor arthritis onset, disease activity and therapeutic efficacies requires a standardized framework to provide reproducible quantitative data as a precondition for clinical studies. Methods Here, we established the accuracy and reliability of an inexpensive smartphone connected infrared (IR) camera against known temperature objects as well as certified blackbody calibration equipment. An easy to use protocol incorporating contactless image acquisition and computer-assisted data analysis was developed to detect disease-related temperature changes in a collagen-induced arthritis (CIA) mouse model and validated by comparison with two conventional methods, clinical arthritis scoring and paw thickness measurement. We implemented IRT to demonstrate the beneficial therapeutic effect of nanoparticle drug delivery versus free methotrexate (MTX) in vivo. Results The calibrations revealed high accuracy and reliability of the IR camera for detecting temperature changes in the rheumatoid arthritis animal model. Significant positive correlation was found between temperature changes and paw thickness measurements as the disease progressed. IRT was found to be superior over the conventional techniques specially at early arthritis onset, when it is difficult to observe subclinical signs and measure structural changes. Conclusion IRT proved to be a valid and unbiased method to detect temperature changes and quantify the degree of inflammation in a rapid and reproducible manner in longitudinal preclinical drug efficacy studies.

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Regional Temperature Changes in the Brain during Somatosensory Stimulation

Journal of Cerebral Blood Flow & Metabolism ◽

10.1038/sj.jcbfm.9600164 ◽

2005 ◽

Vol 26 (1) ◽

pp. 68-78 ◽

Cited By ~ 48

Author(s):

Hubert KF Trübel ◽

Laura I Sacolick ◽

Fahmeed Hyder

Keyword(s):

Somatosensory Stimulation ◽

Temperature Changes ◽

Regional Temperature ◽

The Brain

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Thermovision assessment of temperature changes in selected body areas after short-wave diathermy treatment

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-021-11136-z ◽

2021 ◽

Author(s):

Bożena Kaźmierska ◽

Krzysztof Andrzej Sobiech ◽

Ewa Demczuk - Włodarczyk ◽

Agnieszka Chwałczyńska

Keyword(s):

Knee Joint ◽

Surface Temperature ◽

Thermal Imaging ◽

Cold Pressor ◽

Short Wave ◽

The Body ◽

System Level ◽

Physical Treatment ◽

Temperature Changes ◽

The Right

AbstractThe aim of this study is to provide the thermal imaging assessment of local and general surface temperature changes after short-wave diathermy treatment. The study group consisted of 26 women aged 19–24. The correct functioning of the thermoregulation system was determined by means of cold pressor and orthostatic tests. The subjects underwent short-wave diathermy treatment in the area of the right knee joint, and the body’s response was determined by thermovision using a ThermaCAM P640 thermal imaging camera manufactured by FLIR. Curves were recorded in a digital form (images with a resolution of 640 × 480 pixels) and analyzed with ThermaCAM ReporterTM software. In people with a properly functioning thermoregulation system, the short-wave diathermy treatment statistically significantly increased the body surface temperature on the posterior surface of the knee joint. On the front side, the surface temperature decreased. There were no changes in surface temperature in the other areas of the body studied. The results of thermal imaging studies confirmed the local nature of the action of short-wave diathermy. The recommendation to use a physical procedure should be preceded by an assessment of the body’s thermoregulation system level of function. Reactions to the prescribed physical treatment may be different in people with a disturbed autonomic system.

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Infrared Thermal Imaging for Evaluation of Clubfoot After the Ponseti Casting Method—An Exploratory Study

Frontiers in Pediatrics ◽

10.3389/fped.2021.595506 ◽

2021 ◽

Vol 9 ◽

Author(s):

Balasankar Ganesan ◽

Joanne Yip ◽

Ameersing Luximon ◽

Paul J. Gibbons ◽

Alison Chivers ◽

...

Keyword(s):

Skin Temperature ◽

Infrared Thermography ◽

Thermal Imaging ◽

Lateral Side ◽

Thermal Images ◽

Temperature Changes ◽

Surgical Methods ◽

Before And After ◽

Significant Temperature ◽

Casting Pressure

Background: Conservative treatment, Ponseti method, has been considered as a standard method to correct the clubfoot deformity among Orthopedic society. Although the result of conservative methods have been reported with higher success rates than surgical methods, many more problems have been reported due to improper casting, casting pressure or bracing discomfort. Nowadays, infrared thermography (IRT) is widely used as a diagnostic tool to assess musculoskeletal disorders or injuries by detecting temperature abnormalities. Similarly, the foot skin temperature evaluation can be added along with the current subjective evaluation to predict if there is any casting pressure, excessive manipulation, or overcorrections of the foot, and other bracing pressure-related complications.Purpose: The main purpose of this study was to explore the foot skin temperature changes before and after using of manipulation and weekly castings.Methods: This is an explorative study design. Infrared Thermography (IRT), E33 FLIR thermal imaging camera model, was used to collect the thermal images of the clubfoot before and after casting intervention. A total of 120 thermal images (Medial region of the foot–24, Lateral side of the foot–24, Dorsal side of the foot−24, Plantar side of the foot−24, and Heel area of the foot–24) were collected from the selected regions of the clubfoot.Results: The results of univariate statistical analysis showed that significant temperature changes in some regions of the foot after casting, especially, at the 2nd (M = 32.05°C, SD = 0.77, p = 0.05), 3rd (M = 31.61, SD = 1.11; 95% CI: 31.27–31.96; p = 0.00), and 6th week of evaluation on the lateral side of the foot (M = 31.15°C, SD = 1.59; 95% CI: 30.75–31.54, p = 0.000). There was no significant temperature changes throughout the weekly casting in the medial side of the foot. In the heel side of the foot, significant temperature changes were noticed after the third and fourth weeks of casting.Conclusion: This study found that a decreased foot skin temperature on the dorsal and lateral side of the foot at the 6th week of thermography evaluation. The finding of this study suggest that the infrared thermography (IRT) might be useful as an adjunct assessment tool to evaluate the thermophysiological changes, which can be used to predict the complications caused by improper casting, over manipulative or stretching and casting-pressure related complications.

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Influence of Local Temperature Changes on the Material Microstructure in Abrasive Water Jet Machining (AWJM)

Materials ◽

10.3390/ma14185399 ◽

2021 ◽

Vol 14 (18) ◽

pp. 5399

Author(s):

Sławomir Spadło ◽

Damian Bańkowski ◽

Piotr Młynarczyk ◽

Irena M. Hlaváčová

Keyword(s):

Local Heat Transfer ◽

Water Jet ◽

Local Temperature ◽

Adjacent Area ◽

Abrasive Water Jet ◽

Material Microstructure ◽

Temperature Changes ◽

Abrasive Water Jet Machining ◽

Jet Impact ◽

The Impact

This article considers effects of local heat transfer taking place insteel cutting by abrasive water jet machining (AWJM). The influence of temperature changes during AWJM has not been investigated thoroughly. Most studies on AWJM suggest that thermal energy has little or no effect on the material cut. This study focused on the analysis of the material microstructure and indentation microhardness in the jet impact zone and the adjacent area. The structure features revealed through optical metallography and scanning microscopy suggest local temperature changes caused by the impact of the abrasive water jet against the workpiece surface. From the microscopic examinationand hardness tests, it is clear that, during the process, large amounts of energy were transferred locally. The mechanical stress produced by the water jet led to plastic deformation at and near the surface. This was accompanied by the generation and transfer of large amounts of heat resulting in a local rise in temperature to 450 °C or higher.

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